In these days, various music devices such as portable audio players have diversified the ways to enjoy music, nevertheless, the richness in daily life that we can feel from the sound produced from vacuum tube amplifiers is now being re-evaluated.
TU-882R Vacuum tube stereo headphone amplifier was developed to share such joy of vacuum tube sound from a digital sound source with its users without being influenced by the surroundings.
The mechanical specification is as rich as the sound it produces.
A number of input/output terminals are available; 3 levels of headphone output terminals (LOW, MIDDLE, and HIGH) that allow you to use any commercially available headphones, and an input priority terminal at the front panel, and on the back side, a loop-through output terminal that outputs the input signals as they are.
For the coupling capacitor, a non-inductive PP film capacitor with excellent electric characteristics in non-inductive construction, and OS-CON (organic semiconductor capacitor) for the cathode bypass.
Moreover, the power transformer has a magnetic flux leakage reducing configuration.
Also, the shield panel is installed in a special way so that the the influence to other surrounding parts and components is minimized to produce the best quality sound.
With all these features, we hope you enjoy the pleasant sound of TU-882R Vacuum tube stereo headphone amplifier.
Everyone can enjoy assembling this PCB assembled kit with ease —soldering is not required!
TU-882AS - Step by Step Assembly Guide
Vacuum tube / 5670W x 2
Rated output / 200mW(RL＝6Ω or 32Ω or 600Ω)
Output impedance / LOW 4～20Ω、MID 20～100Ω、HIGH 100～1kΩ
Rate input / 400mV
Input resistance / 50kΩ
Frequency response / 20Hz～50kHz
S/N 102dB(IEC WEIGHTING)
Voltage / AC120V 50/60Hz
Dimension / W130×H120×D250mm
Power consumption / 10W
Weight / 2.4kg
TU-882R (120V) $360.00 (kit)
TU-882AS (120V) $400.00 (PCB assembled)
TU-882AS (230V) $440.00
▲PCB assembled and accessories
Necessary Tools
- Long nose pliers
- Screw driver ( No.2)
- Scissors
You will find it unnecessary to solder this TU882AS kit. It's a PCB assembled kit.
Connect one side of the jumper cable to the main board (PCB-A connector), 
With the one side still connected to the main board (PCB-A), horizontally connect the other side of the jumper cable to the inside of the Headphone Jack plug (PCB-C connector).
Install a hex-head spacer to the main chassis.
Install the main board (PCB-A) to the main chassis 
Now place the power supply unit (PCB-D) on the outside top part of the chassis. Attach the four connectors from the main board (PCB-A) to the power supply unit (PCB-D). 
Place the transformer cover on top of the power supply unit. 
Install the four insulators to the bottom of the chassis.
Install the front panel and volume knob.
Insert the vacuum tube 5670(W) into the socket.
Install the protector for the vacuum tube.
Congratulations!
You are now complete.
Now, plug your favorite headphones into the amplifier and enjoy the excellent sound produced by the vacuum tube amplifier.
