PVA, passive voltage amplifier.

Designed to be used between music source and tube amplifier high impedance input/s.

Music source/s low output impedance's like CD players, computer headphone output/s, smart phone headphone output and the like.

Dual volume control is used to control volume.

Gain is determined by source impedance of music device used.

Overall gain is same as most line pre-amps.

Application notes and schematics included.

Input impedance range is 50-600 ohms.

Output impedance is set for normal amplifier inputs.

Bandwidth to 50K loading, -1db 20hz to 65khz.

Distortion at 3v output is less than 1% at 2khz.