Skip to content
NOTICEOrders placed September 26-28, 2024 will ship Monday, September 30.

Gladiator Dual Overdrive

Based On
King Tone Duellist
Effect Type
Dual-channel overdrive
Build Difficulty
Intermediate
Project Summary
A popular dual-channel overdrive first released in 2015 that combines a stripped-down Tube Screamer with a hot-rodded Bluesbreaker.

Complete Kit

What's included?
PCB, finished enclosure, hardware,
and all electronic components.

$129.00

Out of stock

Currently unavailable, but we expect to have more soon. Sign up for the mailing list to be notified of restocks and new products.
Gladiator Dual Overdrive printed circuit board

PCB Only

What's included?
Just the PCB. Build instructions and parts list can be viewed or downloaded from this page.

$16.00

In stock

Project overview

The Gladiator Dual Overdrive is based on the King Tone Duellist, a highly prized dual pedal first released in 2015 consisting of the “String Singer” for side A and the “Heavy Hand” for side B. The Duellist was traced by Aion FX in 2022.

The String Singer is based on a stripped-down Tube Screamer with input & output buffers removed. The circuit is highly modified, so the EQ and clipping will sound drastically different from the classic Ibanez circuit, but that was the source at least. This half of the circuit was released in single-pedal format as the Soloist, available from Aion FX as the Gladius.

The Heavy Hand is based on the Marshall Bluesbreaker, but again it has been heavily modified from the original circuit—so it may remind you of it, but it’s not going to sound quite the same. This half of the was also released as a single pedal called the Heavyhand, available from Aion FX as the Xiphos.

Each side also has an external “EQ” toggle switch to select between different EQ voicings, as well as two internal DIP switches for fat EQ and asymmetrical clipping (side A) or and asymmetrical clipping and hard clipping (side B).

The Gladiator simplifies the send/return functionality of the original unit by including 4 jacks by default. The send & return now have their own jacks that automatically short together if nothing is plugged in. Otherwise, the Gladiator is a direct clone of the Duellist based on our own trace. Details are available in the tracing journal.