Selecting a London Power Preamp Kit

Build a Stand-Alone Tube Preamp for Guitar or Bass

The London Power Preamp Kits series allows hobbyists to build a stand-alone tube preamp for guitar or bass. The PSU-PRE power supply supports up to four tubes and allows multiple preamp kits to be combined to create a multi-voice system. London Power’s Galactic Ground is used for low noise and low hum. For elaborate preamps incorporating up to 21 tubes, use the PSU-10 actively regulated power supply.

Each kit uses a silk-screened fibreglass-epoxy printed circuit board to make assembly quick. Tube sockets are high-quality ceramic. Kits include instructions, the printed circuit board (PCB), socket(s) and electronic components. Component packages include metal-film resistors, plastic and electrolytic capacitors and 16mm pots that accept push-on knobs.

All boards and assemblies will fit within a 1U rack-mount chassis height (we have these here). Tubes and PCBs can be mounted in any orientation in larger chassis.

Tubes, wire and chassis are not included, as each builder will have his own preferences and aesthetic requirements.

Pssst!… We now offer a variety of chassis suitable for preamp kits and other projects – see our Rack-Mount Chassis page, or view them under Building Supplies.

The Preamp Series Kits include:

London Power Preamp Kits
Preamp Kits by London Power

PSU-PRE – Power Supply for Tube Preamp

REV – LP-Style Preamp Loop

LINE – Dual Output Buffer

D-PRE – Mini-Marshmallow Preamp

F-PRE – American-Style Preamp

LP-PRE – London Power 2-Channel Guitar Preamp

M-PRE – British-Style Preamp

S-PRE – London Power Spectrum Bass Preamp

V-PRE – Vox-Style Preamp

Z-PRE – High-Gain Preamp Kit

Combine a tube preamp with PSU-PRE to make a stand-alone preamp.

Please also review the Safety page on this site.