YAMAHA GC2020 COMPRESSOR/LIMITER in zeer goede staat!
Voor stereo or dual mono gebruik.

1985 review from Muzines:

Among the equipment currently being featured in adverts from retailers specialising in the home recording and PA markets, the dual mono/stereo switchable Yamaha GC2020 compressor/limiter is beginning to look very common indeed. On a specifications for price basis it's not hard to see why.

Another toughly engineered 19" rack mounting unit, the metal-clad GC2020 is (initially at least) quite a complex unit to come to grips with, but some user experience and Yamaha's handy operating guide soon allows you to explore its diverse potential.

Starting with the connections on the back, the stereo GC2020 features both conventional 1/4" jack sockets and RCA mini-jacks for input/output options, clearly marked as channels One and Two. Removable metal linking bars connect the 'detector' input/outputs for an external feed from other audio inputs. The front panel provides power on/off, stereo/dual mono and compression in/out on push buttons, followed by an LED ladder to show the gain reduction, and then colour coded rotary pots for exp. gate/threshold, comp ratio, attack, release, input and output. These latter controls are duplicated for channel two.

The main use of a compressor in a home studio is to hold back those infuriating peaks in signal levels which occur whenever you're trying to get a high level down on tape and a singer or player's dynamic peaks send you screeching into overload. You can't manually ride the level control fast enough to handle them, and so some means of auto compression or limitation of peaks is essential. Equally it can be used to increase sustain time on bass and guitar. Ideally a compressor should be smooth in its effect so that when used, it doesn't sound like you've got a gizmo of some kind in operation. In that respect the Yamaha performed admirably. Even at high monitoring levels through our JBL monitors with a massive Sunn power amp delivering the juice, the GC2020 sounded excellent. Certainly, even for really advanced home studios, the Yamaha performs beautifully, and we'd go as far as to suggest that it could even have a useful role in small to medium size professional demo studios.

A particularly useful feature of the Yamaha is the 'expander gate' - effectively a noise gate, which can be variably set so as to cutout unwanted noise levels when the compression/limiting isn't in operation. This feature makes the GC2020 especially handy for recording uses.

Another plus of the Yamaha is that it can be switched so that two separate signals can be input each receiving individual amounts of compression. Alternatively, it can be set for normal stereo, in which case you can use it very conveniently for handling a complete stereo send - possibly a whole mix-down.