Tube Amp Kits & Books • Preamp Kits • Guitar/Bass Amps • Hifi • Power Scaling • Technical Information • Downloads

We are in our 20th year of selling online to satisfied customers all around the world. Thank you for your support!

Browse the site for fube amp & hifi kits designed by Kevin O'Connor, with superior-quality parts. See our selection of tube amp and hifi books. Questions are welcome. Also, check out the amplifier technical articles below, and our FAQ.


Current Best Sellers!

SV1 Power Scaling Kit


SV1 - Power Scaling Kit for Fixed Bias - $78
Paired with RBX, this is the Power Scaling solution 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, these books 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. Less expensive than a college education - and no exams! Just pure fun learning about guitar amps.


Technical Articles: Read On

If you like the information on this site, just imagine what you'll find in our books!

We Support What We Sell
We encourage you to contact us regarding applications for and installation of our products.


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