Empirical Labs DocDerr 500 Series Instrument Channel Strip Reviews
Empirical Labs created the DocDerr 500 Series channel strip module to give your signal impressive punch in any mix - and to put you in complete control. The DocDerr includes a low-noise preamp that gives you up to 16dB of gain, and that's just the beginning. In addition to a 3-band parametric EQ (with selectable highpass filter), you get an onboard tape-emulation circuit, compression, and a Mix knob. This knob lets you blend the uncompressed signal with the saturated, compressed signal. You also get a handy "Bad!" hard-clip indicator on the DocDerr.
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Highest Rated Reviews
Amazing EQ/Comp/Tape Saturation
I own four of these. It's like have an API 550A plus a single knob FET compressor in one module. There is a mix knob that allows you to dial in exactly how much compression you want, so you can drive the compressor hard and then dial back towards the uncompressed Eq'ed signal. You can also turn off the compressor and just use it as an EQ/tape saturation circuit. HP filters also very useful. Then there is also the stereo linking, which is made easier if you have a chassis that can enable/disable linking. Possibly the most underrated 500 series module out there.