Z-PRE - High Gain Preamp Kit


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Modern high-gain guitar sounds are easily produced with a pair of 12AX7 tubes in a cascaded four-stage preamp. Z-PRE is based on London Power's Zen amplifier - a high-gain monster built for shredders and modern guitar soundsmiths. The Soldano-like circuit uses any 12A_7s, with maximum gain achieved by fitting two 12AX7s. Use lower-mu tubes for less gain and smoother tone.

Local supply decoupling is included. 6V and 12V heater wiring is accommodated.

Combine Z-PRE with our F-PRE for a clean sound; or with M-PRE as a clean or rhythm sound, selectable using our ERK or QRK.

• Drive
• Treble
• Mid
• Bass
• Volume

Power requirements: 12V-300mA or 6V-600mA; plus 320V-4mA

Use PSU-PRE 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, resistors, and caps. Also includes installation instructions with layout and schematic diagrams of the kit.

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: 4.5" x 1.5" , 115 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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