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


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LP-PRE is based on London Power's STANDARD Preamplifier presented in our book The Ultimate Tone (TUT) and used our own amp line. The clean channel is distinctly warm and "North American", à la Fender. The lead channel can be tailored for a wide variety of crunch and distortion sounds, up to 1970s saturation levels - anything from Marshall crunch to "modified" saturation. Any 12A_7 types can be used, with maximum gain achieved by fitting two 12AX7s.

Local supply decoupling is included. Channel switching can be provided by use of our Electronic Relay Kit (ERK), or through use of two of our RLY relay kits.

• Clean Level
• High
• Mid
• Low
• Drive
• Lead Level
• High
• Mid
• Low

LP-PRE kit

Power requirements: 12V-300mA; 160-450V-4mA
Use our PSU-PRE Preamp Power Supply or similar to build a stand-alone preamp.
Combine with AMP-10 or AMP-25 to build an integrated amp.

This item includes PCB, tube sockets and components, and helpful installation notes including layout and schematic diagrams of the kit.

Would you like to receive this kit pre-assembled? Add PRE2-BLT to your order.

For more info on London Power Preamp Kits, see our Selecting a Preamp Kit page.

Need a chassis for your preamp project? See our Rack-Mount Chassis page, or browse under Building Supplies.


PCB size: 7.2" x 1.5" (183mm x 38mm)

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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.

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