Venerable Japanese pedal builder Maxon, responsible for the very first Tube Screamers (company owner Nisshin Onpa designed and manufactured the TS-808/TS808 and TS9 for Ibanez from 1974 until 2002) is turning 40 and, to celebrate this noteworthy milestone, is asking many of today’s best pedal engineers to create mods of their classic stompboxes.

The first product of this series is the Keeley-modded OD808-40K. Here’s what the Oklahoma-based pedal designer says about his version of it:

For this 40th anniversary edition I put everything into making it a very hot, stacked gain sounding overdrive.  It is everything a classic OD808 is, just Maxed out!

There will be only 400 copies of this pedal and the first 40 will be signed by Keeley and also feature a mini-toggle switch to go between the standard OD808 tone and the Keeley Max-Gain mod.

Maxon has collaborated with master pedal engineer Robert Keeley to bring you the limited edition 40th Anniversary Keeley-modded OD808.

The OD808-40K features Keeley’s all-new “Max-Gain” mod which delivers a louder, hotter, stacked-gain sound while still retaining the OD808’s signature tone.

“The sleek and classic sounding Maxon OD808 has always been a favorite of mine.  What I have always wanted to do is fully realize the mods in my head.  I wanted to change several aspects at once.  For this 40th anniversary edition I put everything into making it a very hot, stacked gain sounding overdrive.  It is everything a classic OD808 is, just Maxed out!” – Robert Keeley

As with the OD808-40, the OD808-40K will be limited to a production of 400 individually numbered units, each with its own signed certificate of authenticity.

In addition, units 1-40 will be hand-signed by Mr. Keeley and also feature a mini-toggle switch to go between the standard OD808 tone and the Keeley Max-Gain mod.