MXR releases MRT01 Mr. TalkBox signature talk box for Byron Chambers

August 27, 2026 · 4 sources

MXR released the MRT01 Mr. TalkBox Signature Talk Box, a signature model made with Byron "Mr. TalkBox" Chambers, on August 27, 2026¹. The maker describes Chambers as "a Grammy-recognized artist whose talk box talents have lent unmistakable, expressive power to some of the defining gospel, funk, R&B, and pop records of the modern era"².

The pedal is based on the MXR M222 Talk Box and carries Volume, Tone and Gain controls²³. Like the M222, it includes its own amp and speaker driver, so it does not need to be patched into an amp's speaker output². MXR says it changed the driver from ferrite to a lightweight neodymium unit and raised the amp from 10 to 25W for more headroom². Gearnews reports the pedal runs at 18 volts and describes the 25-watt preamp as twice the headroom of the M222's 10 watts³.

Two back-panel switches add functions. A Mute toggle, when set to mute, sends the instrument signal through the tube but not to the pedal's output; unmuted, output comes through both². A Gain Bypass switch routes the signal around the preamp stage and clipping diodes, which MXR says suits hotter keyboard signals and lets guitar players drive the power amp with their own pedals². The package includes an 18-volt power supply, an 8-foot tube and a mic stand clip². Gearnews describes the tube as black surgical tubing and the finish as shiny gold³.

The US list price is $449.99⁴³. Gearnews reported the pedal was available to pre-order³. The M222 Talk Box is listed at $209.99².

Guitar Pedal X put the US price at $450 and called it "a substantial investment for an occasional effect"¹.