Product Description
The Keeley Bassist Compressor, first introduced at the 2014 NAMM
show, is expected to be released late October 2014! Yes, just a few
weeks away!
BASS COMPRESSION
The Keeley Bassist Compressor provides true high-fidelity compression
and limiting. Be heard and felt using performance compression by Keeley
Engineering.
The Bassist Compressor is built around the exotic and extremely high
fidelity THAT Corp. 4320. Think of it as very affordable studio-grade
compressor in stomp box format! It uses high performance Voltage
Controlled Amplifiers, on board true-RMS detector, and ultra high
performance op-amps to bring you the very best quality. VCA compressors
give you precise control. Therefore they are directly suited to bass
guitars. The Keeley Bassist Compressor is both musical and very
transparent. Where our older compressors were based on the CA3080 or
the LM13700 and are perfect for single coil guitars, the new Keeley
Bassist Compressor has no problems with active pre-amps and line level
input signals! Not only can the Keeley Bassist handle astonishingly
large signals, it has an incredible bandwidth of over 20 KHz and
incredibly low noise. No detail in your bass guitar’s tone will be
lost. The Keeley Bassist will be a sound investment in your tone, you
now have rack-mount quality at your feet.
Compression and Threshold
When bass players use the Keeley Bassist Compressor they will be
greeted with a sound that is more easily amplified and heard. Using the
effect as a limiting amplifier saves your speakers from
clipping and distortion. Set the Threshold to look for peaks in your
signal and limit distortion from your amplifier or damage to your
speakers. Simply watch the Threshold Indicator light to see what type
of playing you want to limit, it’s that easy! Next set the Compression
Ratio Control to determine how much squash you want when the signal is
above Threshold. Set Compression all of the way down for no (1:1)
compression and use the Gain control as a boost! Set Compression all of
the way up for an above-Threshold hard-knee limiter.
A typical soft compressor setting would be 2:1 above threshold. A
good starting ratio for the Compression control may be 4:1 as it
generally sounds good with bass guitar. A ratio of 5:1 or 6:1 will
sound great for slap or funk-style playing. For synth-bass try 10:1
Compression.
Attack and Release
There is a certain figure that just sounds good as far as compression
goes; and that’s 125 dB/second. With feed forward compressors that use
this type of true-RMS detector you use a single time constant
parameter. The timing capacitor gives you attack and release times that
are adaptive to your playing level or the signal input to the
compressor. Bottom line: Attack and Release times vary on program
content. Attack times are generally speaking, about 100 times faster than release times.
Attack Time: typically 15ms for 10dB, 5ms for 20dB, 3ms for 30dB
Release Time: typically 8ms for 1dB, 40ms for 5dB, 80ms for 10dB, 160ms for 20dB, 240ms for 30dB
Specs:
Voltage Input: 9.6V
Current Draw: 15mA
Input Impedance 1 Meg ohm
Output Impedance: 100 ohm
Output Voltage Gain: +30dB Boost
Bandwidth > 20kHz
Total Harmonic Distortion: 0.1%
Noise: -95dBV
Threshold Indicator: Dual LED