Bass Player Readers' Choice Award for Best Preamp: Audere JZ3              Bass Player Editors' Award
Introducing Jazz Hum and Noise Cancelling Preamps - keep the Single Coil Tone and Touch Response - lose the Hum and Noise              BP Magazine Review
ZMode Switch

Output Jack drawing

3ZB Drawings and Wiring Documents

The 3ZB Preamps have been replaced by the Pro Z preamps.

General Wiring Instructions for all configurations 2 pages 8.5x14 (legal) tri-folded.
A copy of this document is shipped with each 3ZB preamp.

If you want more detail below are links to our older set of the instructions.
This is probably longer than most players or installers want to read...
Old Version Wiring Instructions 9 pages 8.5x11 (letter).
Example Installation including adding shielding to the cavity of an electric bass.

Wiring Diagrams:

We ship the preamp configured and pre-wired, as specified in your order.
These drawings are provided in case you want to change/update your configuration later.

These are the base configurations - each drawing covers the additional user specified customizations including stacked controls, and single or dual batteries.

Configurations for Single Pickup
Volume, No EQ
Volume, 4 Band EQ
Volume, 2 or 3 Band EQ, optional Mid Freq Sw

Configurations for Single Pickup with Active/Passive Switch
Volume, No EQ
Volume, No EQ, Tone
Volume, 4 Band EQ
Volume, 4 Band EQ, Tone
Volume, 2 or 3 Band EQ, optional Mid Freq Sw
Volume, 2 or 3 Band EQ, optional Mid Freq Sw, Tone

Configurations for Dual Pickups
With Volume, Volume controls
Volume Volume, No EQ
Volume Volume, 4 Band EQ
Volume Volume, 2 or 3 Band EQ, optional Mid Freq Sw

With Volume, Balance controls
Volume Balance, No EQ
Volume Balance, 4 Band EQ
Volume Balance, 2 or 3 Band EQ, optional Mid Freq Sw

Configurations for Dual Pickups with Active/Passive Switch
With Volume, Volume controls
Volume Volume, No EQ
Volume Volume, No EQ, Tone
Volume Volume, 4 Band EQ
Volume Volume, 4 Band EQ, Tone
Volume Volume, 2 or 3 Band EQ, optional Mid Freq Sw
Volume Volume, 2 or 3 Band EQ, optional Mid Freq Sw, Tone

With Volume, Balance controls
Volume Balance, No EQ
Volume Balance, No EQ, Tone
Volume Balance, 4 Band EQ
Volume Balance, 4 Band EQ, Tone
Volume Balance, 2 or 3 Band EQ, optional Mid Freq Sw
Volume Balance, 2 or 3 Band EQ, optional Mid Freq Sw, Tone

Mechanical Drawings:

A dimensioned drawing of the potentiometers, switches, output jacks and LED.
Mechanical Drawings