Tube-tech SMC 2B Multiband Opto Compressor User Manual download pdf

Lydkraft ApS

Mose Allé 20, DK2610 Rødovre

Denmark

TUBE-TECH SMC 2B/M

Stereo Multiband Compressor

Description:

The TUBE-TECH multiband compressor SMC 2B/M is three-band stereo compressor.

The two x-over frequencies are each made with a single RC circuit thereby preserving

optimum summation of the three bands at the output.

The x-over frequency between the low band and the mid band is variable from 60Hz to

300Hz or 240Hz to1200Hz and the x-over frequency between mid band and the high band

is variable from 1,2kHz to 6kHz.

The signals from the three bands are then fed to the three separate side chain circuits,

each common for left and right channel. After processing, the three signals goes to a gain

control, separate for each band and, are thereafter summed and send to the output gain,

controlling the entire output level for all three bands.

Compressor:

The compressors are of the optical device type. It has controls for ratio, threshold, attack

and release.

COMPRESSOR CONTROLS:

RATIO: The ratio control varies the ratio by which the input signal is compressed.

If the ratio selected is 2:1, and the input signal increases 10 dB, the output

signal is only increased by 5 dB.

The ratio control is continuously variable from 1,5:1 to 10:1.

THRESHOLD: The threshold is the point where the compressor begins to respond.

It is defined as the point where the gain is reduced by 1 dB.

The threshold is continuously variable from off to -20 dBU.

ATTACK: The attack control chooses how fast/slow the compressor responds to an

increase in the input signal.

The attack control is continuously variable from 3 to 200 milliseconds.

RELEASE: The release control chooses how fast/slow the compressor responds to a

decrease in the input signal.

The release control is continuously variable from 0,06 to 2 seconds.

COMP in/out: This switch controls a relay that bypasses the whole unit.

(131113)

1 2 3 4 5 6 7 8

Lydkraft ApS 2
ADJUSTMENT PROCEDURE: 3

Summary of Contents

Page 1

Lydkraft ApS Mose Allé 20, DK2610 Rødovre Denmark 1 TUBE-TECH SMC 2B/M Stereo Multiband Compressor Description: The TUBE-TECH multiban

Page 2 - Lydkraft ApS

Lydkraft ApS Mose Allé 20, DK2610 Rødovre Denmark 2 OUTPUT GAIN: The gain control is used to "make up" for the gain loss, which

Page 3 - ADJUSTMENT PROCEDURE:

Lydkraft ApS Mose Allé 20, DK2610 Rødovre Denmark 3 ADJUSTMENT PROCEDURE: CAUTION: Before making any adjustment let the unit heat-up a

Page 4

Lydkraft ApS Mose Allé 20, DK2610 Rødovre Denmark 4 6) Apply a signal of 100 Hz, (approx. -20 dBU) to the input and adjust the input level

Page 5

Lydkraft ApS Mose Allé 20, DK2610 Rødovre Denmark 5 HIGH BAND: 1) Turn all the THRESHOLD-controls fully counter-clockwise. 2) Turn th

Page 6

Lydkraft ApS Mose Allé 20, DK2610 Rødovre Denmark 6 5) The difference between channels shall be within 0,5dB 6) Repeat step 2-5 for th

Page 7

Lydkraft ApS Mose Allé 20, DK2610 Rødovre Denmark 7 TECHNICAL SPECIFICATIONS SMC 2B: Input impedance: > 2 kOhm Output impedance: &l

Page 8

Lydkraft ApS Mose Allé 20, DK2610 Rødovre Denmark 8 Dimensions Height: 2 units 132 mm / 5,2” Width: 483 mm / 19” Depth: 205 mm / 8,1

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Tube-tech SMC 2B Multiband Opto Compressor User Manual

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