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Grace Design m102
High Fidelity Optical Compressor

OUR PART #:  M102

The Grace Design m102 optical compressor is built in a half-rack 1RU module.
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Our Price: $765.00
List Price: $850.00
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Grace Design m102
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The Grace Design m102 optical compressor is built in a half-rack 1RU module. From gentle dynamic smoothing to full tilt squash, this unit delivers open, musical dynamic control that is the perfect companion to Grace Design's high fidelity mic preamplifiers or any recording chain. All your tracks can now have easy to use compression which regardless of how much you squeeze, will always end up with their sonic essence perfectly intact.

The heart of the compressor circuit is an optical attenuator - the purest, high fidelity gain control mechanism available. With careful attention to control circuit design, Grace Design is able to implement a feedback opto compressor that not only provides a wide range of dynamic control, but remains inherently neutral, open and musical.

This full featured unit includes input and output level, threshold, attack, release and ratio controls. The m102 includes balanced inputs and outputs, both with parallel XLR and 1/4" TRS connectors, along with a 1/4" TRS jack for stereo link or sidechain signal input.

Grace Design m102 Features:

  • Elegantly simple, purist feedback design optical compressor, optimized for signal leveling with a minimum of sonic artifacts
  • From subtle dynamic control to heavy compression, the sonic character of the source remains intact
  • Comprehensive control set includes input level, threshhold, attack, release, ratio and makeup gain
  • Bright, easy to read 10-segment LED gain reduction meters
  • Bi-color output peak LED lights green with signal present and red 8dB before clipping
  • dual balanced inputs and outputs on XLR and 1/4" TRS
  • Precision audio path with 0.5% precision metal film resistors
  • Bombproof laser-etched black anodized front panel
  • Built-in universal power supply
  • Made in the USA
  • Comes with Grace Design's transferrable EON Limited 20 Year Warranty!

Grace Design m102 Specifications:


  • Input Trim -10 - +10dB
  • Output Trim -10 - +10dB


  • Threshold Range -15 - +15 dBu
  • Attack Range 3 – 200 ms
  • Release Range 0.03 – 3 s
  • Ratio Range 1:1 – 12:1
  • Gain Reduction 0 – 20dB

THD+N 1kHz, 22Hz-22kHz BW

  • @ 0dB Gain +10dBu out <0.002%


  • @ 0dB Gain +20dBu out
  • SMPTE/DIN 4:1 7kHz/50Hz <0.007%


  • @0dB Gain <-84dB

CMRR @0dB Gain, 3.5Vcm

  • 100Hz >75dB
  • 1kHz >75dB
  • 10kHz >75dB


  • @0dB Gain -3dB 0.016Hz-150kHz


  • Line In 24 kOhm
  • Main Out balanced 350 Ohm
  • Main Out unbalanced 150 Ohm
  • Link In – side chain mode 100 kOhm


  • Output Peak Indicator Green: -15dBu / Red: +20dBu
  • Gain Reduction Meter 0 -10dB Gain Reduction


  • 100k Ohm load, 0.1% THD +26dBu


  • 1.7" H x 8.5" W x 9" D (4.3 x 21.6 x22.8 cm) 
  • 2.4 lbs (1.1 kg)


  • 100-240VAC 5 Watts Max

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