GC Audio 500 Density Compressor Handleiding

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GC Audio 500 Density Compressor:

Thank you for purchasing the Density Compressor.

We hope you have as much fun using it as we had designing it !

Warning : When you remove the module from an 500 rack, never pull on the electronic card,

always pull from the front face.

The GC Audio Density compressor is a complete VCA Compressor.

The balancing and unbalancing stage consists of Lundhal transformers which remains to this day the only

way to perform common mode rejection without adding distortion. The follower OPA have been chosen for

optimal operation of the VCA.

Great care has been taken in the choice of capacitors. Each coupling and decoupling link is optimized for an

impulse response. The low values are ensured by Wima plastics and the higher values by Long Life low

ESR electrolytic.

The output balancing stage consists of a Lundhal high level Output transformer preceded by a solid low

output impedance current generator stage.

The few uH generated naturally by the output coil of the transformer brings density and a feeling of

proximity.

No sound goes through the front panel switches, each switch drives gold contact mechanical relays or ultra

low R-On solid state relays.

The result is a responsive, quiet compressor with lots of character.

Technical data :

➢Threshold : -30dB / +10dB.

➢Ratio : 1 / 20

➢Attack : 0.1ms / 15ms

➢Release : 1.5ms / 150ms

➢Output gain : -20dB / +20dB

➢HP filter side chain : 20Hz / 200Hz

➢Auto time setting with « brick wall » limiter curve

➢Knee setting

All measurements are made with Audio Precision device, Z input = 100K Ohms :

THD + N @ max gain = 0.05%

Noise = -81 dBu @ max gain (150 Input Load – 20Hz/20Khz)

Product specificaties