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Selected SMC2B Users

Tube-Tech SMC2B Reviews and Articles


SMC2B Test  ( In German )



User Review  



+ Sonic quality

+ Individual bands are fully


+ Good metering


- None

The Score:

This unit is a winner on all fronts:

tracking, mixing and mastering.


Read the full Review




Stevie Wonder introduces TUBE-TECH SMC2B and CL1B to Southwestern Collage, US

SMC 2B Downloads

The SMC2B Joke


Qoute  Garrick Lewis,

Live sound mixer, LA:


"The in/out button

is the SUCK Button"


Why, you ask!


"It sucks when

it''s OUT!"


(Garrick uses his SMC2B

Inserted on the mixbus of

his FOH mixer)

SMC2B links

SMC 2B Multiband Opto Compressor

SMC 2B(M) Description

The TUBE-TECH SMC 2B Stereo Multiband Compressor features three independent optical stereo compressors.
Combining the effect of wide 3 band level control with individual compression of the three bands creates pure magic, especially on the main mix bus, but also on submixes like drum buss, instrument groups and single tracks.

The SMC2B is one of the few audio processors, that is very hard to bypass, even after a short listening test, and it will tend to stay inserted forever because of the color and dynamics it can add to your source material.

Try it for mixing, and hear the magic no other compressor can deliver!

For Live use the SMC2B is adding quality and musicality to top touring acts. 


As an extra bonus feature, SMC2B can also be used to solve / remove annoying frequencies in basses, vocals, etc.

It can even be set up as a d-esser.

SMC2B can be very effective when recording very dynamic vocalists without having to spend hours sorting out problems after the recording has been done.


The SMC 2B is one of the most creative and musical audio tools available, and an all-time favorite for countless sound engineers around the world.

SMC2B(M) Video's

SMC 2B, controls and features:











SMC2B Mix bus processing, audio demo:                                                                         


The demo mix is was made during the mixing session for the

2013 release from Danish Organ player, Kjeld Lauritzen Trio: " In the Zone" 

Mixed by Jesper Bo Nielsen.







SMC2B Sound Samples

Listen to the difference the TUBE-TECH SMC2B Multiband compressor can do for your mix

The flash player is featuring tracks from two great Danish artists:

Jens Lysdal and Søren Høg, HAWK


Jens Lysdal website

Hawk website



Tracks : Examples :
Master Lysdal A
Master Lysdal B
Master B Hawk


SMC2b(M) User Videos

SMC as Drumcompressor. From Amp Mastering

SMC2B - User statements


Al Schmitt,  Engineer, mixer, Producer. Multi Grammy Winner. Los Angeles USA

(Dianna Crall, Paul McCartney,Natalie Cole, Shelby Lynne, Ray Charles, Chris Botti, Babara Streisand, Steely Dan,Toto.) 


" I love my Tube Tech SMC2B and use it all the time!  Main use is for the mix bus compression."


Read more about Al Scmitt and SMC2B 



RALVIEH MASTERBLASTER, Frankfurt, Hessen Germany. Analogue/Digital Mastering.

"I am Really Happy with it !!!!!!! It gives BALLS to every Mix.

Working light, it''s warming of the sound up and bringing the musicians acting together in the Mix.
Harder driven,there''s a real PUSH

....with Straight LO´s ,warm driving mids,and sparkling,clear,never annoying highs !!!!
vocals benefit from the warm,but never muddy mid´s.
The limiters after the SMC 2B has less stress, EQ`ing is easier than before ,

the complete analog chain works better.
Apart from of a technical limiter there is no more need for plugins.
Other plugins only used for repairs,effects ......since I have the TUBE-TECH SMC2B.
The Workflow is so much better & faster than before !!!!

A lot of knobs,but very easy to use.
So I like to say THANK YOU for this Very Cool Tool !!!!



Joe Chiccarelli  Producer/ mix Engineer, Los Angeles US.  Multi Grammy Winner.

".......I use the Tubetech SMC2B on the mix buss on many occasions. I''ve used it on tracks for Rufus Wainright, Beck ,The All American Rejects, The Offspring. I love being able to have separate compression control over three bands. Often many stereo buss compressors will squish and darken the midrange of a track. In a rock track this takes the attack and impact out of the guitars and drums . Having the separate control over all parameters I can set my attack time to be the mildest on the electric guitar range. Being able to control the frequency range in the low end works well on tracks that are very dance oriented. I can adjust the crossover point and make sure the low end never gets to overcompressed and soft...... "



Julio Reyes Copello Producer and Composer, Miami US.  Grammy Winner.

Statement about SMC2B + SSA2B Summing Amp:


"Guys, thank you very much!....I just want to say that it''s been the

best investment I''ve done in the last years. These two guys are The
missing piece!. adiós to millions of frustrations.. the art of pure
and happy sound it''s there!! wow!"



Read more about Julio Copellos experience with TUBE-TECH





Lionel Habert, Mastering Prod, France

(Vangelis,Jean Philippe Rykiel, Vivian Roost, Dan Mc Conomy, NRJ12, Radio France.)


"The SMC2B was just amazing when I released the mastering of Vangelis."






 Legacy Studio, The Netherlands

"The SMC2B is an absolute favourite for mastering."


John Webber, Blue Pro Mastering, London, UK


"I often use The SMC2B purely for it's signal path and the tube and transformer combo seems to recue cold and brittle digital recordings. It's also my go-to tool for tightening flabby bottom end."











TUBE-TECH SMC2B for Live Sound

SMC 2B 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

SMC 2B Technical Description

Variable crossover points ensure precise control with all three bands

of opto-compression. 

Independent band specific Threshold, Ratio, Attack, Release & Gain parameters 

make the SMC 2B as flexible as it is accurate.


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.


What's the difference between SMC2B and SMC2A?


The only difference is that the SMC2B has an output balance control for fine tuning small balance differences between channels.


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