All Books, Kits & Mods

Master list of all London Power / Power Press Publishing books, kits, mods and downloads.

1U-13 - Single Rack Space Chassis 13" deep

1U-13 - Single Rack Space Chassis 13" deep

$130.00

Aluminum rack-mount chassis 1U tall (1.75", 44mm) and 13" deep (330mm). Textured black paint, exc.....

1U-8 - Single Rack Space Chassis 8" deep

1U-8 - Single Rack Space Chassis 8" deep

$110.00

Aluminum rack-mount chassis 1U tall (1.75", 44mm) and 8" deep (203mm). Textured black paint, exce.....

2U-13 - Two Rack Space Chassis 13" deep

2U-13 - Two Rack Space Chassis 13" deep

$160.00

Aluminum rack-mount chassis 2U tall (3.5", 88mm) and 13" deep (330mm). Textured black paint, exce.....

2U-8 - Two Rack Space Chassis 8" deep

2U-8 - Two Rack Space Chassis 8" deep

$130.00

Aluminum rack-mount chassis 2U tall (3.5", 88mm) and 8" deep (203mm). Textured black paint, excep.....

4U-13 - Four Rack Space Chassis 13" deep

4U-13 - Four Rack Space Chassis 13" deep

$210.00

Aluminum rack-mount chassis 4U tall (7", 177mm) and 13" deep (330mm). Textured black paint, excep.....

AL20 - Class-A Baby Leach Amp

AL20 - Class-A Baby Leach Amp

$4.00

AL20 is a pure class-A "Baby" Leach solid-state power amp. 20W pure class-A complim.....

AMP-10 - 10W Tube Power Amp with Matching Power Supply

AMP-10 - 10W Tube Power Amp with Matching Power Supply

$516.00

AMP-10 is a 10W tube power amp with a matching power supply. AMP-10 is comprised of two eleme.....

PA-BLT - Pre-assembly of Power Amp

PA-BLT - Pre-assembly of Power Amp

$80.00

Add PA-BLT to your order of a power amp kit, to receive that kit pre-assembled. This applies to: .....

AMP-25 - 25W Tube Power Amp With Matching Power Supply

AMP-25 - 25W Tube Power Amp With Matching Power Supply

$564.00

AMP-25 is a 25W tube power amp with a matching power supply. AMP-25 is comprised of two eleme.....

AMP-50 - 50W Tube Power Amp With Matching Power Supply

AMP-50 - 50W Tube Power Amp With Matching Power Supply

$664.00

AMP-50 is a 50W tube power amp with a matching power supply. AMP-50 is comprised of two eleme.....

All 11 Books - Special Deal

All 11 Books - Special Deal

$543.00$490.00

Order all eleven books by Kevin O'Connor, and save money! Get TUT, TUT2, TUT3, TUT4, TUT5, T.....

BFX-BLT - Pre-Assembly of BFX

BFX-BLT - Pre-Assembly of BFX

$40.00

Add BFX-BLT to your order for BFX to have the BFX pre-assembled. Like any kit with a tube soc.....

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.....

BFX-HP

BFX-HP

$42.00

BFX-HP is the PCB plus tube socket for the Best All-tube Effects Loop. .....

BFX-PCB

BFX-PCB

$38.00

BFX is the Best All-Tube Effects Loop, and BFX-PCB is the printed circuit board and kit notes for.....

3U-13 - Three Rack Space Chassis 13" deep

3U-13 - Three Rack Space Chassis 13" deep

$180.00

Aluminum rack-mount chassis 3U tall (5.25", 133mm) and 13" deep (330mm). Textured black paint, ex.....

BL20 - "Baby" Leach Power Amp

BL20 - "Baby" Leach Power Amp

$4.00

BL20 is the "Baby" Leach amp. Where most similar designs are aimed at 100W+, BL20 is targeted for.....

BLQE - "Baby" Leach w/ Quad-Comp EF Output

BLQE - "Baby" Leach w/ Quad-Comp EF Output

$4.00

BLQE is the "Baby" Leach power amp with a Bryston-style Quad-Complementary output stage wired for.....

BMK2 - Bias Mod Kit

BMK2 - Bias Mod Kit

$24.00

Bias Mod Kits allow easy checking of output tube bias currents, regardless of whether those tubes.....

BMK4 - Bias Mod Kit

BMK4 - Bias Mod Kit

$35.00

Bias Mod Kits allow easy checking of output tube bias currents, regardless of whether those tubes.....

BMK6 - Bias Mod Kit

BMK6 - Bias Mod Kit

$44.00

Bias Mod Kits allow easy checking of output tube bias currents, regardless of whether those tubes.....

BMK8 - Bias Mod Kit

BMK8 - Bias Mod Kit

$53.00

Bias Mod Kits allow easy checking of output tube bias currents, regardless of whether those tubes.....

CARD - Circuit Card Refill

CARD - Circuit Card Refill

$7.00

6" x 12" x 1/16" thick glass-epoxy card stock. Rigid material - can be cut to size by the user. .....

CCK - Circuit Card Kit

CCK - Circuit Card Kit

$62.00

200 eyelets, one piece of 6" x 12" x 1/16" thick glass-epoxy card stock, hand sta.....

CH-13 - Insert Panel for 13" Deep Chassis

CH-13 - Insert Panel for 13" Deep Chassis

$50.00

This 11" (280mm) aluminum sub-chassis can be mounted inside a 13" deep (330mm) or deeper chassis,.....

CH-8 - Insert Panel for 8" Deep Chassis

CH-8 - Insert Panel for 8" Deep Chassis

$40.00

This 6" (152mm) aluminum sub-chassis can be mounted inside an 8" deep (203mm) or deeper chassis, .....

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.....

DFC - Dual Function Controller

DFC - Dual Function Controller

$68.00

DFC - Dual Function Controller allows independent control over two functions or features in an am.....

DFC-BLT - Pre-assembly of DFC

DFC-BLT - Pre-assembly of DFC

$80.00

If you would like to receive your DFC Dual Function Controller kit pre-assembled, add DFC-BLT to .....

ERK - Electronic Relay Kit

ERK - Electronic Relay Kit

$29.00

ERK Features: A, B exclusive selection ground-referenced jfet shunt switch elements.....

EYELETS-100

EYELETS-100

$9.00

Order 100 or 1000. Bulk eyelets for your building needs. Two-hundred eyelets is typically en.....

EYELETS-1k

EYELETS-1k

$84.00

Order 100 or 1000. Bulk eyelets for your building needs. Two-hundred eyelets is typically en.....

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. .....

FPM - 2-Channel Fender Preamp Mod

FPM - 2-Channel Fender Preamp Mod

$15.00

FPM converts the preamp channels in a vintage Fender amp to that of the LPSP London Power Standar.....

FSW - Alternate-action Foot Switch

FSW - Alternate-action Foot Switch

$18.00

FSW is a large-body push-on/push-off alternate-action foot switch with a chrome actuator. Popular.....

GMX-KIT - Transconductance Multiplier

GMX-KIT - Transconductance Multiplier

$89.00

The "GmX" effect is the difference of sound between a 50W amp with two power tubes and a 100W amp.....

GND - Ground link isolator

GND - Ground link isolator

$15.00

GND replaces the old-fashioned ground 'lift' switch of olde with a modern automatic ground-link g.....

HF-QS - Hifi Quiet Supply

HF-QS - Hifi Quiet Supply

$2.00

HF-QS is used to provide extraordinarily smooth DC voltages to solid-state power amplifier front-.....

JLH-10 - Class-A PA

JLH-10 - Class-A PA

$2.00

JLH-10 is the classic 1969 John Linsley-Hood circuit of a solid-state 10W class-A power amp desig.....

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-MV London Power Master Volume

LP-MV London Power Master Volume

$10.00

This is the best master-volume on the planet! Truly transparent. No tone change with setting. And.....

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. .....

MOS - replacement mosfet + thermopad

MOS - replacement mosfet + thermopad

$8.00

Did you damage the mosfet in your London Power kit installation? It always saves time to follow t.....

PA66-10 - PCB + Components + OT-10

PA66-10 - PCB + Components + OT-10

$245.00

The London Power PA66-10 Octal Push-Pull tube power amplifier can be used with any of the common .....

PA66-25 - PCB + Components + OT-25

PA66-25 - PCB + Components + OT-25

$264.00

The London Power PA66-25 Octal Push-Pull tube power amplifier can be used with any of the common .....

PA66-50 - PCB + Components + OT-50

PA66-50 - PCB + Components + OT-50

$348.00

The London Power PA66-50 Octal Push-Pull tube power amplifier can be used with any of the common .....

PA66-976 - PCB + Components + LP TX976 Transformer

PA66-976 - PCB + Components + LP TX976 Transformer

$306.00

The London Power PA66-976 Octal Push-Pull tube power amplifier can be used with any of the common.....

PA66-COMP - PCB + All Passive Components

PA66-COMP - PCB + All Passive Components

$138.00

The London Power PA66-COMP Octal Push-Pull tube power amplifier can be used with any of the commo.....

PA66-HP - Octal Push-Pull Power Amp - PCB + Hard-to-Find Parts

PA66-HP - Octal Push-Pull Power Amp - PCB + Hard-to-Find Parts

$54.00

The London Power PA66-HP Octal Push-Pull tube power amplifier can be used with any of the common .....

PA66-PCB - Octal Push-Pull Power Amp - Board Only

PA66-PCB - Octal Push-Pull Power Amp - Board Only

$38.00

The London Power PA66-PCB Octal Push-Pull tube power amplifier can be used with any of the common.....

POP - Principles of Power

POP - Principles of Power

$44.00

Principles of Power - A Practical Guide to Tube Power Amplifier Design By Kevin O'Connor, ©19.....

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 if you would like to receive PSU-PRE pre-assembled. PSP-.....

PSU-BLT - Assembly of Large Power Supply

PSU-BLT - Assembly of Large Power Supply

$80.00

Add PSU-BLT to your order, to have the following products shipped pre-assembled: PSU-COMP.....

PSU-10 - Super-Quiet Power Supply for 10W Tube Power Amp

PSU-10 - Super-Quiet Power Supply for 10W Tube Power Amp

$320.00

PSU-10 supports a 10W tube power amplifier and preamp and is an ideal match to London Power's PA6.....

PSU-25 - Super-Quiet Power Supply for Tube Power Amp + 25W Transformer

PSU-25 - Super-Quiet Power Supply for Tube Power Amp + 25W Transformer

$362.00

PSU-25 supports a 25W tube power amp and preamp and is optimally matched to London Power's PA66-2.....

SV-BLT - Pre-assembly of Power Scaling Kit

SV-BLT - Pre-assembly of Power Scaling Kit

$80.00

Add SV-BLT if you would like to receive your Power Scaling kit pre-assembled. This applies to: .....

PSU-50 - Super-Quiet Power Supply for 50W Tube Power Amp

PSU-50 - Super-Quiet Power Supply for 50W Tube Power Amp

$390.00

PSU-50 is a super-low-noise power supply that supports a 50W tube power amplifier, or a 25+25W st.....

PSU-100 - Super-Quiet Power Supply for 100W Tube Amp

PSU-100 - Super-Quiet Power Supply for 100W Tube Amp

$520.00

PSU-100 is a super-quiet power supply that can support 100W-worth of tube audio power amplificati.....

PSU-COMP - Super-Quiet Power Supply for Tube Amp - PCB + Passive Components

PSU-COMP - Super-Quiet Power Supply for Tube Amp - PCB + Passive Components

$158.00

PSU-COMP is the PSU-TPA tube amp power supply PCB plus the components that mount on the board, pl.....

PSU-OPA - opamp supply derived from heater

PSU-OPA - opamp supply derived from heater

$50.00

PSU-OPA provides a transformer-isolated +/-8Vdc supply for opamps derived from the 6Vac heater su.....

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.....

PSU-TPA - Power Supply for Tube Power Amp - PCB Only

PSU-TPA - Power Supply for Tube Power Amp - PCB Only

$38.00

Tube power amplifiers require various voltages for the plate circuit, bias and heaters. PSU-TPA p.....

PSX - Power Scale control switch

PSX - Power Scale control switch

$15.00

PSX provides an easy interface between ERK Electronic Relay Kit and multiple Power Scale controls.....

PSW - toggle-style latching panel switch

PSW - toggle-style latching panel switch

$16.00

PSW is a high-quality latching toggle switch made by C&K, that can be used as a front panel s.....

PX66-COMP - Card for extra power tubes with components

PX66-COMP - Card for extra power tubes with components

$70.00

PX66-COMP allows additional pairs of output tubes to be added to PA66 for more power, fuller tone.....

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