Key Features:
Smooth VCA-based buss compression
Provides the magic glue effect on mixes
Extended ratio, attack and release controls
Side-chain input and filtering
Blend control for parallel compression
Single or dual side-chain detectors

Specifications: AP2 30
Noise flooor: below 104dBm
Frequency response:  20Hz to 20kHz less than -0,025dB
Frequency response: 20Hz - 80kHz less than -0,3dB 
Blend control fully CW (comp)
THD+N @ 0dBu: less than 0,0045%
THD @ 0dBu: less than 0,001%
THD+N @ +26dBu: less than 0,02%
THD @ +26dBu: less than 0,02%
Blend control fully CCW (straight)
THD+N @ 0dBu: less than 0,00045%
THD @ 0dBu:
THD+N @ +26dBu: less than 0,0003%
THD @ +26dBu:

Input impedance: 40kohm
Output impedance: 50ohm
Max input level: +26dBu
Max output: +27dBu @ 600ohms load


Threshold:  -20dB to +20dB
Ratio:  1.5:1 / 2:1 / 4:1 / 10:1 / Hard
HP Filter:  150Hz, -6dB octave
External sidechain: in/out
Dual or single sidechain detectors
Attack: UF(ultrafast) /0.1/0.3/0.6/1/3/10/30/60/120mS
Release:  50mS/100mS/300mS/600mS/1.2S/Auto
Gainreduction meter
Make-up:  0 to +20dB
Compression in/out
Straight signal mute
Blendcontrol: from straight to compressed
External sidechaininput: Unbalanced TRS jacks

Internal, regulated powersupply with a toroidal transformer
115 or 230V, selectable.

BC1-S updates:

New outputstage, unbalanced/balanced auto sens.
All controls stepped
New illuminated in/out switch
Mains on/off on front