Tube Earphone Amplifier 12 ~ 600 ohms Russian 6922H Pre-amp Class A Amp HIFI Constant Current Simple No Casing Audio DIY High Quality
Online Store of WISTAO HIFI BLUETOOTH AUDIO
Sunday, November 24, 2019
Tube Earphone Amplifier 12 ~ 600 ohms Russian 6922H Pre-amp Class A Amp HIFI Constant Current Simple No Casing Audio DIY High Quality
Thursday, October 10, 2019
IWISTAO 2X300W HIFI Stereo Discrete Component Power Amplifier Finished Board High Power Differential Amplification Input WY2963/WK5688 Output
This is a stereo high-power finished PCBA power amplifier board which is made of discrete components, and its maximum power is up to 300W+300W.
The input stage adopts American power differential transistors and medium power one for differential amplification to make its sound pure and soft. The output stage adopts 6 pairs of US WY2963/WK5688 power pair transistors, and 2 pcs high-precision temperature compensation one with constant current amplification designing, let its sound is more beautiful and delicate and sweet; And, the protection circuit uses imported Omron relay; RC component uses high-precision fever components to ensure the consistency of the materials used in the whole unit.
More details, please find https://www.iwistao.com/products/iwistao-2x300w-hifi-stereo-discrete-component-power-amplifier-finished-board-differential-amplification-input-wy2963-wk5688-outp
Thursday, September 26, 2019
IWISTAO Finished Tube FM Stereo Tuner Stainless Steel Chassis
WISTAO Finished Tube FM Stereo Tuner Stainless Steel Chassis Black Aluminum Panel HIFI Audio 110V/220V
This unit is a typical superheterodyne radio. It adopts a whole circuit board design that include high frequency receiving, intermediate frequency amplification, limiting, frequency discrimination, stereo decoding, preamplification, etc. The output is stereo signal. It can be connected with various types of tube power amplifiers, active speakers, stereo equalization amplifiers and other equipments.
The specific circuit configuration is as below, high frequency receiving adopts double triode 6N3 for high frequency amplification and mixer amplification, and double triode 6N1 for local oscillation. The IF amplification uses a two-stage pentode 6K4, two-stage limiting, and a pentode 6J4. Phase frequency discrimination, stereo decoding uses TA7343, the decoded audio signal is switched to the double triode 6N2, and then the signal output to preamplification with a 5 times gain.
It is made of stainless steel chassis with black, and the front panel with 8mm thick aluminum plate. On the front panel, there are dual level meters to display audio signal level, and the digital frequency meter display FM reception frequency. Electronic tube with a modern digital frequency meter that is complementing each other with nice, classical and elegant style, maybe the frequency display board of the wireless receiver is the designer's wisdom. The right corner of the unit has a knob to manually tune the radio. All tubes are exposed at the top plate for heat dissipation purpose, and equipped with cat eye indicator behind the front panel. The whole structure of the tuner is compact, components layout had been optimized to be more reasonable.
Tuesday, September 17, 2019
IWISTAO 300B Output Transformer C Type Single-ended British Amorphous 8C Advanced Core Pr 3.5K
300B Output Transformer C Type Single-ended British Amorphous 8C Advanced Core Pr 3.5K Se 0-4-8 ohms
This 300B single-ended output transformer uses British amorphous high-grade C-type iron core that has a unique advantage, especially when he static operating point is 80ma or below , it can give full play to the advantages of the output transformer. After actual measurement and listening, the voice is very vivid, clear, low-frequency tension is very balanced in three bands, excellent permeability and atmosphere feeling
Using high-quality enameled wire, lamination process, CNC drying, vacuum impregnation, well-designed 8C structure, to design to a perfect coefficient.
It is a better choice to tube amplifier audiophiles. Also, there is a matched power transformer.
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| 300B Output Transformer C Type Single-ended Amorphous 8C 3.5K Plus Power Transformer |
Here is the 300B tube amplifier.
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300B Single-ended Class A 2X8W Tube Amplifier British Amorphous 8C Advanced Core Output Transformer |
Thursday, September 5, 2019
IWISTAO Bluetooth Speaker Handmade Vintage Pure Solid Wood 2x15W AUX U Disk MP3 WAV FLAC
If you are tired the Bluetooth speaker by mass production and want to find a unique Bluetooth speaker with good sound quality, you can come here to check it out.
The cabinet is made of 13MM thick sandalwood board with high density and rigidity. The panel is made of 8MM thick oak board with sharp texture and good toughness. Its structure is embedded with 45° angled slot and has high stability. It achieves a 400-mesh surface treatment and is coated with wood wax oil to maintain its natural color, feel good and easy to care.
Handmade products are more or less awkward and cannot be compared to the products produced by assembly line. If you are a perfectionist, this speaker may not be suitable for you.
Tuesday, August 20, 2019
IWISTAO HIFI Empty Wood Horn Solid 1 Pair Treble Compensation for Full Range Matched Fostex FT17H Horn
IWISTAO HIFI Empty Wood Horn Solid 1 Pair Treble Compensation for Full Range Matched Fostex FT17H Horn
This is a pair of empty solid wood horns. It can be used with the original Fostex FT17H horn super tweeter. The unit is equipped with a wooden horn to make the treble more efficient and better. It is placed on the top of the speaker and is equipped with a full-range horn as a treble compensation
Fostex FT17H horn super tweeter and large speaker (full range speaker or subwoofer) in parallel 2.2UF stepless audio capacitor and capacitor in series with the treble positive.The big horn speaker plus the horn is the right way if available. After listening to it, you may never hear the small speaker cabinet again.
Wednesday, July 31, 2019
IWISTAO Passive Preamplifier Kit Unbalanced to Balanced/RCA to XLR/Signa...
IWISTAO Passive Preamplifier Kit Unbalanced to Balanced/RCA to XLR/Signal Input Transformer
When you use your mobile phone or computer to listen to music, you will find that the sound is small, the details are small, and the dynamic is thin, their sound quality aren’t full and pleasant like as CD player, decoder. This is because the output value of mobile phone and computer is 0.2-0.5V audio voltage only, while the existing power amplifier is generally designed with an input voltage of 0.75-1.2V. This intermediate voltage difference requires a 2x amplification boost value. Now the 1:2 signal boosting transformer solves this disadvantage.
1:2 signal boosting transformer, balance transformer, and inverter transformer, that is a passive boosting transformer developed to compensate for low signal output of computers and mobile audio sources in the existing market. Make the ordinary sound source close to the effect of CD player signal one. And, if CD player connected the signal boosting transformer to power amplifier, its sound will be even more powerful. After the audio signal pass the boosting transformer and amplify, it will output a stable impedance, it will lead to its signal transmission is fidelity, and its sound field positioning is better!
More details, please find here
https://www.iwistao.com/products/iwistao-passive-preamplifier-kits-no-assembled-unbalanced-to-balanced-balanced-to-unbalanced-rca-to-xlr-signal-transformer?variant=29180982820979
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