TK Audio BC501-GR 500-Series Stereo Bus Compressor

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Product Code: 2427
TK Audio BC501-GR
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TK Audio BC501-GR 500-Series Stereo Bus Compressor

The TK Audio BC501-GR 500-Series Stereo Bus Compressor is one of the most transparent stereo bus compressors ever made.

The smooth, soft compression together with the blend control, high-pass filter and the THD function are much appreciated features that now have been expanded with the grab function, known from the BC1-THD. The grab function turns the threshold knee harder and makes the compressor even more perfect for the drum-bus.

TK Audio BC501-GR 500-Series Stereo Bus Compressor Features

  • External sidechain input via a stereo 3.5mm TRS (unbalanced stereo)
  • THD circuit that adds even harmonics
  • Blend control from dry to compressed in 41 steps
  • Selectable grab function which offers a harder threshold knee.
  • Three HPF frequencies; 80Hz, 150Hz and 220Hz.
  • Selectable THD function for more “even” harmonics.
  • Smooth blend control for parallel compression.

TK Audio BC501-GR 500-Series Stereo Bus Compressor Specifications

  • Power requirement: +120mA / -100mA (total)
  • Frequency response: 20Hz to 20kHz +/-0dB
  • 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)
  • Grab: selects a harder threshold knee

TK Audio BC501-GR 500-Series Stereo Bus Compressor includes

  • BC501 500-Series Stereo Bus Compressor
  • Manual
  • 2 year warranty

What We Think

The TK Audio BC501 500-Series Stereo Bus Compressor comes off in the vein of a loved buss comp (from a well known British console). The BC501 is a relatively natural sounding comp, with a slight bit of pleasing roundness (or maybe a slight softness) to it. The more you push it, you will hear it get a little thick and punchy, but it is never over the top. You can get it to tighten things up very well, and add an overall glue to a mix or drum buss. Add in the THD feature and you can add a nice attitude that pushes the sound in a fun direction. I really liked that for rock and rap (more up beat and energetic music). More than anything else though, I love the blend knob. Being able to do parallel compression at the unit makes this comp nicely flexible.

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  • 5

    Posted by Preston Scott on Apr 15th 2020

    One of the best purchases I've made. This is the 500 series of a compressor called the magic glue for a reason. The sound is phenomenal and I'm not into exaggerating when it comes to gear. It can go from smooth to aggressive and yet still sound musical. There is a lot of control over the sound and I even use across the 2 bus during mix downs. A purchase you won't regret at a price that's well worth it.