Mod Kits

Mod kits contain parts to modify or add to your amplifier.

Please note: Some mod kits, such as those with PC boards, take time to assemble before shipment. Please allow 4-6 business days prior to shipping. If you have time requirements, please contact us to inquire about availability and shipment times.



Product Image Item Name Price+
$1.00 Generic/Add-on

$1.00 Generic/Add-on

This item listing allows add-on and upgrade amounts to be added to your Granger Amplification Custom Shop invoice. You may also use this to make...
$1.00

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LED Board Kit

LED Board Kit

Brand new! Our LED Board Kit is a great way to add lighting to your amp or other electronic devices! A very easy kit for the beginner-to-intermediate...
$7.95

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Passive Effects Loop Mod Kit

Passive Effects Loop Mod Kit

Easily install an effects loop in your amp. This bare-bones, passive effects loop includes two shorting/switched jacks of your choice, shielded wire,...
$7.95

Add:

5VDC Voltage Regulated Power Supply

5VDC Voltage Regulated Power Supply

Our small, regulated power supply is based on the same regulated 5V supply we use with our 3 Relay Switching Board, and is easy fit into nearly any...
$9.95

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Premium Rectifier Board

Premium Rectifier Board

Many typical rectifier boards/circuits use only cheap 1N4007 diodes. Our Premium Rectifier board includes a whole lot more! UF4007 diodes provide...
$15.00

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PPIV Master Volume Kit

PPIV Master Volume Kit

If you've got an old Marshall, or other push-pull, non-master volume amp, you already know it has to be cranked up fairly high to get overdriven...
$16.00

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Plexi Amp Wiring Kit

Plexi Amp Wiring Kit

New lower price AND more wire! The Plexi wiring kit is specifically designed for wiring any Plexi/British type amp, including the JTM45, JMP50,...
$16.95

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Adjustable Bias Mod Kit

Adjustable Bias Mod Kit

With our Adjustable Bias Kit you can modify your fixed, non-adjustable biased amp so that you can set the bias for optimal performance, and use other...
$17.00

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Fan Kit

Fan Kit

Easily add a cooling fan to your amp. Our Fan Kit features an 80mm x 80mm brushless fan for quiet operation, a metal fan guard, and a very small PCB...
$17.00

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MOSFET B+ Drop Mod Kit

MOSFET B+ Drop Mod Kit

Want to "brown" your amp's tone? The MOSFET B+ Drop kit provides a more cost effective method of reducing B+ (high voltage) than the...
$20.00

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