IWISTAO FM LA3401 Single Decoding Board

 IWISTAO FM Single Decoding Board Mono to Stereo LA3401 Connect Intermediate Frequency Amplifier

The LA3401 is a multifunctional MPX demodulator IC designed for FM stereo electronic tuning. It features the VCO non-adjusting function that eliminates the need to adjust free-running frequency of VCO and the accessory functions such as FM/AM input, FM/AM input changeover, muting.

This LA3401 FM decoder board use audio advanced components, the effect is good. You can use it to decode the mono single from the tube intermediate frequency amplifier board to stereo one. 

This board kit is suitable for retrofitting radios, radio frequency plus stereo.

There are some photos for retrofitting an old Philips tube FM tuner below. After retrofitting, the sound is incredible, no distortion, no noise, perfect channel separation, a perfect high class Hifi tuner coming back.

 

 More details, please find here,

IWISTAO FM Single Decoding Board Mono to Stereo LA3401 Connect to IF Amplifier HIFI Audio DIY

DIY Transistor Power Amplifier PCBA Plus Preamp

DIY Transistor Power Amplifier PCBA Plus Preamp

This whole power amplifier and preamp is made of transistors, and its sound is more musical, mellow and rich from the man's voice...

Mono Transistor Power Amplifier

The video demo 2 channels HIFI Mono Transistor Power Amplifier + IWISTAO HIFI stereo 6.5 inch 2 ways speaker cabinets , the music source from HIFI CD player.

IWISTAO Tube Amp Class A SE 6G2P Drive 6P6P Bamboo Casing + 4 Inch Full ...

IWISTAO Tube Amp Class A SE 6G2P Drive 6P6P Bamboo Casing + 4 Inch Full Range Bamboo Speaker Cabinet

Tube 6p6p (or 6v6) is specifically designed and developed power output tube for the audio field, sound performance had been proved since it hit market, whenever savored carefully, nostalgic thoughts immediately felt.

Make this power amplifier is based on the classic circuit of 6p6p (6v6) power tube, and we select HIFI components and parts to create this Class A single-ended tube amplifier, sound satisfactory by users, we would like to share it with all fans!

Also the 4 inch full range speaker cabinet is made of bamboo.

The music source of demo video came from desktop music player foobar2000, and the notebook is connected with a Bluetooth 4.2 receiver with vacuum tube 12au7 as a buffer.

The Moon Represents My Heart from IWISTAO 3 inch Range Speaker Solid Wood Labyrinth Cabinet

The Moon Represents My Heart from IWISTAO 3 inch Range Speaker Solid Wood Labyrinth Cabinet

Man voice of The Moon Represents My Heart from  IWISTAO 3 inch Range Speaker Solid Wood Labyrinth Cabinet

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.

Also, there are 2 demo videos for the middle and bottom speaker, but they were drove by two difference type preamplifier.

The middle with a  6080 tube preamplifer

The bottom with a passive preamplifier

Their cabinets are labyrinth structure but also there are some differences as below.

The up's structure as below, and the left is for 3 inch full range speaker unit (the right is for 4 inch one).

The middle's structure as below, and the left is for 4 inch full range speaker unit (the right is for 3 inch one).

More details, please find here

The up,

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

The middle

IWISTAO HIFI 4 Inch Full Range Labyrinth Speaker 2x60W 4Ohms 92dB Max AKISUI4 

The bottom

IWISTAO HIFI 4 Inches Full Range Labyrinth Speaker Cabinet Bamboo 2x60W Max 70Hz-22KHz 89dB