TK Audio

BC501

500-series stereo bus compressor

TK Audio’s best-selling 500-series module, the BC501, is a stereo bus compressor that features all the power of TK’s flagship BC1-S. The new BC501 adds some more functions taken from the BC2-ME mastering compressor, such as additional ratio settings (1.25:1, 6:1), a THD switch that adds more even harmonics to the signal, and three HPF settings from which to choose (80Hz, 150Hz, 220Hz). All controls are stepped for easy, precise recall. A dedicated Dry/Comp knob allows blending between the original and compressed signals, and an external sidechain input (accessible via stereo 1/8″ mini TRS jack) is also provided.

Features:
  • Blend control for parallel compression
  • All controls stepped for easy recall
  • High Pass filter on the sidechain with 3 frequencies
  • Additional attack times and lower ratios
  • THD circuit that adds more even harmonics
  • Smooth compression
Specifications:
  • Power requirement: +110mA / -90mA (total) 
  • Frequency response: 20Hz to 20kHz +/-0dB 
  • Frequency response: 20Hz to 80kHz +0dB/-0.1dB
  • THD+N @ 1kHz: less than 0.005%
  • Signal to noise ratio: 95dB
  • Cross talk: -90dB
  • Input impedance: 24kohm
  • Output impedance: 50ohm
  • Max input level: +26dBu
  • Max output level: +27dBu
  • Threshold: -20dB to +20dB in 41 steps
  • Make-up: 0 to +20dB in 41 steps
  • Ratio: 1:25, 1.5:1, 2:1, 4:1, 6:1, 10:1
  • Attack: 0.1, 0.3, 0.6, 1, 3, 6, 10, 30, 60, 120mS
  • Release: 50, 100, 300, 600mS, 1.2S and Auto (50mS/2S)
  • HP Filter: 80Hz, 150Hz and 220Hz (-6dB/octave)
  • External sidechain input via a stereo 3.5mm TRS
  • THD circuit that adds even harmonics
  • Blend control from dry to compressed in 21 steps

Specifications and components may be changed or updated without further notice.