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Tube-Tech

collapse expand iconDescription

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.

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 stabilized.
Tube-Tech SMC 2BM Mastering Multi-Band Compressor

collapse expand iconFeatures

  • The world's only "all tube based" multiband compressor design
  • Three bands per channel with variable crossover frequencies between bands
  • Stereo sidechain with variable Threshold, Ratio, Attack, Release and Gain controls for all three bands
  • Master Output Gain (off to +10 dB)
  • Balance Control (+/-1,5 dB)
  • LED display showing compression
  • Freq. response @ -3 dB: 5 Hz to 60 kHz
  • Low noise: < -60 dBu @10 dB gain
    Potentiometers with 31 detents for Threshold, Ratio, Attach, Release and Balance
  • Gain controls with 12 positions gold plated switches
  • Frequency switches with 6 positions gold plated switches
  • Clickless bypass relay

collapse expand iconSpecs

  • Input Impedance: 2k ohm
  • Output Impedance: 60 ohm
  • Frequency response @ -3 dB: 5 Hz to 60 kHz
  • Distortion THD+N @ 40 Hz: 0 dBu 0.15 %, +10 dBu 0.15 %
  • Noise Rg=200 ohm: 22 Hz-22 kHz; -70 dBu (Output Gain @ 0dB ), -60 dBu (Output Gain @ +10 dB): CCIR-468-4; -60 dBu (Output Gain @ 0dB), -50 dBu (Output Gain @ +10 dB)
  • Cross talk @ 10 kHz: -40 dB
  • CMRR @ 10 kHz: -60 dB
  • Max. output @ 1 % THD+N: > +26 dBu
  • Gain Output: of-1 to +10 dB; Low-, Mid-, & High band; -1 to +10 dB
  • Tracking between channels: 0,1 dB
  • X-over frequencies: Low & Mid band: 60, 100, 200, 300 Hz (x1); 0.24, o.4, 0.54, o.8, 1.0, 1.2 kHz (x4)
  • Mid & High band: 1.2, 2.0, o.3, 4.0, 4.8, 6.0 kHz (x1)
  • Compressor Ratio: 1.5:1 to 10:1
  • Compressor Threshold: off to -20 dBu
  • Compressor Attack: 3 ms to 200 ms
  • Compressor Release: 60 ms to 2 s
  • Tubes: ECC 81 4 pc, ECC 82 2 pc. ECC 83 2 pc
  • Dimensions H x W x D: 5.2" x 19" x 8.1" (132 mm x 480 mm x 205 mm)
  • Weight: 13.7 lbs (6.2 kg)
  • Power requirements @ 115 V/230 V, 50-60 Hz: 30-45 W