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

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.....

D-PRE - Mini-Marshmallow Preamp Kit

D-PRE - Mini-Marshmallow Preamp Kit

$128.00

D-PRE is based on our Mini-Marshmallow amp, which was a tribute to Howard Dumble. The basic topol.....

D-PRE-HP

D-PRE-HP

$50.00

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

D-PRE-PCB

D-PRE-PCB

$38.00

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

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.....

F-PRE-HP

F-PRE-HP

$44.00

F-PRE-HP is the "hard parts" for an F-PRE Fender-style Tube Preamp, including the printed circuit.....

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. .....

LIC - Technology Licence (per unit)

LIC - Technology Licence (per unit)

$5.00

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

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.....

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 (.....

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.....

LP-PRE-PCB

LP-PRE-PCB

$38.00

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

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.....

M-PRE-HP

M-PRE-HP

$50.00

M-PRE-HP is the "hard parts" for M-PRE British-style Tube Preamp, including the printed circuit b.....

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. .....

PSU-PRE - Power Supply Kit for Tube Preamp

PSU-PRE - Power Supply Kit for Tube Preamp

$98.00

PSU-PRE can support up to six 12A_7 tubes - enough for a 3-channel preamp with effects loop, cons.....

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 .....

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.....

REV-COMP

REV-COMP

$120.00

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

REV-HP -  Reverb PCB + Hard-parts

REV-HP - Reverb PCB + Hard-parts

$92.00

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

REV-PCB

REV-PCB

$38.00

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

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 .....

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.....

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.....

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.....

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 - 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-.....

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-.....

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 .....

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