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Details：
New and improved version, adding filament suspension circuit, better circuit performance, overall improvement of signal-to-noise ratio and tube's life.
Work voltage：AC115V and AC230V optional
Tube model：shuangguang 12AU7 *2
Size：320x92x308MM (W*H*D) expect RCA and knob
Net weight：about 5.5kg
Power supply: 50W Oxygen-free copper R-core transformer
Low noise: about 1mV output
Delay：45 seconds
Color：full black
4 way audio input + 1 way audio output
Full aluminum chassis
Gold copper RCA
Stainless steel switch
Refer Conrad-Johnson PV12L Circuit ，the sound is very good ！
Remote control volume control board:
128-level relay pure resistance shunt control
The input and output impedance is constant, the step is 0.5db, and the total attenuation is 63.5dB.
The resistance adopts American DALE/VISHAY
precision resistance
4 ways audio input options
1 way audio output
Remote control function:
Power on/off
Input choose
Adjust volume
Mute
Memory
One key return
Encoder function:
Press the power switch on the left encoder, and rotate the audio input left and right.
Press the right encoder to mute, and rotate the volume left and right.
Resistance:default 50K，can provide 100K,if need ,pls add a note !
Display：default red ，also can provide blue ，if need ，pls add a note ！
Package include:
Finished PV12L preamplifier x 1
Remote x 1 (no battery)
Not included AC power cord
