Tuesday, December 22, 2020

Male voice the moon represents my heart form 2 x300W HIFI Stereo Discrete Component Power Amplifier

Male voice of the moon represents my heart form 2 x300W HIFI Stereo Discrete Component Power Amplifier


This is a high-power stereo power amplifier made of discrete components. 




The power amplifier board uses a discrete high-power finished power amplifier board with discrete components, and its maximum power can reach 300W+300W. Support Bluetooth connection, play with U disk and card reader (support WVA, FLCA, APE, MP3 audio format).

Tuesday, December 15, 2020

IWISTAO 3-4 Inch Full Range Empty Speaker Cabinet Labyrinth Solid Wood Strengthening Bolts Inside for Tube Amp

IWISTAO 3-4 Inch Full Range Empty Speaker Cabinet Labyrinth Solid Wood Strengthening Bolts Inside for Tube Amp



This speaker cabinet is made of solid wood with strengthening bolts inside, suitable for 4-inch and 3-inch full-range speakers.

Built-in a labyrinth structure, it can enhance the low-frequency radiant energy, make low-frequency dive deeper, effectively overcoming insufficient bass of commend full range speaker cabinet, make the speaker cabinet the full-frequency be more full and rich.






As you know, the greater the material density of the speaker enclosure, the less the vibration produced by the enclosure. Solid wood is more reflective of sound than other materials, and tightness of the wood is higher, and the sound can be effectively expressed by the vibration of the air inside the box. We often say that the sound of wooden speakers is warm, in fact, the word warm means the balance of tri-band that are low, medium and high frequency; if the frequency is too low or too high, it will make people feel uncomfortable. The advantage of wooden speaker is that its playback effect is good, the vibration of the sound inside the box is stable, and the sound effect will be balanced and full.

The tube amplifier is used vacuum tube 6P14 as power amplifier.



More details, please find,


And here, you can see the processing of making this empty cabinet.



Monday, December 14, 2020

A HIFI CD Player with Dual Vacuum Tube 6N3/GE5770 Output


A HIFI CD Player with Dual Vacuum Tube 6N3/GE5770 Output

This is a HIFI CD player with vacuum tube output, and product quality is reliable and very stable, durable, good effect. As a high quality CD player, the key parts are movement and decoding. The CD player adopted high quality movement and its servo circuit clock using active crystal, reducing the shaking of movement, so that it has very strong and accurate reading disc ability. And, its decoding part adopted absolute praise DAC decoder chip PCM1795).




About its output part, it adopted vacuum tube to amplify the output, which has a low internal resistance, good linearity, the so-called digital sound for CD player had greatly improved. With this tube CD player, you are no longer a junior audiophile, its sweet sound you will miss, and unforgettable.

Our engineers specialized in sound sourcing for CD player and decoder design, and have more than 15 years experiences, and our goal is to pursuit perfect sound quality. Researching and development for our products must undergo a rigorous testing and tuning, product type approval or appraisal must pass a number of audition and tuning and trial run.




More details, please find here,

Wednesday, December 9, 2020

IWISTAO HIFI Mini Tube Amplifier 2x3W Class A Single-ended 6J1 Preamplifier 6P1 Power Stage plus Tone Adjustment Preamp

IWISTAO HIFI Mini Tube Amplifier 2x3W Class A Single-ended 6J1 Preamplifier 6P1 Power Stage plus Tone Adjustment Preamp





This is a mini class A single-ended tube amplifier, which use tube 6J1 as a preamplifier, and tube 6P1 as a power stage. Especially, it adopted switching power supply instead of power transformer to reduce the weight and volume of tube amplifier, also adopted boost circuitry to provide high voltage, its background noise is mostly between 0.5 mV to 1 mV, when volume potentiometer close to the minimum, and your ear touch to the speaker, and hum is not likely to be heard.




And, the preamplifier has tone control functions and adopts class A power, sound extremely delicate, slender high-frequency, low frequency plump and elastic, if use top op amp IC like as OPA2604 or LME49720, it will achieve perfect sound. Specially, it used a R-type audio dedicated transformer. And it has direct access function; you can skip tone adjustment to achieve original sound completely.


When audio sourcing record, speaker unit, placing the device is not necessarily perfect, and if your preamplifier adopt pure straight, it may not be able to meet the demand. At this moment, add tone adjustment function is very important. If you no extra power supply equipment, passive preamp tone is preferred, which can enhance the effect of high and low frequency is obvious.

More details, please find here,



Thursday, November 26, 2020

IWISTAO LA1235 FM Stereo Radio Tuner High Frequency FAE352 IF 4 Stages TA7302P Decoder LA3401

IWISTAO LA1235 FM Stereo Radio Tuner High Frequency FAE352 IF 4 Stages TA7302P Decoder LA3401


The LA1235 is recognized as a high-performance discriminator. The board's high frequency tuner is FAE352, the preparing Intermediate frequency amplification is the two-stage TA7302P, the discriminator is LA1235, after then the signal is very powerful, and finally FM stereo decoding of the LA3401 makes its sound clear and beautiful.

After the board is connected to HIFI amplifier and speakers, stereo FM radio can be played.



The board of Demo is connected with an outdoor antenna, or may connected with about 1.2-meter whip antenna indoor.

More details, please find here,

Tuesday, November 24, 2020

IWISTAO HIFI 3 Inch Full Range Labyrinth Speaker Solid Wood Enclosure

 IWISTAO HIFI 3 Inch Full Range Labyrinth Speaker Solid Wood Enclosure


The speaker uses a 3-inch NdFeB strong magnetic unit. Its low-frequency density is very good, dynamically distinct, the high-frequency extension and air feel are better, and the human voice is sweeter. This uit, first of all, is a magnetic circuit system, tombarthite NdFeB magnetic structure plus a short-circuiting copper sleeve, which solves the thoroughness of medium-high frequency from the starting point. But the selection of cone is more painstaking, cone is mainly composed of bass and medium-high sound. After various screenings, cotton and linen fiber is selected finally. And, the treble must be rigid and soft, then the bamboo plus bark fiber is selected. Through countless trials and adjustments, the effect finally conquered out ears. The final results are that its medium-high frequency density is very good, very thorough, and the background is clean.

Listen to the sound is far wider sound field, better resolution, better layer structured. We are intoxicated by the music, the melody of each neuron start wondered if peristalsis, high, medium and low frequency is very balance, so fantastic! The sound of the human voice is warm, soft and pure, and natural loose, smaller noise pollution, rich musical taste, great flavor, also has a good low-frequency performance, is a treat for the ears, very enjoyable for long time listening and you dont feel tired.



Recommendation of Tube amplifier and power amplifier supported as below.

EL-34B, 6P6P, 6V6, 5881, 6P3P, CF-50, KT88,300B single-end amplifier, or push-pull amplifier. And, class T digital amplifier, HIFI amplifiers and other.



More details, please find 

IWISTAO HIFI 3 Inches Full Range Labyrinth Speaker 2x25W 4Ohms 78Hz-19.5KHz 88dB Max

Saturday, November 21, 2020

Love in Berlin from IWISTAO Pure Class A Mono Power FET Amplifier PassA30

It is a pure class A mono power amplifier, which is a very high degree of completion HIFI amplifier, its sound is silky smoothness, also it is too appealing when you listen to the sound of strings and human voice with the unit, and this is definitely a warm sound amplifier, but unlike a little dim sound of tube amp, its sound is warm and detailed, while low dive control and damping is also very perfect.


As its 30W output power at 30 square meters or below space, both with book shelf speakers or floor speakers, it will have a good performance. Remarkably, its signal to noise ratio control very well, you will hardly hear a little noise when you put your ear to the speaker at deep night, although its power is increased to 30W, but the circuit design more rational, so it is still have higher SNR.

More details, you may fine here https://www.iwistao.com/collections/power-amplifiers/products/1-pc-hifi-amplifier-30w-mono-classa-fet-single-ended-passa30-whole-aluminum-casing-design-upc1237-protection-high-quality-black

Friday, November 20, 2020

Review of IWISTAO WHFSC-FR565WLC-6.5 Speaker cabinets with MARK HI-FI 6.5” Metal Cone Drivers

 Review of IWISTAO WHFSC-FR565WLC-6.5 Speaker cabinets with MARK HI-FI 6.5” Metal Cone Drivers.

Dan Harrison, Music Producer and Owner of Jaguar Music [www.JaguarMusic-MARS.com]

 

A recent living room renovation meant that I would no longer have space for my big LOTH-X AURA home stereo speakers. These feature a 6.5” full range driver similar to a Lowther and an internal labyrinth ending in a front facing horn. They were expensive and well reviewed when I purchased them, but they are large tower speakers and I need to downsize.


I am a professional music producer. When I work in the studio I use monitors designed for accuracy. However, for casual listening in my home, I enjoy the acoustic artifacts created by horn loaded speakers such as the AURAs. The labyrinth/horn design creates a subtle time delay and a phase reversal which gives the listener the illusion of being in a live performance environment. This is especially pleasing for vocal and small ensemble classical and Jazz recordings; but it adds a special dimension to all types of music.

I had always been curious to try a DIY (do it yourself) speaker cabinet matched with a driver of my choice. I spent some time searching options on line and ended up choosing the IWISTAO WHFSC-FR565WLC 6 . 5 s p e a k e r c a b i n e t s . [ h t t p s : / www.iwistao.com/collections/all/products/ iwistao-hifi-speaker-empty-cabinet-6-5inches-1-pair-finished-labyrinth-structuresolid-wood-for-full-range-speakers-unit-diy] They are about 1/3 the size of the LOTH-X AURAs but still feature a 6.5” driver and have a 1.6 meter labyrinth return. They are constructed out of heavy laminated wood with a sophisticated computer assisted engineered acoustical labyrinth similar to the one pictured below:

 When it came to selecting a driver I contemplated several candidates from different sources but after consulting with the sales staff at IWISTAO I decided on a pair of MARK HI-FI 6.5” metal cone drivers which they highly recommended. I reasoned that they had far more engineering experience in speaker design than I did, and if they thought this was the ideal match, I should listen to their advice. That advice turned out to be very well founded.

 In preparation for auditioning the speakers I placed them eight feet apart on elevated stands at ear level about nine feet away from my centered position. I used a Marantz CD 606 compact disc player powered by an AOSIBAO M12 UF 60 integrated amplifier with tone controls set to neutral. This is a class AB hybrid tube amp that delivers 80 Watts per channel. It has a nominal frequency range of 40 - 20,000Hz and a frequency response of 52 - 32Khz ± 3db.

For listening material I chose three recordings I am intimately familiar with: Donald Fagen, “The Nightfly”, Yo Yo Ma, “Soul of the Tango”, and Boz Skaggs, “but beautiful”.  I listened to all three recordings in order to asses the general characteristics of the loudspeakers and summarize my impressions. I then re-listened to the Boz Scaggs CD switching to my LOTH-X AURAs for comparison with the IWISTAO/ MARK HI-FI set.

 

Listening to  “The Nightfly”  On  The

IWISTAO/MARK HI-FI Loudspeakers

 Donald Fagen’s “The Nightfly” was a ground breaking album when it was recorded in 1982. It was one of the very first multi-track all digital recordings to be made. It is exquisitely arranged, produced and engineered and features many of the best studio musicians of the period including Jeff Porcarro, Rick Derringer and Larry Carlton.

 IWISTEO’s MARK HI-FI loaded speakers reproduce this classic recording beautifully. Porcaro’s kick drum is defined and punchy melding with the melodic bass lines to create a solid bottom end. The snare is crisp and slightly metallic with just enough lower frequency and crack to move the track along. Engineer Roger Nichols developed one of the first drum machine synthesizers (which he named “Wendle”) for use on this project. Wendle provided the core of the drum tracks on three of the songs including the famous version of “Ruby Ruby”. The high-hat sounds a little machine-like (an artifact inherent to the primitive drum computer), but real acoustic cymbals with very refined multiple reverbs even out the drums nicely and contribute to the sophisticated stereo imaging of the recording. All of this is well showcased by the IWISTAO speakers.

Piano solos are refined and sparkling: sometimes wide spread in the stereo field and sometimes more narrowly panned. Horns cut through but occupy their own image territory nicely smoothed by just the right selection of reverbs. The magnificent background and combination vocals are chorale-like and shimmer in the mix. Solo sax and guitars shine through but have specific locations in the stereo image as intended. Finally, Donald Fagen’s peculiar voice, intentionally leveled out with compression and brightened by signal enhancement and an assortment of reverbs, acquires both authority and musicality. Listening to this CD on the IWISTAO loudspeakers was like rediscovering an old friend; a true pleasure.

Listening to “The Soul Of The Tango” on the IWISTAO/MARK HI-FI speakers

In 1997, cellist Yo Yo Ma recorded “Soul Of The Tango with a renowned group of players and colleagues of the late Argentinian composer Astor Piazzolla. Piazolla’s work helped vault tango into a major art form as compelling and intimate as the most sophisticated of string quartets. It is worth noting that there are some tracks of the bandoneon (a type of concertina which is common to most tango ensembles) which were played by the composer himself in recordings made prior to his death in 1992.

The basic ensemble for this set of recordings is a quintet consisting of the aforementioned bandoneon, cello, violin, guitar, and piano (though in some of the pieces there are both acoustic and electric guitars).

The IWISTAO speakers generously convey all of the warmth, drama, and subtlety of Piazolli’s work. The stereo imaging and depth of field create an ensemble lushness that soars and enraptures the listener. YoYo Ma’s playing - always extraordinary - is utterly captivating on this disc. It is rich, sonorous, and dramatic; ranging from aggressive almost percussive reedy sounding attacks to the gentlest of legato passages. His musician colleagues are equally compelling. The gut string guitar varies from warm and subtle expressions of gently plucked notes and harmonics to impressive scales and dramatic sonorous melodic passages. Occasionally the guitarist strikes the body of his instrument in various places creating diverse explosive percussion sounds that resonate like gun shots or the heel strikes of a Flamenco dancer. The piano reinforces the harmonic and rhythm structure of the works and frequently dramatically doubles the cello’s bass notes. The violin soars magnificently sometimes blending with the cello and sometimes standing out on its own in the mix. Finally, the bandoneon, perhaps the favorite instrument of the composer, acquires a hypnotic reedy quality that interweaves throughout the works lending melody, counterpoint, and emphatic rhythms like the hits played by a tight woodwind or sax section.

The recording is brilliant with the ensemble focused in a near-center cluster of instruments that overlap each other in the stereo image yet have slightly different places in the front-toback sound field. Aggressive but sophisticated use of multiple reverbs blend the sound in multiple directions creating a vibrant and hypnotic whole that takes the listener to a magical place. The IWISTAO/MARK HI-FI speakers project all of this acutely and make listening to “The Soul Of The Tango” an immensely rewarding experience.

  Listening  to  “but beautiful”  on  the

 IWISTAO/MARK  HI-FI  loudspeakers

Boz Scaggs, most thought of as a pop/R&B star in the eighties, has always demonstrated a flexible and adaptive musical talent. For some time he has focused on the jazz idiom and has become an impressive jazz vocalist in his own right. His exquisite CD “but beautiful” stole my heart the first time I listened to it and has remained a favorite ever since. It features him singing standards with a traditional jazz quartet of acoustic bass, drums, piano, and sax. All of the performances are breathtaking, and the recording quality is phenomenal in all respects. In particular the goal of this studio recording is to put the listener in a small live venue so that when you close your eyes you can hear the players so vividly you imagine you could almost reach out and touch them. The engineer and producer made an obvious decision to maintain the basic architecture of the mix throughout all selections so that the whole CD plays like an extended live concert. That mix strategy made this particular recording the ideal choice to complete my audition of the IWISTAO loudspeakers. It offers the chance to see how much of that sweet illusional live quality the speaker’s labyrinth return actually imparts to the sound.

All of the players on this recording are consummate masters. Every subtlety of each performance is revealed by these speakers: the finger noise of the bass strings being plucked, the breaths taken by the sax player, the subtle changes in brush strokes of the drummer, the multi-timbrel sound of the Turkish cymbals that resonate in growing waves, the exquisite chord substitutions and melodic counter melodies of the piano. These loudspeakers beautifully project all the instruments in the quartet as they co-mingle in a near perfect sonic tapestry.

The vocals are truly extraordinary. Boz

Skagg’s jazz singing reminds me a bit of Tony Bennet especially in his phrasing. His voice is not as gravelly as Mr. Bennet’s, though there is plenty of gravel when needed; but Skagg’s pitch is flawless (which I cannot say for Tony Bennet, much as I love his work). I know this because I was cursed from birth with absolute pitch and I know when someone is dead on perfect and when they aren’t. Boz is one of those artists who has that arrow in his quiver; but he also has wonderful emotional phrasing and interpretation which remains true to the melody and intent of the song at all times.    As talented and successful as he was in the genres of pop and R&B I think that Mr. Skaggs has in some ways reached the apex of his musical gifts in his work as a jazz singer. I loved this CD before I auditioned it over the IWISTAO speakers; but they helped me to come to know the album better and to love it even more.

As to that illusional “live sound” quality inherent in labyrinth speakers, it is there in just the correct amount - which is a very slight and subtle. It contributes to the audible sheen of the speakers without interfering with their accuracy.

Returning to the LOTH-X AURA speakers for comparison

I must confess that this part of the audition truly surprised me. Re-listening to the Boz

Skaggs CD played over the LOTH-X speakers was a shock. They sounded woody and boxy by comparison. They lacked high end definition, the stereo image and depth of field were less distinct.  They did seem to project more bottom end than the IWISTAO cabinets, but it seemed artificial and was most concentrated in the 150 - 200 Hz range.

Conclusion

The IWISTAO WHFSC-FR565WLC-6.5

Speaker cabinets loaded with MARK HI-FI 6.5” drivers are superb sound reproducers. They are hyper accurate, and very pleasing to listen to. The stereo imaging and depth of field are amazing especially for speakers in this price range. They are almost holographic in their sound projection. Because they are only available through direct purchase from the maker, the cost of the cabinets and the drivers are under $500.00 US. Because they come from China there is a delivery charge of $183.00 which is unfortunate but less than the retail mark up from an audio dealer.

One final comment which applies to the IWISTAO/MARK HI-FI speakers and other loudspeakers of similar size. They cannot be expected to reproduce frequencies below 50 Hz very noticeably. If that 20Hz - 50Hz range is important to you as a listener (and it is very important to me) I suggest coupling the speakers with a good subwoofer of at least 10” in diameter, and setting the low frequency shelf somewhere between 40Hz and 50Hz. I have done so with the IWISTAO loudspeakers and I am exceptionally pleased with the result. It adds that lower end punch from something like a kick drum that you feel through your stomach; and it does wonders to the growl of an acoustic bass. Again, this is not to distract from the performance of the speakers by themselves in any way; it is just a recommendation for those who enjoy the presence of the extreme lower end frequencies in their listening experience.

-------------------------------------------------------------------------------------------------------------------------------------

Below is the original JPG file from Dan Harrison

Review of IWISTAO WHFSC- FR565WLC-6.5 Speaker cabinets with MARK HI-FI 6.5” Metal Cone  DriversReview of IWISTAO WHFSC- FR565WLC-6.5 Speaker cabinets with MARK HI-FI 6.5” Metal Cone  Drivers 1Review of IWISTAO WHFSC- FR565WLC-6.5 Speaker cabinets with MARK HI-FI 6.5” Metal Cone  Drivers 2Review of IWISTAO WHFSC- FR565WLC-6.5 Speaker cabinets with MARK HI-FI 6.5” Metal Cone  Drivers 3

Tuesday, November 10, 2020

Let everything follow the wind from Black Voice Tube Preamplifier plus SE 6P1 Tube Amplifier

Let everything follow the wind from Black Voice Tube Preamplifier plus SE 6P1 Tube Amplifier



Let everything follow the wind, the song is Cantonese one, and it is played from a tube preamplifier with 6N3(replacement US GE5670) plus 6N5P ( replacement GE 6080), plus single-ended 6P1 tube amplifier. Also, the tube amplifier is a headphone amplifier with 1W output.

And the music sourcing from Bluetooth receiver that is Bluetooth 4.2 version CSR64215, which is connected wireless with the  virtual CD player of notebook played.


Friday, October 30, 2020

Yi Jian Mei -- Played by IWISTAO 6.5 Inch HIFI Labyrinth Speaker plus Matisse Tube Preamplifier

Yi Jian Mei -- Played by IWISTAO 6.5 Inch HIFI Labyrinth Speaker plus Matisse Tube Preamplifier


The song Yi Jian Mei played by CD Player + GE5670 Matisse Tube Preamplifier + 6P1 Parallel Class A Single-ended Tube Amplifier.

And the speakers are  IWISTAO 6.5 Inch HIFI Labyrinth Speakers with solid wood, which is made of solid wood, with double back guide pipe, and its return passage measured about 1.6 meters, and sound quality is relatively pure. Its panel can be replaced if you have spares. And the full range speaker unit is used Mark 6.5 inches full range CHN110.

More details, please find here 




Saturday, October 24, 2020

813 (FU-13) Vacuum Tube Amplifier Classical Diagram Circiut

 813 (FU-13) Vacuum Tube Amplifier Classical Diagram Circuit



Vacuum tube 813 belongs to antique one, which is a direct thermal beam shot tetrode with thorium tungsten cathode, graphite anode. In the radio equipment, it can be used for the oscillator power amplifier tubes, and its using frequencies are up to 30MC. When it is used as a power amplifier (such as Class AB), its output power is up to 300W or above, it is high reliable, excellent linearity, and not only does it perform tigers’ roaring and thunder exhaustive, but also can perform thin piano voice with detailed and delicate, it is the master of tube amplifier.



813 sound is very good, power and life are outstanding, air sense and sound field is far better than with that cannot be compared, you may not want to listen to small power output tube after listening tube 813. Due to its high power output, it can drive high power speakers that tube amplifier with lower output can't drive. It is the first choice to drive low-sensitivity, high-power and high-end speaker.







There are 813 (FU-13) Tube Amplifier Classical Diagram Circuits, only for your information.

More details, please find https://www.iwistao.com/products/vacuum-tube-813-shuguang-for-tube-amplifier-replace-fu13-high-power-output-quality-hifi-audio?_pos=1&_sid=d8f007fee&_ss=r

813 (FU-13) Tube Amplifier Classical Diagram Circiut





Wednesday, September 30, 2020

How to customize drilling the holes of your speaker cabinet

How to customize drilling the holes of your speaker cabinet


Sometime, we need drill the holes be suitable for the speaker cabinet, like as a through hole, and a countersunk hole, then you may fix your speaker unit into the cabinet. 

We use a machine to do them, come on, take a look that how it works. Also there are many empty speaker cabinets for your DIY, including full range speaker cabinets, 2 ways, 3 ways, and labyrinth, inverted, and so on. You only select that one is suitable for you, then fix it into the cabinet, connect your power amplifier to enjoy your favorite songs... 



Thursday, September 24, 2020

Same 4 inches full range speaker unit for different speaker cabinet.

Same 4 inches full range speaker unit for different speaker cabinet, they are all 
Labyrinth Structure from IWISTAO  speaker.



Tuesday, September 22, 2020

IWISTAO Single-ended Tube Amplifier 2X3.5W Class A 6N1 Drive 6P14 5Z4P Rectifier Scaffolding Soldering Solid Wood Casing

IWISTAO Single-ended Tube Amplifier 2X3.5W Class A 6N1 Drive 6P14 5Z4P Rectifier Scaffolding Soldering Solid Wood Casing AC115/220V


The  song  is Bury The Heart, from CD Player + IWISTAO P14 Single-ended Tube Amplifier + 4 inch Full Range Solid Wood Speaker .

Here, 6p14 is a commonly power output vacuum tube in the previous tube radios, with a gorgeous sound and mellow sound! Savor carefully, nostalgic thoughts emerge spontaneously. This unit is suitable for high-sensitivity small bookshelf speakers, and also very suitable for using as desktop audio and upgrade computer audio.
Since the tubes of all levels are working in Class A amplification, the distortion is small, its tone is sweet and soft.Its rated output power is 2x3.5w, but the actual undistorted output power is equivalent to 2x20w transistor power amplifier because the tube has the advantage of strong overload capability,


The casing is made of Sapele solid wood, which is medium-hardness wood that maintains original color and texture of the wood. The case is coated with environmentally friendly varnish and polished and painted many times. The texture is rich, simple and beautiful! The upper and lower top plates are painted iron plates. The advantage of using iron top and bottom plates relative to aluminum plates is that they can isolate some clutter interference. Flat proportional size, solid and steady, restrained in atmosphere. There is still space inside the casing, you can replace a larger oil-immersed capacitor, or it is convenient to rub the circuit!



More details, please find here below.

https://www.iwistao.com/collections/single-ended-tube-amp/products/iwistao-single-ended-tube-amplifier-2x3-5w-class-a-6n1-drive-6p14-5z4p-rectifier-scaffolding-soldering-solid-wood-case-115-220v?variant=31987631784051 https://www.iwistao.com/collections/hifi-speakers/products/iwistao-hifi-4-inch-full-range-speaker-solid-wood-1-pair-60w-4ohms-60hz-23khz-92db-max-akisui4-for-monitor-speakers-tube-amp https://www.iwistao.com/collections/cd-player/products/hifi-cd-player-with-dac-cs4398-192khz-24bit-high-quality-movement-upgrade-version-black-or-withe-panel-220v-audio


Saturday, September 19, 2020

Don't decorate your dreams from FU50 single-end tube amplifier

Don't decorate your dreams from Terence Tsoi

Foobar2000 player Win 10 + FU50 single-end tube amplifier + HIFI 2awy Speaker.
 



Advantages of single-ended class A tube amp are that sound is pure and delicate, high-frequency extension of natural human voice, strings are very attractive, especially in triode connection was the most prominent. Because the operating point is selected on the linear characteristic curve segment, nonlinear distortion is relatively small, even harmonic content is high, but also very good sound effects, sound quality is beautiful moist, sweet and pleasant, like as the taste of multi-harp. The unit adopts tube FU50 also called small 300B as power stage, natural and smooth, mellow voice, has a very strong tube taste with expectations.


Designed with a switch for 5 signal inputs, they are MM phono, CD / DVD drive, USB decoder, AUX line, MP3/PC. And designed independence channel to exclude interference between different inputs to ensure no matter what audio input, the unit will not be impacted by other audio input and sound. And you can choose the different signal source according to individual needs.


Wednesday, September 16, 2020

IWISTAO Tube Amp FU50 2x13W Triode Connection Class A Signal-ended MM Phono Headphone USB Decoder

IWISTAO Tube Amp FU50 2x13W Triode Connection Class A Signal-ended MM Phono Headphone USB Decoder




FU50 Tube Integration Amplifier + Transparent Speaker 3 Inch Full Range.


Advantages of single-ended class A tube amp are that sound is pure and delicate, high-frequency extension of natural human voice, strings are very attractive, especially in triode connection was the most prominent. Because the operating point is selected on the linear characteristic curve segment, nonlinear distortion is relatively small, even harmonic content is high, but also very good sound effects, sound quality is beautiful moist, sweet and pleasant, like as the taste of multi-harp. The unit adopts shuguang tubes KT100 as power stage, this tube is an improved version of famous tube KT88 sounds fine, natural and smooth, mellow voice, has a very strong tube taste with expectations.

Designed with a switch for 5 signal inputs, they are MM phono, CD / DVD drive, USB decoder, AUX line, MP3/PC. And designed independence channel to exclude interference between different inputs to ensure no matter what audio input, the unit will not be impacted by other audio input and sound. And you can choose the different signal source according to individual needs.



More Details, please find here,

https://www.iwistao.com/collections/single-ended-tube-amp/products/tube-amplifier-fu50-power-stage-2x13w-triode-connection-class-a-signal-ended-with-mm-phono-headphone-amp-usb-decoder-hifi-audio

https://www.iwistao.com/collections/hifi-speakers/products/iwistao-20w-hifi-2-75-inch-transparent-labyrinth-speaker-5mm-acrylic-plate-4-ohm-84db-1-pair-stereo-audio

Saturday, August 22, 2020

IWISTAO HIFI Power Amplifier 2x25W ClassA FET Single-ended Stereo Power Amp Whole Aluminum Casing Design

IWISTAO HIFI Amplifier 2x25W ClassA FET Single-ended Stereo Power Amp Whole Aluminum Casing Design With upc1237 Protection Black


It is a pure class A single-ended stereo power amplifier, which is a very high degree of completion HIFI amplifier, its sound is silky smoothness, also it is too appealing when you listen to the sound of strings and human voice with the unit, and this is definitely a warm sound amplifier, but unlike a little dim sound of tube amp, its sound is warm and detailed, while low dive control and damping is also very perfect.




As its 25W output power at 20 to 30 square meters or below space, both with book shelf speakers or floor speakers, it will have a good performance. Remarkably, its signal to noise ratio control very well, you will hardly hear a little noise when you put your ear to the speaker at deep night, although its power is increased to maximum, but the circuit design more rational, so it is still have higher SNR.




More details, please find here https://www.iwistao.com/collections/power-amplifiers/products/hifi-amplifier-2x25w-classa-fet-single-ended-passa30-stereo-power-amp-whole-aluminum-casing-design-with-upc1237-protection-black?variant=42725980428



 

Sunday, August 9, 2020

WIFI Radio Internet Web FM DBA Radios Bluetooth Speaker 5W RMS Color Screen Power Adaptor Supply Wooden Casing

WIFI Radio Internet Web FM DBA Radios Bluetooth Speaker 5W RMS Color Screen Power Adaptor Supply Wooden Casing

The casing of this WIFI Radio is made of wooden, so it can achieve better quality sound, support Aux in and earphone output.

Also it is a FM / DBA radio, and a Bluetoother speaker.



Support 17 languages operation: English/German/Spanish/French/Portuguese/Dutch/Italian/Russian/Swedish/Norwegian/Danish/Hungarian/Czech/Slovak/Polish/Turkish/ Finnish

Wireless Network: IEEE802.11b/g/n

Security Protocol: WEP/WPA/WPA2

FM frequency range: 87.5-108MHz

DAB frequency range: 174.928MHz (5A) - 239.200MHz (13F), support DAB and DAB+

Bluetooth: 2.1 + EDR

Power input: 12V 1A

Power voltage: 100-240V~50/60Hz

Audio output power: 5W (RMS) x 1

Audio sockets: 3.5mm earphone jack, 3.5mm Aux-in jack, 3.5mm Line out jack.

Unit Dimension: 220 x 114 x 120 mm (L x D x H)


More details, please find here

Monday, July 20, 2020

Vacuum Tube Amplifier 6H9C 5687 Drive WE 5D21

 Vacuum Tube Amplifier 6H9C 5687 Drive WE5D21


Tune a vacuum tube amplifier, it is tube 6H9C 5687 dive WE5D21



Monday, July 13, 2020

5.25 Inch Full Range Speaker Unit 25W Max 60hz-20KHZ 91dB Ferrite Magnetic 4/8 ohm Die-cast Aluminum Basin Frame

5.25 Inch Full Range Speaker Unit 25W Max 60hz-20KHZ 91dB Ferrite Magnetic 4/8 ohm Die-cast Aluminum Basin Frame




Features

1. Adopt high-performance ferrite magnet.

2. Adopts a symmetrical magnetic circuit structure with a copper cap (short circuit ring).

3. Full-range speakers are made of leather.

4.With die-cast aluminum basin

5. With oxygen-free copper gold-plated solder tabs.

6. Adopt high-end CONEX elastic wave and KAPTON voice coil

7. Large magnetic circuit or special magnetic circuit hardware are all special processing appearance of lathe processing.

Wednesday, June 17, 2020

IWISTAO HIFI 3 Inch Full Range Speaker Finished 1 Pair Solid Wood Labyrinth Structure

IWISTAO HIFI 3 Inch Full Range Speaker Finished 1 Pair Solid Wood Labyrinth Structure for Tube Amp


This speaker cabinet is made of solid wood. Built-in a labyrinth structure, it can enhance the low-frequency radiant energy, make low-frequency dive deeper, effectively overcoming insufficient bass of commend full range speaker cabinet, make the speaker cabinet the full-frequency be more full and rich.





Its magnetic circuit system adopts the neodymium iron boron rare earth strong magnetic structure plus short circuit copper bushing, which improves its performance of music details from starting point. The choice of the cone is more exhaustive, when it is determined to use aluminum as its sound basin, it begins to this thin aluminum material has been studied in various ways. If it is thicker, its rigidity will be better, but its resolution is poorer, in contrast if it is thinner, the resolution is better, but its rigidity will be poorer. Finally, it was decided to use a thin aluminum to improve the rigidity from the shape and depth anodizing treatment. The aluminum treated in this process is almost the same as ceramic. So, the sound quality is also going to a new level, whether it is bandwidth, details and transients have an ideal performance!



Saturday, June 6, 2020

IWISTAO Discrete Components Stereo FM Radio Board Electrical Tuning

IWISTAO Discrete Components Stereo FM Radio Board Electrical Tuning Decoding LA3401 TDA2030A Amplifier




(power supplied by battery)

This is a stereo FM radio finished board with discrete components. You only connect DC12V power adapter and speakers then you can enjoy wonderful FM radio. Or, you may make a wooden casing and DIY it as a vintage radio.

  
The FET is used for high-level discharge, and the triple-coupling is used to increase the AFC automatic frequency tracking circuit, which makes the receiving sensitivity more selective and increases the frequency display. The debugging is more intuitive.

The PCBA adopts double balanced proportional discriminator with excellent sound quality, and also optimizes its layout of the intermediate frequency circuit PCB, improves the stability of the intermediate frequency. And it uses a LA3401 decoding chip as FM stereo decoder, whose resolution is up to 70dB,its noise ratio is up to 95 dB. At the same time, a first-stage FM mixed signal preamplifier is added, which improve the problem that the LA3401 standard circuit cannot be driven in weak signal, so that each radio station can achieve good mediation resolution. After then, the LA3401 has no decoding noise and is comparable to the LA3450 chip.

The power amplifier part use two TDA2030A chips, its output power is larger, sound quality is pure and thick, clean and pure.

This is a PCBA bord, and you should connect a quality power supply as DC12V , don't use a switch power supply that interfere the radio signal receiving , you may use common linear power from power transformer. It is best if you can provide power form battery,please try it if available.



Tuesday, May 26, 2020

IWISTAO HIFI Full Range Speaker Aluminum Casing 2x25W NdFeB Magnetic 8 ohm 78Hz-19.8Khz

IWISTAO HIFI Full Range Speaker Aluminum Casing 2x25W NdFeB Magnetic 8 ohm 78Hz-19.8Khz



This speaker is a whole aluminum casing, with ultra-thick materials, precision CNC machining, and install a special developed 4-inch full-range speakers, low frequency is better than the same diameter (4 inch) speakers. The use of aluminum alloy cabinet has many advantages, that is, it will not peel off, aging, cracks, etc. unless it falls on the ground, and the life is almost unlimited. And its density is heavier than the wooden speaker, there will be better shock absorption effect and with the internal sound-absorbing cotton, and the low frequency will not diverge.


The speaker uses a 4-inch NdFeB strong magnetic unit. Its low-frequency density is very good, dynamically distinct, the high-frequency extension and air feel are better, and the human voice is sweeter. This uit, first of all, is a magnetic circuit system, tombarthite NdFeB magnetic structure plus a short-circuiting copper sleeve, which solves the thoroughness of medium-high frequency from the starting point. But the selection of cone is more painstaking, cone is mainly composed of bass and medium-high sound. After various screenings, cotton and linen fiber is selected finally. And, the treble must be rigid and soft, then the bamboo plus bark fiber is selected. Through countless trials and adjustments, the effect finally conquered out ears. The final results are that its medium-high frequency density is very good, very thorough, and the background is clean.






Saturday, May 16, 2020

DIY 300B Vacuum Tube Amplifier with IWISTAO Amorphous 8C Core Output Transformer

DIY 300B Vacuum Tube Amplifier with IWISTAO Amorphous 8C Core Output Transformer

There is a video that is 300B Vacuum Tube Amplifier, which is used IWISTAO Amorphous 8C Core Output Transformer.



You may find IWISTAO Amorphous 8C Core Output Transformer here for more details.


Friday, May 8, 2020

IWISTAO HIFI Labyrinth 4.5 Inch Full Range Empty Speaker Cabinet Solid Wood 15mm Thickness Board


IWISTAO HIFI Labyrinth 4.5 Inch Full Range Empty Speaker Cabinet Solid Wood 15mm Thickness Board


This is a labyrinth empty enclosure that is made of poplar plywood or solid wood, the veneer of poplar plywood has natural tree branches texture and wood knots and has a natural beauty,





As you know, the greater the material density of the speaker enclosure, the less the vibration produced by the enclosure. Solid wood is more reflective of sound than other materials, and tightness of the wood is higher, and the sound can be effectively expressed by the vibration of the air inside the box. We often say that the sound of wooden speakers is warm, in fact, the word warm means the balance of tri-band that are low, medium and high frequency; if the frequency is too low or too high, it will make people feel uncomfortable. The advantage of wooden speaker is that its playback effect is good, the vibration of the sound inside the box is stable, and the sound effect will be balanced and full.



Friday, April 17, 2020

IWISTAO 2X12W HIFI Tube Amplifier 6N1x2 Preamp 6P1x4 Class A + 4 Inch Fu...

IWISTAO 2X12W HIFI Tube Amplifier 6N1x2 Preamp 6P1x4 Class A Pull Push Amplifier Circuit plus HIFI 4 Inch Full Range Speaker with Red Cabinet

Sunday, March 22, 2020

How Dusk mask is made by automatic machine?

How Dusk mask is made by automatic machine?


  • Safety protection, dust filtering up to 95.
  • Keep healthy and breathe at ease. Three-dimensional cutting, high-adhesion fit to the face design, better sealing, safer to wear.
  • 4-layer protection, high filtration efficiency.
  • Plastic aluminum nose clip for better fit. It is more comfortable to wear and prevents air from flowing from the side of the bridge of the nose, giving you double protection.
  • Ultrasonic high-quality spot welding, firm and anti-detachment, effectively protect the filter layer.
  • A functional nose pad design that prevents fogging and isolates the outside air.
  • Triple structures design for long-time wearing and comfortable skin.
  • Elastic band ear hook for easy stretch wear.


Saturday, March 7, 2020

IWISTAO HIFI 3 Inch Full Range Speaker 2 x 15W Whole Aluminum Casing

IWISTAO HIFI 3 Inch Full Range Speaker 2 x 15W Computer speaker Whole Aluminum Casing


It is All-aluminum casing and Ultra-thick material with precision CNC machining by independently developed. Choose a large magnetic 3 inch HIFI full range speaker unit, exquisite and compact, beautiful and generous




The system includes HIFI music player from iPhone 5s plus a tube Bluetooth 5.0 CSR8675 decoder plus a pair of FU50 tube amplifier, then plus a pair of 3 Inch Full Range Speakers.

More details, please find here
https://www.iwistao.com/collections/hifi-speakers/products/iwistao-hifi-3-inch-full-range-speaker-1-pair-2-x-15w-computer-speaker-whole-aluminum-casing-audio?variant=14136068341875


Wednesday, February 26, 2020

IWISTAO HIFI 3 Inches Full Range Speaker Solid Wood Labyrinth Structure for Tube Amplifier

IWISTAO HIFI 3 Inches Full Range Speaker Finished 1 Pair Solid Wood Labyrinth Structure for Tube Amplifier





This speaker cabinet is made of solid wood. Built-in a labyrinth structure, it can enhance the low-frequency radiant energy, make low-frequency dive deeper, effectively overcoming insufficient bass of commend full range speaker cabinet, make the speaker cabinet the full-frequency be more full and rich.


As you know, the greater the material density of the speaker enclosure, the less the vibration produced by the enclosure. Solid wood is more reflective of sound than other materials, and tightness of the wood is higher, and the sound can be effectively expressed by the vibration of the air inside the box. We often say that the sound of wooden speakers is warm, in fact, the word warm means the balance of tri-band that are low, medium and high frequency; if the frequency is too low or too high, it will make people feel uncomfortable. The advantage of wooden speaker is that its playback effect is good, the vibration of the sound inside the box is stable, and the sound effect will be balanced and full.


Its magnetic circuit system of speaker unit adopts the neodymium iron boron rare earth strong magnetic structure plus short circuit copper bushing, which improves its performance of music details from starting point. The choice of the cone is more exhaustive, when it is determined to use aluminum as its sound basin, it begins to this thin aluminum material has been studied in various ways. If it is thicker, its rigidity will be better, but its resolution is poorer, in contrast if it is thinner, the resolution is better, but its rigidity will be poorer. Finally, it was decided to use a thin aluminum to improve the rigidity from the shape and depth anodizing treatment. The aluminum treated in this process is almost the same as ceramic. So, the sound quality is also going to a new level, whether it is bandwidth, details and transients have an ideal performance!












Sunday, January 19, 2020

2 x 80W HIFI Hybrid Amplifier Vacuum Tube Matisse Circuit Preamplifier Pure FET Power Stage Tube Rectifier

2 x 80W HIFI Hybrid Amplifier Vacuum Tube Matisse Circuit Preamplifier Pure FET Power Stage Tube Rectifier 


It is a hybrid amplifier with tube and FET mixed, which has both vacuum tube sweet and moist, fine transparent flavor, but also has the strength and speed of transistor power amplifier, hardness and softness, totally natural. The unit then resume the models production again which has evaluated by Electronic Journal. After optimized and improved, compared with the original unit, it is elegant and dignified appearance, extraordinary taste, excellent sound quality, it got high positive feedbacks fully from customers.













  1. 4 groups of signals input switching.
  2. Built-in a power switch for 110V and 220V to accommodate different national voltage standard
  3. Adopted preamplifier and power stage designing independently, interior layout is reasonable, clean and beautiful.
  4. 7mm thick aluminum front panel drawing process with black, silver optional.
  5. Advanced matte paint technology sheet steel cabinet, with high-gloss metal knobs, cellular cushions.
  6. Red light flashing when pre-heat, the light turn into blue after pre-heat.
  7. Adopted large-current relay delay with mute switch, the midpoint potential drift, overcurrent protection, to avoid damage to your expensive speakers.
  8. Adopted gold-plated RCA connectors for inputs, with high-grade amber gold-plated oxidation terminals for outputs.
  9. With three plug socket, it is easy to replace it with high-grade power cord.
  10. Adopted ALPS 27 type blue shell sealed volume potentiometers.
  11. Coupling capacitors are used in Germany or the German ERO WIMA polypropylene capacitors and other imported one.
  12. Used 300W toroidal transformer power supply, adequate power, low radiation.
  13. Adopted imported fast rectifier bridge, and 4 pcs imported 10000u filter capacitors.
  14. Adopted lower heat resistance of aluminum blackened large comb-shaped radiator low power tube wear.
  15. Adopted Hita chi Genuine FET power tube, good sound quality, stable!