Used Keeley Compressor Pro Effects Pedal.
Mint, with all original packaging!
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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!
Device
Controls
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 Limiter by 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. 😉