Yamaha GC2020BII 2 channel Compressor/Limiter

This unit is in fair condition cosmetically.  The controls & switches all have been cleaned to correct a few noisy pots.  The weak spots for this model are the metering and the use of 4 Omron relays in the signal path (Power and bypass activated).  These relays have been exercised and retested and are working fine.  

Please note there are some defects to the black anodized finish along the top edge of the front panel, along with some rust on the bottom cover.  

Frequency Response: 0, +1, -3 dB 20Hz ~ 20kHz @ +4dB

Total Harmonic Distortion: Less than 0.05% @ +4dB 20Hz ~ 20kHz

Hum & Noise (Rs= 150n): -85dB (12.7kHz 6dB/oct LPF Weighted, Average)

-83dB (DIN AUDIO Weighted, Average)

-87dB (I HF-A Weighted, Average)

Maximum Voltage Gain: +24dB (Input Level SW at -20dB, 0utput Level SW at +4dB)

Compression Ratio: 1 : 1 ~ 1 : infinity (Maximum limiting 32dB)

Compressor/Limiter Threshold Level: +20 ~ -35dB (Input Level SW at +4dB)

(Input Control at 0 : +20 ~ +5dB)

(Input Control at Center: +20 ~ -20dB)

(Input Control at 10: +5 ~ -35dB)

-4 ~-59dB (Input Level SW at -20dB)

(Input Control at 0 : -4 ~ -19dB)

(Input Control at Center: -4 ~ -44dB)

(Input Control at 10: -19 ~ -59dB)

Expander Noise Gate Threshold: 0 ~ -80dB (Input Level SW at +4dB)

(Input Control at 0 : 0 ~ -40dB)

(Input Control at Center: -25 ~ -65dB)

(Input Control at 10: -40 ~ -80dB)

-24 ~-104dB (Input Level SW at -20dB)

(Input Control at 0 : -24 ~ -64dB)

(Input Control at Center: -49 ~ -89dB)

(Input Control at 10: -64 ~ -104dB)

Attack Time:    0.2 msec ~ 20 msec   
Release Time:    50 msec ~ 2.0 sec

Controls (Per CH): Input/Output Level Control
Exp. Gate Control (with ON/OFF SW)
Comp. Ratio
Attack Time
Release Time
Comp IN/OUT SW

Controls: Power SW

Link SW (Stereo/Dual Mono)
Input Level SW (+4/-20dB)
Output Level SW (+4/-20dB)