SMC-2B-Perspective

The TUBE-TECH SMC 2B 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 variable frequencies: 60-1200 Hz for Low/Mid band and 1,2-6 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 stabilised.

Also available in Mastering version: SMC2BM

Read a review of the SMC 2A

SMC-2B-Front (1)SMC-2B-Rear

Product Features

  • The world’s first “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
  • Conductive plastic potentiometers
  • Clickless bypass relay

Mastering Version Includes:

  • 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

Online Manual
High Resolution Image
SMC2BM High Resolution Image

Specifications

Impedance Input: 2 kohm
Output: < 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
Output Gain @ 0dB +10 dB
22 Hz-22 kHz: < -70 dBu, < -60 dBu
CCIR-468-4: < -60 dBu, < -50 dBu
Cross talk @ 10 kHz: < -40 dB
CMRR @ 10 kHz: < -60 dB
Max. output @ 1 % THD+N: > +26 dBu
Gain:
Output: off to +10 dB
Low-, Mid-, & High band: off to +10 dB
Tracking between channels: < 0.5 dB
X-over frequencies x1 x4
Low & Mid band: 60 to 300 Hz, 0.24 to 1.2 kHz
Mid & High band: 1.2 to 6 kHz
Mastering version:
Low & Mid Band: 60, 100, 160/ 0.24, 0.4, 0.54,
200, 300 Hz / 0.8, 1.0, 1.2 Hz
High & Mid Band 1.2,2.0.3.2 / 4.0, 4.8, 6.0 kHz
Compressor
Ratio: 1.5:1 to 10:1
Threshold: off to -20 dBu
Attack: 3 ms to 200 ms
Release: 60 ms to 2 s
Tubes ECC 81 4 pc
ECC 82 2 pc
ECC 83 2 pc
Dimensions
Height: 3 units 132 mm 5.2"
Width: 480 mm 19.0"
Depth: 205 mm 8.1"
Weight
Net: 6.2 kg 13.7 lbs.
Shipping: 7.5 kg 16.5 lbs.
Power requirements @ 115 V/230 V, 50-60 Hz: 30-45 W