Friend Don't Cry from IWISTAO 5.25 Inch Coaxial Speaker LS50

Friend Don't Cry from IWISTAO 5.25 Inch Coaxial Speaker LS50

This is a 5.25 inch coaxial empty speaker cabinet with solid wood. Exquisite craftsmanship, pure sound quality, high density and strong anti-resonance ability.

For the empty speaker cabinet, please click here,

https://iwistao.com/products/iwistao-5-25-inch-coaxial-empty-cabinet-solid-wood-back-inverted-no-including-speaker-unit-ls50-hifi-diy-audio

IWISTAO HIFI 8 Inch Full Range Speaker Empty Cabinet 1 Pair Finished Wood Labyrinth Structure Blank Version for Tube Amp

 IWISTAO HIFI 8 Inch Full Range Speaker Empty Cabinet 1 Pair Finished Wood Labyrinth Structure Blank Version 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 empty speaker cabinet, please find here.

https://iwistao.com/products/iwistao-hifi-3-8-inch-full-range-speaker-empty-cabinet-1-pair-finished-wood-labyrinth-structure-blank-version-for-tube-amp

IWISTAO HIFI Bluetooth 5.1 Stereo Decoder Qualcomm QCC5125 Hardware Decoding Bluetooth Optical Inputs APT-HD LDAC

 IWISTAO HIFI Bluetooth 5.1 Stereo Decoder Qualcomm QCC5125 Hardware Decoding Bluetooth Optical Inputs APT-HD LDAC

Overall sound performance of this decoder is full of simulation, its vocals are rich in emotion, and the performance of slow music is also very good, full of vinyl flavor.

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https://iwistao.com/products/iwistao-hifi-bluetooth-5-1-stereo-decoder-qualcomm-qcc5125-hardware-d

IWISTAO FU29 vacuum tube pull push amplifier with Bluetooth wireless connection

IWISTAO FU29 vacuum tube pull push amplifier with Bluetooth wireless connection

This FU29 vacuum tube named FY29 in Russian, and named 829B in American. It is a composite vacuum tube in which two Cambodian tetrodes are packaged in a same glass shell. It is generally used in power amplifiers with push-pull output, which can reduce tube selection and matching trouble. FU29 filament voltage is 6.3V, current is 2.25A, screen voltage is 600V, curtain grid voltage is 200V, zero letter screen current is 40mA, full letter current is 110mA. The grid bias voltage is -18V, the optimal load impedance from the screen to the screen grid is 13750Ω, and the output power (effective value) reaches 44W when the signal is full. In order to further simplify the circuit, this unit uses a composite tube 6N2 for preamplification and phase inversion, so that a single channel can use 6N2 and a FU29 to complete the power amplifier task, and it has 40W power output.

 It is small in size, unique in shape, but strong in driving force. Do not use the power of general transistors or digital power amplifiers to analogize the actual driving force of this tube power amplifier, because the high supply voltage and unique output transformer’s structure, its output internal resistance change for high and low frequency signals is relatively small, and it has a good low frequency driving ability. And the sound is soft and smooth, warm and delicate. 

This is why the tube amplifier has not been completely replaced after the emergence of many new technologies. 

👇👇👇 

https://iwistao.com/products/iwistao-2x40w-vacuum-tube-amplifier-fu29-power-stage-6n2-preamp-bluetooth-5-0-whole-aluminum-chassis

How to make a IWISTAO HDF board empty speaker cabinet?

The video demo the manufacturing process for IWISTAO empty speaker cabinet made of HDF board. Step by step as below. 1. Smooth cutting with uniform density board 2. Precise hole cut by CNC 3. Environmentally friendly woodworking glue 4. Strong and durable enclosure with air nail reinforcement 5. Rosewood grain leather, all hand-painted