Bass preamp, zero watts amplifier, speaker simulation, 3-band EQ, XLR-DI-Out, Aux-In, headphone jack

Preamp for electric guitar, "Zero Watt Amplifier" circuit, two channels, reverb, speaker simulation

DSM & Humboldt Simplifier Bass Master Preamp/DI-Box for electric bass with 4-band EQ, CabSim and versatile routing options.

DSM Humboldt Dumblifier; analog overdrive/preamp with two channels, preamp boost, with approx. +10dB, stereo cab sim & DI out.