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GC-2 Limiting Amplifier Compressor Pedal

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Item: N13-4155

Availability: In stock

GC-2 Limiting Amplifier Compressor Pedal
GC-2 Limiting Amplifier Compressor Pedal GC-2 Limiting Amplifier Compressor Pedal GC-2 Limiting Amplifier Compressor Pedal


The Keeley ‘GC-2’ is a Limiting Amplifier and Compressor Pedal designed for Guitars and other Instruments utilizing the same great professional compression/limiting technology available in Keeley’s Bassist Limiting Amplifier! For Musicians and compressor fans of all kinds!

The Keeley Compressor GC-2 Limiting Amplifier provides true high-fidelity compression and limiting.

The Keeley Compressor GC-2 Limiting Amplifier is built around the exotic and extremely high-fidelity THAT Corp. 4320. Think of it as very musical studio-grade compressor in stomp box format! It uses high performance Voltage Controlled Amplifiers, on board true-RMS detector, and ultra-high performance op-amps to bring users the very best quality. This type of compressor gives users precise control and very musical results. This along with a full frequency range means that the GC-2 Limiting Amplifier compressor is well suited for guitar, keyboards, drum machines and, really, anything users throw at it. The Keeley GC-2 Limiting Amplifier is both musical and transparent. Where Keeley’s older compressors were based on the CA3080 or the LM13700 and are perfect for that “Compressor Effect” and are still in use by tens of thousands of players, the new Keeley GC-2 is a different style compressor, aimed at being the ultimate in low noise and transparency. Not only can it handle astonishingly large signals, but it has an incredible bandwidth of over 20 KHz. No detail in the guitar’s tone will be lost. The Keeley GC-2 will be a sound investment in tone!

When musicians use the new Keeley Compressor GC-2, they will be greeted with a sound that is more easily amplified and heard. Using the effect as a limiting amplifier saves speakers from clipping and distortion. Set the Threshold to look for peaks in the signal and limit distortion from the amplifier or damage to speakers. Simply watch the Threshold Indicator light to see what type of playing to limit; it’s that easy! Next, set the Compression Ratio Control to determine how much squash happens when the signal is above Threshold. Set Compression all of the way down (1:1) for no compression and use the Gain control as a boost. Set Compression all of the way up for an above-Threshold, hard-knee limiter.

There is a certain figure that just sounds good as far as compression goes, and that’s 125 dB/second.  With feed-forward compressors that use this type of true-RMS detector players use a single time-constant parameter. The timing capacitor gives players attack and release times that are adaptive to their playing level or the signal input to the compressor. Bottom line: Attack and Release times vary on program content. Attack times are, generally speaking, about 100 times faster than release times.

Users don’t need a tone control or a blend control on a compressor. In fact, in Keeley’s opinion it’s not a good idea. If users want a blend control, they are undoing the compressor. Instead, set the Threshold high and only let peaks be processed and then set the Compression Ratio to 2:1 or 4:1. Much smarter. So, tone control? None here. It has tone for days, and there is no need to add treble response back into the mix. Its ultra slick, feed-forward compression design helps maintain high-end treble response like no other. Lastly, Tone Controls and Blend Controls only add noise in a compressor. Why add noise to a compressor circuit? 


  • Studio Quality Compressor and Limiting Amplifier Engineered for Guitar and Other Instruments
  • Featuring Same Great Professional Technology available in Keeley’s Bassist Limiting Amplifier Pedal
  • High-Fidelity Sound and performance compression
  • THAT Corp. 4320 Based
  • High Performance Voltage Controlled Amplifiers
  • True RMS Detector
  • Ultra High Performance Op-Amps
  • Handles Large Signals with ease
  • Output Voltage Gain: +30dB Boost
  • Incredible Bandwidth of over 20 KHz
  • Low Noise (-95dBV)
  • Total Harmonic Distortion: 0.1%
  • Limit Distortion/Clipping or Damage to Speakers
  • Timing Capacitor for True RMS Detection
  • Attack Times: Typically 15ms for 10dB, 5ms for 20dB, 3ms for 30dB
  • Release Times: Typically 8ms for 1dB, 40ms for 5dB, 80ms for 10dB, 160ms for 20dB, 240ms for 30dB
  • Dual LED Indication for Threshold
  • True Bypass Switching
  • Keeley Quality Engineering
  • 100% Made in Edmond, OK, USA

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  • True Bypass
  • Current Draw: 15mA
  • Input Impedance 1 Meg ohm
  • Output Impedance: 100 ohm
  • Width (Not Counting Jacks) – 2.35″
  • Height (Not Counting Jacks) – 4.41″
  • Standard 9V DC battery and 9V DC (center-negative) connection

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