IWISTAO Blog is the official platform of IWISTAO HIFI MINIMART, dedicated to high-fidelity audio and DIY electronics. We focus on tube amplifiers, output and power transformers, speaker enclosures, and Bluetooth audio technologies, including HiFi Bluetooth speakers, headphones, and tube-based acoustic systems. The blog shares product insights, technical knowledge, and practical guides for audiophiles and audio builders worldwide.
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.
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.
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.
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.
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.
