1.Every tube is best placed after testing, please do not change its position, or tone quality will be affected.

2.Two units to achieve full balance.

3.WIMA Cap and the white coupling Cap are used units.

4.The circuit is designed refer to American Audio research LS22, with two balanced single

channels.

Function features:

1.Alternative power supply upgrade kit (refer to power supply black box customized for German octave tube.

2.Potentiometer is stepping ALPS27 (with built-in precision resistor) made in China, it can get more precise volume control when two balanced single channels are set.

3.Shielding board is placed between PC board and transformer.

4.The unique relay input select circuit avoids crosstalk between other channels and the current one (many devices have crosstalk).

5.Output delay can avoid DC output shock.

6.OPAMP server works when it is in high voltage, MOSFET for voltage stabilization, so it has low operating temperature, high speed, quieter background and better tone replay.

7.Meter can be off.

8.Electron-tube heater can be switched between AC and DC.

9.High frequency & low frequency can be adjusted, which also can be turned off (by relay). The circuit cleans the fuzzy bass and the high frequency harsh noise.

10.In power supply the electrolytic Caps and red WIMA Caps are same as the Branded unit's parameters, the sound quality is neutral and balanced.

11.Transformer: Japan zll EI86 ferrite core @ 90W.

12.Enclosure: Aluminum,430*330*100mm, with meter, 10KG, designed without screws on the top, with big radius, laser inscription.

13.Standard tube: 6N11 tube X4 made in China, E88CC, 6922 can be replaced.

14.Output: 2*RCA + 1*Mono balanced.

15.Input: 1*Mono balanced + 3*RCA.

Specification:

S/N: Electro-tube heater, @95dB/DC (2V output), @88dB/AC (2V output)

Amplification: x6.5

Freq. response:16Hz-100kHz (plusmn0.5dB）

Low frequency adjustment:50Hzplusmn6.5dB

High frequency adjustment:15kHzplusmn6.5dB

Input impedance:100K Ohms

Output impedance:200 Ohms

Max output voltage: 22V RMS

THD: 0.2% (meter off, no negative feedback)