IVP

Preamp

Overdrive

Intersound IVP "Tube Voice" preamp clone. Active 2-band pre-distortion EQ, transformer-based clipping.

The IVP clones the Intersound Instrument Voicing Preamp's "Tube Voice" circuit, a rackmount preamp stripped down to pedal format. A small transformer and uncommon transistor set provide bandwidth-limited clipping with harmonic saturation.

The 2-band active EQ (Bass, Treble) sits before the gain stage, shaping what hits the clipping circuit. Wider EQ sweep and slightly more gain than the original. 30mA draw, accepts 9-12V DC center-negative.