Becos CIQ-2 COMPIQ MINI PRO Manual
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CIQ‐2 COMPIQ MINI PRO COMPRESSOR PEDAL
MANUAL
SPECIFICATIONS
Input impedance: > 1MΩ
Output impedance: ~100Ω
Ratio: 1:1 to inf:1 in Feed Forward, 1:1 to 10:1 in Feed‐Back
Threshold range: ‐40dBu to +10dBu
Gain: ‐6dB to +20dB
0dB input reference level: FF = ‐26dBu (50mV), FB = ‐28dBu (40mV)
THD: <0.1% 1kHz, 0dBu in/out, 600Ω load, 24KHz BW, 12VDC power,
th
through 6
harmonic
Max Input Level: +5.5dBu
Max Output Level: +5.5dBu
Output frequency response: ‐2dB @ 40Hz; 0dB @ 100Hz ‐ 22KHz
Optimal power voltage: 9‐12VDC ±10% Center Negative
DC power plug: Ø 5.1/2.1mm, 12mm long Barrel
Power consumption: < 38mAh
Product size: Length: 39mm, Depth: 92mm, Height: 51mm
Product weight: 165 gr.
Packed weight: 190 gr.
ADVICE, WARNING & CAUTIONS
‐ Read this manual and keep it handy.
‐ Do not place the pedal & batteries in direct sunlight, in extreme
temperature and humidity conditions, or in dusty environment.
‐ Do not modify the circuit inside and avoid product physical abuse.
‐ We may change product's specifications, design, and its features
without notice, including the content of this manual.
INTRODUCTION
Thank you for choosing the CompIQ MINI Pro Compressor as dynamic
processing tool for your electric instrument and audio production. The
MINI is an all analog studio grade compressor/limiter featuring the top
of the line 4320 THAT Analog Engine® which incorporates a true RMS‐
level detector and a high performance Blackmer® VCA at the core of
a powerful set of controls: Ratio, Threshold, Make‐up Gain, Soft/Hard
Compression Knee, Fast/Slow Auto Attack & Release Timings, and a
Dry/Wet Mix for blending processed and clean signals. Additionally, a
Side Chain selector sets for Feed Forward (FF) or Feed‐Back (FB)
compression, both of which being served by a variable Side Chain
Filter that controls how to respond to the higher (or lower) amplitude
of the low‐frequency range of the signal. The amount of dynamic
processing is indicated by a 5‐LED Gain Reduction Display. The
CompIQ MINI can be used with any electric instruments such as
guitars, basses, keyboards, electric violins and cellos, etc., or acoustic
instruments like guitars, violins, cellos, or brass instruments like
trumpets, etc., and even for voice processing when used with a
microphone preamp.
FOOTSWITCH ‐ When engaged, the switch routes the audio signal
through the compressor and Power LED is lit Green. When pushed
again, the signal is True Bypassed from Input to Output, hard wired
and untouched. The mechanical switching is usually silent but
occasionally pops can occur, depending either if other devices in the
signal chain are placed before or after the compressor or if switching
takes place while playing the instrument.
RATIO ‐ This control sets how much the audio signal that passes above
the set threshold is going to be compressed. For FF compression, it has
a continuous range starting from 1:1 ratio (for one unit of input signal
level equals one unit of signal output level and no compression is
applied) and up to Infinite:1. At 9'clock the ratio is 2:1. At noon the
ratio is 4:1 and at 3'clock it gets to 10:1 ratio, after which a 20:1 or
infinite:1 ratio is applied. In FB mode with Fast timing and Hard Knee
the compression can reach a maximum ratio of 10:1.
THRESHOLD ‐ This control sets the level where the input signal will
trigger the compression which is applied only to the portion of the
signal that passes above that threshold. Its high dynamic range spans
from ‐40dBu to +10dBu and is intended to serve both instrument and
line‐level signals. When set very low, it makes the compression kick in
immediately even for small input signals, especially in FB compression.
Set higher, it lets a good portion of the signal untouched. This is a very
powerful and responsive control because it allows the compression to
only affect the higher peaks of the signal while leaving the rest of
audio untouched. Raising the Threshold translates to a greater sound
transparency and an increase in output level, making some Make‐up
Gain (or mixing Dry/Wet signals) unnecessary. This in turn reduces
amplification noise at the output. When combined with high Ratio,
Fast Timing, and Hard Knee, the Threshold control is useful for hard
limiting. Soft limiting can be achieved when combined with Soft Knee
and Slower Timing. The position of the Threshold control gives an
indication of the strength of the input signal. With line‐level signals
the Threshold will sit more CW, while with lower instrument‐level
signals it may be dialed up more CCW. Boosting lows in the SCF
extends the threshold further down to ‐55dBu, raising the perceived
sensitivity of the compressor.
MAKE‐UP GAIN – Reducing the dynamic range of a compressed signal
results in lowering the average volume so recovery gain is needed to
match the output with the input level. The more compression is
applied the more recovery gain is needed to compensate, especially
in FF compression. At higher compression ratios the recovery circuit
must re‐amplify a very low signal and with more amplification more
noise is introduced. The Make‐up Gain control has also a different
function. By design, the FB side chain employed by the CompIQ MINI is
different from classic feed‐back side chain topology. Here, the variable
Make‐up Gain becomes part of the FB side chain circuit and is no
longer used only for compensating the gain reduction but also to vary
the level of the feed‐back signal sent to the RMS‐level detector. This
feature expands the range of compression adjustments which can
(and sometimes must) be combined with fine re‐adjustments for
Ratio, Threshold, Timing, Knee, Side Chain Filter and Mix to achieve
the desired dynamic feel along with balancing the average output
level of the compressor. Think creatively. Output level can be obtain
not only by amplifying with the Make‐Up gain but also by lowering
the Ratio, raising the Threshold, filtering lows with the Side Chain
Filter which leads to amplifying lows at the output, etc.
SIDE CHAIN FEED – The FEED switch sets the compressor's side chain
topology for Feed Forward (F) or Feed‐Back (B) types of compression.
Some FB and some milder FF compression settings can overlap in their
audible result in the sense that the compression effect may sound
similar for both modes. FB compression is more about the "feel" and
less about "precision", is smoother, less obvious, more airy, and less
punchy. In FB mode, Knee selection is less differentiated when
compared to FF compression where the Hard Knee effect is more
accentuated. FB compression may not be suitable for limiting. Slower
timing (plus Soft Knee) contributes even more to the smoothness of
FB compression. Note! When maximum Gain is used in FB mode,
small signals including buzz, hum or electromagnetic fields captured
by instrument pickups and/or cables could trigger the compression
because the RMS detector is fed with a very hot signal. This can
happen if the Side Chain Filter boosts the low frequencies of the
control signal, especially when dialed for maximum boost (fully CCW).
You may reduce the sensibility of the FB side chain by lowering the
Gain or/and Ratio, raising the Threshold, use Slower timing or/and
Soft Knee, trimming lows with the SCF, or a combination of these.