Keeley Compressor Pro
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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.
Introduction of Features
Compression LED Display – 7 Segment LED display for fast and accurate metering of compression and gain reduction. Gain Reduction Levels of -1dB to -20dB are indicated.
Threshold LED Indicator – Bi-Color LED to indicate when compression is initiated and released.
Exact RMS Analysis (ERA) – Senses the true RMS value of the input program material such as your guitar, bass or drum machine.
Hard/Soft Knee Compression – Hard Compression for limiting or adding sustain, soft knee or Komfort Kompression for gentle compression, keeping performances lively and natural sounding without potential phase issues in parallel, or blending style compression.
Auto Mode – Program dependent Attack and Release times. Set to Auto ON for worry-free performance and automatic Attack and Release times.
True-Bypass – No tone or signal loss when OFF
General Compressor Usage
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!
THRESHOLD, RATIO, ATTACK, RELEASE, GAIN, KNEE, & AUTO
THRESHOLD Control and LED – This is probably the most important control on the Comp Pro. It 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.
Range of Adjustment is from -50dBu to +10dBu. 2.45mVRMS to 2.45VRMS – Pro Audio (studio) Levels are +4dBu Consumer Audio Levels are -10dBu. Passive guitar or bass pickups are typically about -25dBu to 2.5dBu.
RATIO Control – “the Compression Knob”, Ratio is 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’.
ATTACK Control – Attack Times between 0.15ms and 150ms. Controls the time it takes for the Comp Pro to start compressing.
RELEASE Control – Release Times between 0.1s to 3s. Controls the time before the Comp Pro releases or stops compression .
GAIN Control – This 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.
KNEE Switch – Hard Knee/Soft Knee. 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.
AUTO Switch – OFF/ON – Set to ON in most cases for automatic setting of Attack and Release Times. This will sound natural and work in a very large number of cases. 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.
Good Compression Settings
SMOOTHING – Changes in signal level happen when the singer moves away from the microphone or when a guitar player may not use perfect technique in controlling their dynamics, i.e. less than perfect picking hand technique. To smooth changes in dynamics use the Comp Pro for low to medium compression. Set AUTO Switch to ON. Adjust the Compression RATIO Control to 2:1 to 4:1 for example. Set the Gain Reduction LEDS by adjusting the THRESHOLD Control to indicate 3-9 dB of gain reduction on the 7 Segment LED Bar. Adjust GAIN Control if needed. Set KNEE Switch to SOFT. Now play slow and steady chord work, list to how toggling the KNEE switch back and forth Hard/Soft affects your tone and the attack or punch of the notes as well as the release.
SUSTAIN – To add sustain to guitars or keyboards start with a higher Compression RATIO setting for example 10:1 to ∞:1, Set THRESHOLD Control so that THRESHOLD LED turns Red for average level of your guitar or performance, the LED stays red about half the time. You can set the KNEE Switch to HARD or SOFT, SOFT may seem more transparent.
CHICKEN PICKING COMPRESSION – Set RATIO Control to 5:1 to 10:1, a quick RELEASE Time of .5s to 1s. ATTACK Time for quick attack 10-50ms and THRESHOLD Control set to give you 9-12dB of Gain Reduction/Compression on the 7-Segment COMPRESSION LED Array. This will typically give you compression artifacts or effects like a breathing or pumping sound.
BASS BOOM AND SLAP – For a punchy bass guitar sound set the Comp Pro for a medium to high Compression RATIO (6:1 to 10:1) and adjust the THRESHOLD so that the -12dB and sometimes -20dB COMPRESSION LEDs are lit while playing. Set KNEE to Hard mode. That will make the bass punchy and slap a bit harder, reducing boominess. Try Soft KNEE for a a different feel. Set AUTO On.
PREVENT DIGITAL DISTORTION – Set Keeley Compressor Pro as a Hard Limiterby turning RATIO control all of the way up to Infinity to One compression ratio. Set KNEE for Hard. By adjusting the final Gain level to your clipping lights on the digital recorder, you can insure you won’t ruin recordings or get unwanted distortions.
SPEAKER PROTECT (Concerts, Churches, Sound Systems and P.A.s) – You can use the compressor as above as a Hard Limiter. If when playing you hear distortions from your sound reinforcement equipment you can reduce the THRESHOLD, increase RATIO, and reduce GAIN to achieve perfect results. This is where it might be nice to use your Keeley Compressor Pro as the last effect in your signal chain as it can prevent different effects from getting too loud or being added together to drastically increase output volume.
NEVER LEAVE HOME WITHOUT YOUR KEELEY COMP PRO – The Compressor Pro 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.
All New products are covered by the manufacturers new warranty. Please check their website for the length of warranty and warranty conditions.
If an item you receive is faulty get in touch with us ASAP.
Second Hand products come with a 4 week warranty from us. If there is an issue let us know ASAP!
This covers normal use and does not cover accidental damage, misuse, wrong power plugged into it, modding, water damage or any other damage caused by mistreatment.
Just treat it nice and all will be good!
We send A LOT of packages every week so don't worry about the shipping side of things!
We've never lost a thing and your awesome new gear will be packed up really well to avoid any damage in transit.
If your order comes in before 2pm we will ship it same day. Most of the time we pack things up all the way to 4pm so just call if you need it to leave same day after 2pm.
We ship mainly with Australia Post but may use a courier depending on location and size of the package.
Free Post ships with Australia Post standard and expected shipping times are between 4-6 business days depending on location. It will be longer to outside of metro and rural areas.
Express Post will usually be with you next business day in metro areas of QLD, NSW, SA, VIC and TAS. WA will take 2 days to metro and extra days after that to out side metro and rural areas.
Everything we ship has a tracking number with the exception of some power cables and smaller envelope packages. You will be emailed tracking once your order has been shipped!
"LOVE IT Or Exchange It Within 14 Days"!
The item MUST BE sent back in the same condition it arrived in and have all the materials it arrived with (manual,warranty card,all accessories) and be packaged in the original box.
Items returned in undesired condition (scratched,chipped, etc) will be subject to a restocking charge of up to 30%. Modded items will not be refunded!
Postage must be paid by the purchaser to get the item returned to us and we will exchange at our discretion the amount of the products but not the postage costs.
Items must arrive here within 14 days of your order being placed.
Some items cannot be returned like Pedalboards you have already put velcro on, strings, pedalboard tape, Cables and DIY cable kits.
Please don't use the Manufacturers box as the packing box or you will automatically be charged a 30% restocking fee!
Email us BEFORE returning your items so we can resolve or sort out any problems you may have and just so we know to expect the item. You may also want to insure or register your item as we don't take responsibility for lost or damaged post.