Z-PRE – High-Gain Preamp Kit

CAD $46.00CAD $218.00


Our high-gain tube preamp kit – Z-PRE – is based on London Power’s Zen amplifier – a high-gain monster built for shredders and modern guitar soundsmiths.

Modern high-gain guitar sounds are easily produced with a pair of 12AX7 tubes in a cascaded four-stage preamp.  This 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 the Z-PRE with our F-PRE Fender-style Preamp Kit for a clean sound; or with M-PRE British-style Preamp Kit as a clean or rhythm sound, selectable using our ERK Electronic Relay Kit or Q-system switching kits.

The board has silk-screening on both sides which allows you to stuff the components appropriately for INTERNAL or EXTERNAL TUBES. For INTERNAL, all the components are on the same side of the board; for EXTERNAL the components are on the opposite side from the tube sockets.

• 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-25 to build an integrated amp.

Configurations available for purchase:
Standard DIY kit (PCB + resistors + tube sockets + caps + notes) (Z-COMP)
Pre-assembled kit – configured for Internal tubes (Z-INT)
Pre-assembled kit – configured for External tubes (Z-EXT)
Hard-to-find parts only (Z-HP)
PCB + notes only (Z-PCB)

Notes include 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