The CP4500 is a Stereo bus compressor based on the design that was originally used in a legendary British console, adapted to the '500' format of API*. It is famous for adding punch and glue to the mixes.
The CP4500 adds a few features to the original such as an equalizer in the side chain with three high-pass frequencies and a high boost section which enhances the spectral balance of the output. It also adds a Mix knob that allows mixing blending dry and wet signal for parallel compression.
1 RATIO Rotary switch that sets the compression ratio to 2, 4 or 10.
2 ATTACK Rotary switch that sets the attack time from 0.1 to 30 milliseconds.
3 HP Inserts a 50, 100 or 200 Hz high-pass filter in the side-chain. Produces a Fat sound and eliminates bass driven pumping.
4 RELEASE Rotary switch that sets the release time from 0.05 to 1.2 second. The AUTO position is a program dependent automatic release time.
5 Meter Analog meter displays the dB gain reduction.
6 IN Compressor bypass (hardware by relay).
7 THRESHOLD Potentiometer that sets the input level at which compression begins.
8 HF LIFT Inserts a high boost filter in the side chain. Combined with the High-Pass it evens the audio energy in low and high bands and gives a very natural sounding to the compressed output.
9 MAKEUP Potentiometer that restores the signal level after being compressed (make up gain).
10 MIX Potentiometer that mixes the direct unprocessed signal with the compresses signal (0 to 100%) for parallel compression.
You bring the solder (use good quality solder, 1mm diameter max) and the Lunchbox.
The CP4500 kit is a medium difficulty kit. Nothing difficult but a rather large number of components.
The setup is simple but requires using a good quality AC voltmeter.
XT500 Extender: The XT500 option is a cable extension that allows you to test and setup the module outside the lunchbox while connected.
501 Case: The 501 case option is a standalone, single slot lunchbox with PSU.The XT500 Extender is not needed with the 501.
Assembled Product: If you prefer not to DIY, choose an Assembled product. It comes fully assembled, ready to use.
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