Happy 2019 from London Power!
In early 2019 we will be launching an updated website. At that time we'll update our prices, many of which have not changed since 2012. Contemplating a purchase? Buy now before prices change.

Tube Amp Kits and Books, Guitar & Bass Amps, Power Scaling Info

Amps & Accessories - button Books for DIY - button Kits & Mods - button Amps & Tech Articles - button

Current Best Sellers!

SV1 Power Scaling Kit


SV1   Power Scaling Kit for Fixed Bias - $78
Mod your tube amp! This is the Power Scaling solution for bedroom-quiet amp sound with cranked tone. Paired with our RBX kit (below), this is appropriate for 99% of amplifiers.



RBX   Raw Bias Auxiliary Supply Kit - $49
Provides a high-voltage low-impedance raw bias supply when one is not readily available in the amp. Also useful when the existing bias supply is too low in voltage or too high in impedance to allow proper operation of bias tracking regulators.


All 6 TUTs

TUT-Deal  All 6 Volumes of The Ultimate Tone - $367
Separately, this complete set of Kevin O'Connor's The Ultimate Tone series would cost $408 plus postage for each shipment, but together they are just $367 with one postage charge. TUT-DEAL contains 1,930 pages and 2,002 schematic figures - all focused on musical instrument amplifiers.


Studio Power AmpSTUDIO   All-Tube Power Amp - $2,820 (approx. $2,260 USD)
STUDIO is the world's first production guitar amp with Power Scaling! Designed for studio use, but some take them on the road.

We Support What We Sell
We encourage you to contact us regarding use & installation of our products.

The Ultimate Tone Forum
Enjoy civilized discourse on tube amp & hi-fi topics, including Kevin O'Connor's The Ultimate Tone (TUT) book series.

Visit The Ultimate Tone Forum!


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
PO Box 10012, Thunder Bay, ON P7B 6T6 CANADA