500 Series Compatible Module Compressor/Gate ■Features - Legendary SSL 4000 B Series channel strip circuit design - Compressor ratios are 2:1 / 4:1 / 10:1 / "ds". - Automatic make-up gain with RATIO control. Triggered by sibilance, the "ds" setting has fast attack and release times, making it effective over a wide frequency range. - "OUT" setting allows bypassing the gate/expander - LINK sidechain prevents image distortion of the stereo signal The SL 4000 B studio large format recording console, released in 1976 during Solid State Logic's early days, is a legendary console that can be said to be the console that started it all for SSL, with only six units manufactured as the prototype for the SSL 4000E console that was later introduced to recording studios around the world. Famously installed in the "Stone Room" of London's Townhouse Studios in the late '70s and early '80s, this console was used to record many famous songs, including Phil Collins' "In the Air Tonight," The Buggles' "Video Killed the Radio Star," and Peter Gabriel's "Intruder." Its unique sound quality is part of the iconic sound of many hit songs of the time. The B-Series Dynamics Module is a 500-series modular channel compressor based on the original circuit design of the SSL 4000 B console channel strip, with a more aggressive character. The B-Series Dynamics Module consists of a compressor/limiter and an expander/gate. ■A compressor with a unique sound signature and aggressive character The B-Series Dynamics Module features a compressor/limiter with three fixed step compression ratios: 2:1, 4:1, and 10:1, plus an additional "ds" mode. The "ds" setting is a fixed 10:1 with an added sidechain filter. Due to the different topology, the B-Series Dynamics Module offers a more distinctive and colorful Dynamics processor than the E-Series. The Gate/Expander functions as a 20:1 gate, or as a 2:1 expander when the EXP button is pressed. The OUT setting also allows the Gate/Expander to be bypassed and function as an independent compressor. The B-Series Dynamics Module circuitry is based on the legendary original circuit design of the SSL 4000-B Series Channel Strip, which produced the iconic sound of the 80s.