AMT Electronics AMT G-Packer

The AMT Electronics AMT G-Packer is an optical compressor for guitar, described by the maker as an "optical compressor for guitar"¹. AMT's media center now lists it as discontinued², so it appears on the used market rather than in current production. As a compressor, it sits in the same family of effects as other compressor pedals, evening out a guitar's dynamics, and it goes beyond that basic job by adding time-based effects and cabinet simulation.

What it does

The G-Packer is built around an optical compression circuit, the type that uses a light-dependent element to control gain, a design often chosen for smooth, transparent compression¹.

Beyond the compression itself, the pedal carries a set of extra features that make it closer to a compact multi-effect than a straight compressor²:

• Delay or Reverb per preset: each preset can select either a delay or a reverb effect²
• IR cabinet simulation: each preset holds one impulse response for both the left and right channels, giving stereo cab simulation output²
• Noise Gate: a global setting, meaning it applies across the pedal rather than per preset²

Because the IR cab sim works across left and right channels, the pedal can be run in stereo at the end of a chain, in the manner of speaker simulation pedals, while the compression works on the guitar signal itself².

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