Tube Preamp Kits

Tube Preamp Kits

Our selection of unique Tube Preamp Kits features something for every sonic taste, from Fender, to Dumble, to British, to heavy rock, to modern metal, using 12A_7 tubes. Low-noise design uses 12V heater wiring.

Designed by Kevin O'Connor and supplied with the highest quality parts.

If you have questions about application or installation, please email us at amps@londonpower.com, or phone 807-473-0952 from 11am-6pm, M-F EST

LIC - Technology Licence (per unit, for commercial builders and installers)

LIC - Technology Licence (per unit, for commercial builders and installers)

$5.00

NOTE: Installations and constructions using London Power kits are inherently licenced, and no add.....

D-PRE-PCB

D-PRE-PCB

$38.00

D-PRE-PCB is just the printed circuit board and notes for our D-PRE Mini-Marshmallow Style Tube P.....

F-PRE-PCB

F-PRE-PCB

$38.00

F-PRE-PCB is the printed circuit board plus assembly notes for F-PRE Fender-style Tube Preamp. .....

LP-PRE-PCB

LP-PRE-PCB

$38.00

LP-PRE-PCB is the printed circuit board and assembly notes for our LP-PRE London Power 2-Channel .....

M-PRE-PCB

M-PRE-PCB

$38.00

M-PRE-PCB is the printed circuit board and assembly notes for M-PRE British-style Tube Preamp. .....

REV-PCB - LP-Style Reverb Loop: PCB only

REV-PCB - LP-Style Reverb Loop: PCB only

$38.00

This is the London Power style reverb loop, using a push-pull reverb driver and two-stage recover.....

V-PRE-PCB

V-PRE-PCB

$38.00

V-PRE-PCB is the printed circuit board and assembly notes for V-PRE Vox Top-Boost-style Tube Prea.....

Z-PRE-PCB

Z-PRE-PCB

$38.00

Z-PRE-PCB is the PCB and notes for the Zen-style High-gain Tube Guitar Preamp. See Z-PRE for .....

PRE1-BLT

PRE1-BLT

$40.00

PRE1-BLT can be added to your order for any Tube Preamp that has a single tube, including: &n.....

PSP-BLT - Pre-assembly of Simple PSUs

PSP-BLT - Pre-assembly of Simple PSUs

$40.00

Add PSP-BLT to your order of PSU-PRE Power Supply Kit for Tube Preamp if you would like to receiv.....

F-PRE-HP

F-PRE-HP

$44.00

F-PRE-HP is the "hard-to-find parts" for our F-PRE Fender-style Tube Preamp, including the printe.....

V-PRE-HP

V-PRE-HP

$44.00

V-PRE-HP includes the "hard parts" for V-PRE Vox-Top-Boost-style Tube Preamp, including the print.....

TX316 - Push-Pull Reverb Driver Transformer

TX316 - Push-Pull Reverb Driver Transformer

$48.00

Hobbyists and amp builders can now use the same high-quality transformers and chokes found in Lon.....

QS-LV - Quiet Supply for Low-Voltage Tube Amps

QS-LV - Quiet Supply for Low-Voltage Tube Amps

$49.00

The QS-LV provides a large reduction of supply-borne noise and hum - typically 60dB from 50Hz to .....

D-PRE-HP

D-PRE-HP

$50.00

D-PRE-HP is the "hard-to-find parts", essentially the printed circuit board and the tube sockets,.....

LP-PRE-HP

LP-PRE-HP

$50.00

LP-PRE-HP is the printed circuit board, tube sockets and assembly notes for LP-PRE London Power 2.....

M-PRE-HP

M-PRE-HP

$50.00

M-PRE-HP is the "hard-to-find parts" for our M-PRE British-style Tube Preamp, including the print.....

Z-PRE-HP

Z-PRE-HP

$50.00

Z-PRE-HP is the PCB plus tubes plus kit notes for the Zen-style High-gain Tube Preamp. See Z-.....

PRE2-BLT

PRE2-BLT

$80.00

Add PRE2-BLT to your order of a Tube Preamp that uses two tubes, to obtain that kit pre-assembled.....

F-PRE - Fender-Style Preamp Kit

F-PRE - Fender-Style Preamp Kit

$88.00

F-PRE is the classic North American style of clean preamp: two gain stages with an EQ and level c.....

V-PRE - Vox Top Boost Preamp

V-PRE - Vox Top Boost Preamp

$88.00

V-PRE is the famous Vox "Top Boost" channel of their classic AC-30 amp from the 1960s 3-w.....

REV-HP -  LP-Style Reverb Loop: PCB + Hard-to-find Parts only

REV-HP - LP-Style Reverb Loop: PCB + Hard-to-find Parts only

$92.00

This is the London Power style reverb loop, using a push-pull reverb driver and two-stage recover.....

BFX - Best All-Tube Effects Loop Kit

BFX - Best All-Tube Effects Loop Kit

$98.00

BFX can be incorporated into any tube amp, providing a tube solution to active effects loop requi.....

PSU-PRE - Power Supply Kit for Tube Preamp

PSU-PRE - Power Supply Kit for Tube Preamp

$98.00

PSU-PRE can support up to five12A_7 tubes - enough for a 3-channel preamp with effects loop, cons.....

M-PRE - British-Style Preamp Kit

M-PRE - British-Style Preamp Kit

$115.00

M-PRE produces traditional British rock and metal sounds. The card allows wiring as a dual-volume.....

S-PRE - London Power Spectum Bass Preamp Kit

S-PRE - London Power Spectum Bass Preamp Kit

$115.00

The S-PRE is based on the preamp sections of London Power's SPECTRUM bass amps. The front end is .....

Z-PRE - High Gain Preamp Kit

Z-PRE - High Gain Preamp Kit

$115.00

Modern high-gain guitar sounds are easily produced with a pair of 12AX7 tubes in a cascaded four-.....

LINE - Dual Output Buffer Kit

LINE - Dual Output Buffer Kit

$120.00

The LINE kit is two buffer circuits with transformer-isolated outputs. These buffers can be fed f.....

REV-COMP - LP-Style Reverb Loop: PCB + Components only

REV-COMP - LP-Style Reverb Loop: PCB + Components only

$120.00

This is the London Power style reverb loop, using a push-pull reverb driver and two-stage recover.....

D-PRE - Mini-Marshmallow Preamp Kit

D-PRE - Mini-Marshmallow Preamp Kit

$128.00

D-PRE is based on London Power's Mini-Marshmallow amp, which was a tribute to Howard Dumble. The .....

LP-PRE - London Power 2-Channel Guitar Preamp Kit

LP-PRE - London Power 2-Channel Guitar Preamp Kit

$128.00

LP-PRE is based on London Power's STANDARD Preamplifier presented in our book The Ultimate Tone (.....

REV - LP-Style Reverb Loop Kit

REV - LP-Style Reverb Loop Kit

$180.00

This is the London Power style reverb loop, using a push-pull reverb driver and two-stage recover.....

About London Power

London Power was founded in 1990 by Kevin O'Connor, after two decades of research into innovative audio amplification techniques. Kevin is an audio designer, author and speaker, known for his proprietary methodology called Power Scaling, and for his eleven books on audio subjects. Whether you seek amps, kits or information, you'll find useful answers here on not just the "how" but the "why" of audio amplifier design. Please enjoy the information on this site, and don't hesitate to contact us with questions.

Contact Us

(807) 473-0952
11 am - 6 pm, M-F
amps@londonpower.com
PO Box 10012, Thunder Bay, ON P7B 6T6 CANADA