MXR M193 GT-od
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Manufacturer Information
MXR
https://www.jimdunlop.com
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Algam SAS
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A "classic" overdrive designed Custom Shop style
The GT-OD Custom Shop follows the great tradition of "warm and smooth" overdrives: a musical drive capable of thickening a clean tone, adding crunch to a crunch channel, or pushing an already saturated amp without making it muddy. The Custom Shop approach emphasizes high-quality component selection and a simple philosophy: an efficient analog circuit, few controls, but a very wide usable range, with a nice sense of openness and natural dynamics.
Who is it for, and in which styles?
This pedal is suitable for both beginner guitarists (who want an easy-to-adjust overdrive) and experienced musicians looking for an "always-on" drive or a characterful boost. In blues, rock, and pop, it delivers warm saturation rich in harmonics, perfect for rhythms that need to remain clear. In hard rock and metal, it also excels as a boost in front of a high-gain amp to tighten the lows, gain definition, and bring out palm-muted attacks.
In the studio, its low noise floor and dynamic response facilitate recording. Live, it becomes a reliable solution to switch from a punchy clean to an articulated crunch or to make a solo "sing" without changing the overall mix balance.
Controls, ergonomics, and operation
The MXR Custom Shop GT-OD gets straight to the point with three potentiometers: Output (output level), Tone (brightness and overall balance), and Gain (saturation amount). This setup allows for quick adjustments: first set the volume to match the bypass level (or push the amp input), then dial in the gain according to the desired compression level, and finally adjust the tone to suit the guitar (single coils, humbuckers) and the amp.
Regarding integration, the pedal features a 6.35mm Jack input and output, and a sturdy footswitch. The true bypass (hardwire bypass) preserves the signal integrity when the effect is off, convenient for traditional pedalboards and simple signal chains.
Sound character
The GT-OD's sonic character is often described as warm, smooth, and "open". It remains transparent (minimal unwanted coloration) while adding just enough grit to provide definition: a snappy crunch that keeps chord clarity, and a thicker lead tone rich in harmonics with generous sustain. Its dynamics are a real strength: it responds well to guitar volume and pick attack, helping to transition from slight breakup to more pronounced saturation without changing settings.
The GT-OD family is also noted in rigs oriented towards modern rock and metal, proving its versatility: equally comfortable as a main overdrive or as a boost to shape a saturated channel.
Technical specifications
| Effects | Distortion / Overdrive / Fuzz, Overdrive | EQ | Tone |
| Technology | Analog | Settings | tone, gain, output |
| Format | Pedal | Use | guitar, Pedalboard |
| Inputs | Jack | Color | Green |
| Outputs | Jack | Power supply included | No |
| True bypass | Yes | Power supply | 9V battery, DC 9 V |
| Category | overdrive | Noise floor | above 88 dB (A-weighted, mid-position settings) |
| Adjustments | Output, Tone, Gain | Pedal | yes |
| Expression pedal | no | Documentation | yes |
| Input impedance | 1 megaohm | 9 V battery | no |
| Output impedance | less than 7.5 kiloohms | Consumption | 2.2 mA |
Questions frequently asked
What sound does the MXR M193 GT-OD deliver?
The analog circuit produces a warm and smooth overdrive with a crunch that preserves chord clarity. The dynamic response allows modulation of the texture through the guitar's attack and volume.
Can it be used as a boost in front of a high-gain amp?
In front of a high-gain amp, this pedal tightens the bass, increases definition, and enhances the attack in palm-muted playing.
What power supply is required for this overdrive?
The power supply accepts a 9 V battery or a 9 V DC adapter. No power adapter or battery is included. The stated current consumption is 2.2 mA.
What connectors and bypass does this pedal offer?
The connections use 6.35 mm jack input and output. The hardwire bypass keeps the signal intact when the effect is off.
Are the GT-OD controls easy to use?
With the three controls Tone, Gain, and Output, settings are quickly made. The output level can be matched to the bypass signal or used to drive the amp input harder.
