Custom Bass Preamp ModulusMK - Agusa

Tech 21 SansAmp Character Series VT Bass V2 Guitar Effect Pedal Preamp

Ampeg Classic Analog Bass Preamp Pedal

Electro Harmonix EHX Nano Battalion Bass Preamp Overdrive Guitar Effects Pedal

P.o.B custom handwired pedals and amps Tigris tube preamp for bass and guitar

Electro-Harmonix Bass Metaphors Bass Guitar Preamp Channel Strip Unit Only

Ampeg SGT-DI Bass Guitar Preamp DI pedal - Compressor/Eq/Overdrive w/box & PSU

MXR M81 Bass Preamp Power Amplifier 3-band EQ Studio-quality Direct Out