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Dramastic Audio
Obsidian 500 Stereo Compressor

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Item: N13-1772

Availability: In stock

Obsidian 500 Stereo Compressor


The Obsidian 500 Series Compressor’s circuit design is the same as the 19” big brother, but with some added flexibility. A selectable High Pass Filter and additional ratio for you to use, 1.5:1. Expand it with the Dual Mono Expansion for even greater functionality!

The Obisidian 500 is an API 500 Series Stereo VCA feed forward compressor featuring Jensen transformered input and output.

Through the use of several proprietary methods the OBSIDIAN performs a range of tasks unheard of from the average SSL or SSL-esque unit. The first difference the user will notice is that the audio sound field suffers no "shrinkage". The highs stay brilliant and clear and the bottom will continue to thunder - especially with the internal High Pass Filter engaged on the unit’s detection circuit.

The second thing the user will notice is that the audio has a smooth, rich texture without any pumping or breathing when the "Auto" release time is employed.
From there, if the user decides that the audio is a little too smooth for their application, a simple click of the release switch to it's "Lo-Fi" setting will provide all the "in your face" aggression desired.

The clarity and performance of this unit is unparalleled by any unit based around a Voltage Controlled Amplifier (VCA) gain reduction cell. At first look it may suggest something from the past, but at first listen the user will understand the future of professional audio.

Transformer balanced inputs and outputs lend to the Obsidian's unique sound. The TXIO Enhanced option produces that "phat" classic analog sound making the OBSIDIAN an excellent way to add warmth and character to digital audio workstations.

Use it on the mix bus in the studio or live. Use it on... everything!


  • TXIO Enhanced Transformer Balanced I/O
  • Precision Stepped Controls To Accurately Recall Settings
  • VCA Feed-Forward Compression
  • Selectable Internal High Pass Filter
  • Expansion Port For Additional Features
  • Link Multiple Modules Together
  • Selectable Pad Settings
  • Superior Imaging
  • Ratio settings: 2:1, 4:1, 8:1, 10:1, 12:1 and SKULL !
  • Attack control range: 0.1, 0.3, 0.6, 10 and 30mSec
  • Release control range: 0.1, 0.3, 0., 1.2 sec, AUTO and Lo-Fi
  • Makeup Gain Output 12 db

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  • Analog Input: Impedance: 10k ohms (transformer balanced)
  • Analog Output: Impedance: 600 ohms (transformer balanced)
  • Max Output: +24dbu (above 0dbu with 1% THD ); +23.7dbu (onset of clipping)
  • Noise: < -86dbu in bypass; < -80dbu with compressor IN
  • THD: .005% @ 1kHz
  • IMD: In Bypass: .054%; With compressor IN and no compression: .069%
  • Freq. Response: 10Hz to 50kHz; @ 10Hz – 0.04db; @ 20kHz – 0.36db
  • Crosstalk: Measured referenced to +20dbu; -109db @ 1kHz; -73db @ 20kHz
  • HPF: 12db/octave with selectable cutoffs @ 30Hz, 60Hz, 105Hz, 125Hz, 185Hz, 330Hz

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