More and more audiophiles are discovering the benefits of passive preamps. Why? Because more often than not, a passive preamp does the essential job of a preamp (input switching and controlling volume) while doing the least amount of harm to the audio signal.

Zero Gain Passive Line Preamplifier
Preamp doesn’t have Volume potentiometer.
It has micro-controller and it execute all functions.
Each time when you move rotary encoder knob it gives
a signal to micro-controller and it switches different resistors (DALE 1%) for Volume and Balance or switch input relays or power relay.
This configuration gives Zero distortions and Zero phase shifting.
The result is No sound colorations.