Yamaha GC2020 2-channel compressor / limiter (first version), 1984-1985, made in Japan

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Initially sold for ¥49,800

The Yamaha GC2020 is a high-performance 2-channel compressor/limiter that can be effectively used in recording, sound reinforcement, and other production applications. The GC2020 offers a wide variety of control features for precise tailoring of compression and limiting parameters, and it also features an expander type noise gate in each channel for effective noise reduction.

Further, the GC2020 offers all this with exceptionally high audio quality – full 20Hz to 20kHz frequency response and no more than 0.03% total harmonic distortion. Operation can be carried out either in stereo mode or, using the link switch, in dual mono mode, allowing to completely different signals to be processed using independent compression or limiting characteristics.

SPECIFICATIONS
CHANNEL 2-channel
MODE STEREO Mode/DUAL MONO Mode
FREQUENCY RESPONSE +2dB, -2dB, 20Hz ~ 20kHz
TOTAL HARMONIC DISTORTION Less than 0.03%
NOISE LEVEL Less than -87dB (IHF-A)
INPUT Unbalanced (RCA pin jack, 1/4" mono phone jack)
INPUT IMPEDANCE 30k ohms
NOMINAL INPUT LEVEL -10dB
MAXIMUM INPUT LEVEL +32dB (INPUT Level Control at minimum)
OUTPUT Unbalanced (RCA pm jack, 1/4" mono phone jack)
OUTPUT IMPEDANCE 600 ohms
NOMINAL OUTPUT LEVEL 10dB
MAXIMUM INPUT LEVEL +20dB
DETECTOR INPUT Unbalanced RCA pin jack
INPUT IMPEDANCE 30k ohms
MAXIMUM INPUT LEVEL +20dB
DETECTOR OUTPUT Unbalanced RCA pin jack
OUTPUT IMPEDANCE 600 ohms
MAXIMUM OUTPUT LEVEL +20dB
RATIO CONTROL 1:1 ~ ∞:1
MAXIMUM LIMITING 32dB
GAIN REDUCTION INDICATOR 5-Segment LED
COMPRESSOR/LIMITER THRESHOLD LEVEL CONTROL
INPUT CONTROL at 0 position +32dB ~ +5dB
INPUT CONTROL at Center position +20dB ~ -20dB
INPUT CONTROL at 10 position +5dB ~ -35dB
EXPAND NOISE GATE THRESHOLD LEVEL CONTROL
INPUT CONTROL at 0 position 0dB ~ -40dB
INPUT CONTROL at Center position -25dB ~ 65dB
INPUT CONTROL at 10 position 40dB ~ -80dB
ATTACK TIME CONTROL 0.2msec ~ 20msec
RELEASE TIME CONTROL 50msec ~ 2sec
POWER REQUIREMENTS
U.S. & Canadian models 120V, 60Hz
General model 110-120/220-240, 50/60Hz
POWER CONSUMPTION
U.S. & Canadian models 18W
General model 13W
DIMENSIONS (W x H x D) 480mm x 44mm x 235mm (18-7/8" x 1-3/4" x 9-1/4")
WEIGHT 3kg (6.6 lbs.)
* 0dB is referenced to 0.775V RMS.