Aguilar OBP-3TK - onboard bass preamp with separate pots for bass, mid and treble plus mini-switch for mid frequency. +/-18dB for bass (40Hz), +/-16dB for mid (400 or 800Hz) and +/-16dB for treble (6.5kHz).
Sadowsky Onboard Bass Preamp (4-Knob System), prewired onboard bass preamp for J-style basses with metal control plate, active preamp for passive pickups, 4-knob layout with controls for Master Volume / Balance /...
Darkglass Tone Capsule Bass Preamp, offers the transparency of the Microtubes B7K EQ in an onboard pre-amp, controls: Bass +-12dB @70Hz - Mids +-12dB @500Hz - Hi Mids +-12dB 2.8kHz, Pots included, The Tone Capsule...
Glockenklang 3-Band Electronic Preamp With 4 Potentiometers - active/passive switch (push/pull on volume control), balance control without volume reduction at mid position, treble control (+/-18dB @ 18kHz), bass...