Keeley 4 Knob Compressor s/n 18613 USA in very good condition. Thoroughly tested and in perfect working order.

Keeley 4 Knob Compressor – Voted 2004 Guitar Player Magazine’s Editor’s Pick Award.

Keeley’s most popular pedal, the Keeley 4 Knob Compressor has become an industry standard for stomp box compression. The sound will inspire, and your music will flow freely-just plug the compressor pedal in and let your head, heart, and fingers fly. The sound quality of the Keeley compressor is rarely heard in the stompbox arena and is only seen in very expensive rackmount or tube equipment.

The Keeley 4 Knob Compressor is a true audiophile and studio-grade compressor, with exotic rack mount-quality in a stomp box. The Keeley compressor pedal ships with the 9V DC jack at the top end of the guitar pedal and use the same type of power supply used by nearly all guitar effect manufacturers.

The Sustain Control
The 9 O’clock position should be barely noticeable. It will just take out really loud sudden peaks, this is great for protecting your speakers and the like. The 12 O’clock position provides the right presence for using the Keeley compressor pedal continuously while performing. The 3 O’clock position is great for solos. It really adds some cool effects to your playing dynamics. Only when really cranked do you get the pluck sound of your pick emphasized.

Attack Control
The compressor pedal has an Internal Attack control, designed for bass players with high-output active pickups or active pedal boards with buffers.

Clipping Control
The Keeley compressor pedal also has an Input Sensitivity Control, meaning you can use this in your studio to run keyboards, drum machines, drum mics, even master recordings and other line-level uses. You’ll raise your signal to a new level of sonic awesomeness.

True bypass switching circuit
True bypass means that when the effect is off your guitar tone will not be affected at all. The true bypass circuit makes sure you have absolutely no tone loss or signal reduction through the compressor pedal in the off/bypass mode. This switch makes sure you have absolutely no tone loss or signal reduction through the Keeley 4-knob compressor even in the off mode. Other compressors use a cheap switch and design that runs down your signal even when off or if the battery goes weak.

Power supply

The DC jack is the standard type fitting just about every power supply out there. The Voodoo Labs Pedal Power, MXR DC Brick, Boss, Ibanez, etc. power supplies work perfectly with the compressor

The Keeley 4 Knob Compressor is built in the USA and each unit is tested to ensure that there are no failures.