Smooth transparent glue. Sidechain filter with three frequencies. Selectable THD function for more “even” harmonics. Grab function that selects a harder threshold knee. Blend control for easy parallel compression. All controls stepped for easy recall. Engineers call it “The Magic Glue” when the BC1-THD’s transparent compression strengthens mixes without compromising clarity. The BC1-THD provides smooth bus compression that applies for both mixing and tracking. The built-in blend control makes it easy to apply parallel compression by adjusting the blend of dry and compressed signal. A switchable sidechain filter can be applied which makes the BC1-THD less responsive to low frequency energy. The THD function adds more harmonics to the signal and the “grab” mode selects a harder threshold knee on all four ratio settings. Smooth and transparent compression will never go out of fashion. Specifications Frequency response: 20Hz to 20kHz less than -0,025dBFrequency response: 20Hz to 80kHz less than -0,3dBTHD+N @ 0dBu: less than 0,0045%Input impedance: 20kohmOutput impedance: 50ohmMax input level: +26dBuMax output level: +27dBu @ 600ohms load BC1 version historyBC1. Release October 2008BC1mk2. Higher internal voltage, updated signal path for lower noise, internal jumpers for unbalanced use to add 6dB output gain. (released in October 2011)BC1-S. New output stage, stepped potentiometers for Threshold, Make-up and Blend. (released in April 2013)BC1-LTD. 10 year anniversary version, individually numbered on frontpanel, silver panel. Three HPF frequencies, THD function and Grab function (harder knee) BC1-THD. As above version with standard black panel Features Threshold: -20dB to +20dBExternal sidechain: in/outRatio: 1.5:1 / 2:1 / 4:1 / 10:1 /HP Filter: 80Hz, 150Hz, 220Hz, -6dB octaveTHD: adds more even harmonicsGrab: selects a harder thres hold kneeAttack: /0.1/0.3/0.6/1/3/6/10/30/60/120mSRelease: 50mS/100mS/300mS/600mS/1.2S/AutoGainreduction meterMake-up: 0 to +20dBDry signal muteBlendcontrol: from dry to compressedCompression in/outExternal sidechain input: unbalanced TRS jacksInternal, regulated powersupply with a toroidal transformer115 or 230V, selectable
