Attention: This listing only includes the PCB and Panel, no other parts are included. You will need to source your own parts to complete this product.

Get ready for the bright lights of the colosseum!

We've taken our rock-solid RAT clone, squeezed it into a Eurorack module and added CV control over Gain. The 308 will take your playing to new heights with tremolo and other distortion modulation techniques.

- 3 controls - Tone, Filter, and Drive - to customize your tone. Tone sets the brightness level, Filter dials in the high frequency response, and Drive determines the signal gain.
- 4 Diode Settings - An on-board 4PST DIP Switch selects between 4 different clipping diodes to drastically alter your sound. Turn on the stock version 1N4148s, LEDs, Germanium diodes, or none at all with flick of a little switch.
- Vintage Tone - The PCB is designed from the original RAT tone IC, the LM308 single op amp.
- Control Voltage (CV) Input
- Guitar AND Modular - Adjust the input impedance with a trim pot.
- Plug your guitar in using Circuit Abbey's Axis module.
- 4hp
- Current draw: >10mA on the positive rail

Product Specs

Brand New (New)
308 Distortion Module PCB and Panel
Made In
United States


About The Seller

Joined Feb 2016
Moscow, ID, United States


Accepted Payment Methods

Shipping Policy

Available for local pickup from Moscow, ID, United States

Ships from Moscow, ID, United States to:

Continental U.S.
Everywhere Else

Shipping time -- Orders usually ship within 1 business day.

Combined shipping -- Reverb doesn't automatically combine shipping, so if you want to order multiple items without paying a ton, shoot us a Reverb email with your postal code (or country if you are outside the USA) and we'll send you a shipping quote. Please note that we can only send shipping refunds after you make the order. But we send them fast!

Cases, boats and systems -- Please note that these are made-to-order; please allow 5 business days for us to build them.

International orders -- Our store is not responsible for any duties or taxes on international orders. We cannot send merchandise marked as a "gift."

Tax Policies

United States - WA, MN
Tax is calculated at checkout. Learn about why tax is required in this region.

Return Policy

Return Window

This product can be returned within 30 days of receipt.

General Terms

Items must be returned in original, as-shipped condition with all original packaging and no signs of use. Buyer assumes responsibility for all return shipping costs unless the item was not received as described.


Buyer receives a full refund in their original payment method less any shipping costs and a 5% restocking fee.

Special Conditions

We accept returns on all products in their original packaging. Kits and PCBs can also be returned, but ONLY if they are not soldered/built. There is a 5% restocking fee on all returns.


If you are missing a component from your kit, please email us immediately. Our kits are handpicked and errors, although rare, can occur (we're only human). We'll send you out what you need immediately and we'll make sure to hook you up.

If you are having any difficulty building your kit, or if you have any questions, feel free to call us or email us, we are happy to help!

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Accepted Payment Methods

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Moscow, ID, United States
Joined: Feb 2016

Seller Achievements

Synthrotek 308 Distortion Module PCB and Panel
+ $3 Shipping