Keeley Electronics Compressor Pro

Keeley Electronics Compressor Pro

World Renown Keeley Compression

Full-featured studio-quality compression in a stompbox

Keeley Compressor Pro. The stomp-box-sized compressor/limiter is made in Oklahoma, USA and engineered to be an indispensable tool for your musical endeavors. It is in no way limited to be used with only guitar. It has been designed to work as a studio compressor accepting any range of inputs and a frequency response and noise level matching the finest compressors made.

Main Features:

• Compressor Limiter effect pedal
• Fully adjustable
• Exact RMS analysis – senses thrue RMS value of input signals
• 7 Segment LED display for fast and accurate metering of gain reduction
• Bi-Color Threshold LED indicator
• 2 compression modes
  • Hard Knee – for limiting or adding sustain orm ore noticeable compression
  • Soft Knee – for gradual, more subtle and lively sounding compression
• Auto Mode – provides natural sounding compression with automatic attack and release setting
• Pedalboard-friendly size – for compact rigs
• True-Bypass switching
• Made in Edmond, USA
• Powered by a regular 9V DC PSU
  (centre -, 2,1 mm, low ~10 mA current draw)

The Keeley Compressor Pro is designed to be used at home or in the studio for creating full sounding recordings of any instrument. In live situations, the Compressor Pro can be used to achieve full sounding, polished performances as well as protect amplifiers and speakers from overload. The Comp Pro is designed to work with any instrument from voice and guitar to keyboard, bass, or drums. Use it when creating a podcast or YouTube videos to maintain professional performance levels. Use it around the home to create tons of sustain while at low volumes or low gain settings!

The Threshold is adjusted to determine when the compressor is working or when sound is being passed through unaffected. The Threshold control is turned down or CCW until the THRESHOLD LED turns Red as you play your instrument. When the THRESHOLD LED turns Red the Comp Pro is actively compressing your signal. If the LED is Green, the Comp Pro is not compressing and sound is passed through unchanged.

The Compressor Pro’s Ratio Control – “the Compression Knob”, controls the amount of compression you set the Comp Pro for. You can set it from No Compression (1:1) when all of the way off or CCW. You can set it as high as Infinite Compression (∞:1) which means that the output level will never increase in output level no matter how loud the input. This type of setting can be used for hard-limiting to protect recording or speakers or in some cases for guitar effects like chicken-pickin’.

Compressor Pro offers Attack times between 0.15ms and 150ms.Attack Controls the time it takes for the Comp Pro to start compressing.
On the other hand Release times between 0.1s to 3s are possible – this controls the time before the Comp Pro releases or stops compression.

Gain is the output level of the compressor. It does not affect the compression controls like THRESHOLD, RATIO, ATTACK or RELEASE. It is for make-up gain if you set for heavy compression gain reduction. +20dB of boost is possible.

Hard Knee Compression follows a hard fast rule: If THRESHOLD is met, then Compress at this RATIO. Soft Knee is Komfort Kompression. It’s a way to keep compressed guitar or instrument parts sounding lively and dynamic, without the “blanket” of compression found in many types of compressors.

Setting the Auto switch to ON will work in most cases and automatically sets Attack and Release Times for a very natural sound. The Comp Pro looks at the input signals like guitar, bass, vocals or drums and determines the correct attack and release times depending on what you’re playing and what signal levels are being detected.

Never leave home without your Keeley Compressor Pro – it makes the perfect booster or driver for your rig! You can always set the RATIO control for 1:1 compression (otherwise known as No Compression) and use the GAIN to push your amp, pedals, speakers, or other guy out of the way! Once you have learned your new Comp Pro there will never be a reason not to use it.