Mic Pre/ Multiband Compressor

The MMC 1A is our latest recording channel - encompassing a complete front-end it includes an additional Direct Instrument input as well as a separate line input. The microphone input has switchable loading impedance, phantom power, phase reversal and a -20 dB Pad. All inputs are equipped with a low-cut filter.
The 3-band optical compressor is designed to maintain optimum summing of all three bands with a remarkably flat frequency response. A bypass switch shorts out the whole compressor.

Mic. Input/Output are balanced and have fully floating transformers with a static screen. The Line Input is unbalanced, but an optional transformer is available.
The power supply and the sidechain circuits are based on a solid state circuit. With the exception of the output stage all DC voltages are stabilised.

Product Features

• Mic. Gain in 2 dB and 10 dB steps
• Selectable mic. impedance 600/1200/2400
• Phantom Power (+48V)
• Phase reversal
• 20 dB pad
• High impedance Direct Input
• Separate line input (gain +/- 10 dB)
• Lowcut filter (20 Hz / 40 Hz/off)
• Optical gain reduction elements
• Cont. variable Threshold, Attack, Release
• Ratio 2:1 to 10:1
• LED display showing gain reduction
• Low, Mid, High Output Gain: off to +10 dB
• Variable X-over frequencies
• Low noise < -80 dBu @ 0 dB gain
• Master Output Gain: off to +10 dB

Online Manual
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Specifications

• Impedance
  Mic. Input: 600/1200/2400 ohm
  Input, DI: < 1 Mohm
  Line input: 20 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 %
  Max. output: : +26 dBu < 1 %
  Max input: +21 dBu < 1 %
• Noise Mic. Rg=200 ohm
  Gain:                            +20 dB                     +60 dB
  22Hz-22kHz:            < -80 dBu                < -60 dBu
  CCIR-468-4:            < -70 dBu                < -50 dBu
• Noise Line Rg=200 ohm
  Gain:                               0 dB                        +10 dB
  22Hz-22kHz:            < -80 dBu                  < -75 dBu
  CCIR-468-4:            < -70 dBu                  < -65 dBu
• Noise DI Rg=1 Mohm
  Gain:                               0 dB                        +50 dB
  22Hz-22kHz:           < -80 dBu                   < -50 dBu
  CCIR-468-4:           < -70 dBu                   < -40 dBu
• CMRR @ 10 kHz: < -60 dB
• Gain:
  Mic: +10 dB to +70 dB
  Line: -10 dB to +10 dB
  DI: 0 dB to +60 dB
  Low, Mid & High band: off to +10 dB
  Output: off to +10 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
• Compressor
  Ratio: 2:1 or 10:1
  Threshold: off to 20 dBu
  Attack: 3 ms to 200 ms
  Release: 60 ms to 2 s
• Tubes
  ECC 81 4 pcs.
  ECC 82 1 pcs.
  ECC 83 1 pcs.
• Dimensions
  Height: 2 units 88 mm 3.5"
  Width: 483 mm 19.0"
  Depth: 205 mm 8.1"
• Weight
  Net: 5.3 kg 9.5 lbs.
  Shipping: 6.1 kg 13.4 lbs.
• Power requirements
  @ 115 V/230 V, 50-60 Hz: 30-45 W
• Notes
  All specifications @ RL=600 ohm
  Lydkraft reserves the right to alter specifications without prior notice