Keeley GC-2 Limiting Amplifier Compressor Pedal
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Description
The Keeley Compressor GC-2 Limiting Amplifier. The same great professional compression/limiting technology available in our Bassist Limiting Amplifier, for musicians and compressor fans of all kinds!
Precision Compression
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 a 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 you the very best quality. This type of compressor gives you 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 you can throw at it. The Keeley GC-2 Limiting Amplifier is both musical and transparent. Where our 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 your guitar’s tone will be lost. The Keeley GC-2 will be a sound investment in your tone - you now have genuine rack-mount quality at your feet.
Compression and Threshold
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 your speakers from clipping and distortion. Set the Threshold to look for peaks in your signal and limit distortion from your amplifier or damage to your speakers. Simply watch the Threshold Indicator light to see what type of playing you want to limit; it’s that easy! Next, set the Compression Ratio Control to determine how much squash you want 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.
Attack and Release
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 you use a single time-constant parameter. The timing capacitor gives you attack and release times that are adaptive to your 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.
- Attack Time: typically 15ms for 10dB, 5ms for 20dB, 3ms for 30dB
- Release Time: typically 8ms for 1dB, 40ms for 5dB, 80ms for 10dB, 160ms for 20dB, 240ms for 30dB