TUBE-TECH SMC2BM

Stereo Multiband Compressor

SMC2BM

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The TUBE-TECH SMC 2BM Stereo Multiband Compressor features three independent optical stereo compressors.
The signal is divided into three bands (Low, Mid & High) by 6 dB/octave x-over networks with 12 selectable frequencies: 60 – 1200 Hz for Low/Mid band and 6 selectable frequencies: 1,2 – 6,0 kHz for the Mid/High band.

Switchable crossover points ensure precise control of all three bands of opto-compression.
Independent band specific Threshold, Ratio, Attack, Release & Gain parameters make the SMC 2BM as flexible as it is accurate.
Gain controls are fitted with 12 position gold plated switches with 1dB/step. Threshold, Ratio, Attack, Release and Balance controls are fitted with potentiometers with 31 detents.

The design of the x-over networks optimizes the summing of all three bands, resulting in a flat frequency response (within +/-0,25 dB), when the gain controls for each band are set at the same level.
The three compressors feature Threshold, Ratio, Attack, Release and Gain and a display showing gain reduction. Master levels are set with Output Gain and Balance controls.

Both Input and Output are balanced and have fully floating transformers with a static screen. The power supply and the sidechain circuit is based on a solid state circuit. With the exception of the output stage all DC voltages are stabilised.

SMC2BM Technical Features

  • The World’s only all-tube multiband compressor design
  • Low distortion optical gain reduction elements
  • Frequency response: @ -3 dB: 5 Hz to 60 kHz
  • Low noise: < -60 dBU @ 10 dB gain
  • CMRR: > 60 dB @ 10 kHz
  • Three bands per channel with variable crossover frequencies
  • Variable threshold, ratio, attack and release for all three bands
  • Master output gain: Off to +10 dB
  • Balance Control (+/-1,5 dB)
  • LED display shows compression
  • Clickless In/Out relay
  • Conductive plastic potentiometers
  • Gain Control for each band
  • Gold plated switches (SMC 2BM
  • In- and outputs are transformer balanced and fully floating