Warm Audio WA-2A Tube Optical Compressor
Warm Audio WA-2A Tube Optical Compressor
Warm Audio WA-2A Tube Optical Compressor
Warm Audio WA-2A Tube Optical Compressor

Warm Audio WA-2A Tube Optical Compressor

Regular price $949.00
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1-channel Tube Optical Compressor with All-discrete Signal Path, Custom Optical Photocell, and Cinemag Transformers. 

No plug-in or other compressor type quite compares to the warm, forgiving, fluid qualities of the classic '2A optical compressor. For decades, the renowned ‘2A style circuit has become the go-to device for seamlessly handling vocals, bass, and a wide variety of other instruments and program material in an effortlessly smooth way.

Releasing the WA-2A would be for nothing if we couldn’t make it affordable.
The WA-2A is a high-voltage, Class-A opto-compressor, utilizing large-core CineMag USA Transformers, four premium vacuum tubes, and the legendary Kenetek opto-cell - considered by many to be the world’s finest.

A Four Tube Operation
The WA-2A operates on four tubes: two 12AX7’s, one 12BH7, and one 6aq5 (or 6P1J).



  • '2a style, transformer balanced, high voltage, opto tube compressor​.
  • Utilizes premium grade input and output cinemag usa transformers.
  • Usa made kenetek opto-cell attenuator t4' style module. Socketed to allow retro-fitting with other opto-cells.
  • Premium tubes. 2x 12ax7, 1x 12bh7, 1x 6aq5 or 6p1.
  • Fully discrete signal path.
  • Variable pre-emphasis, allows for compression hipass filtering (tone control).
  • Stereo-link capable via trs connector.
  • Input impedance - 600 ohms, bridges-t control (floating).
  • Xlr and trs balanced line level outputs - 600 ohms impedance.
  • Xlr and trs balanced line level inputs - 600 ohms impedance.
  • Frequency response +/- 1 db, 15 hz to 20khz.
  • Gain 40 db ±1db.
  • Input level +16 db maximum.
  • Output level +10 db nominal, +16 db maximum.
  • Distortion less than 0.1% thd at ±10 dbm.
  • Noise = -74db.
  • Attack time - 10 milliseconds.
  • Release time - 0.06 seconds for 50% release - 0.5 to 5 seconds for complete release.
  • Meter displays both db gain reduction and db output.
  • Power - 115/230 volts (switchable), 50/60 hz.
  • Dimensions - 19" rackmount chassis, 2u. 19" x 7" x 3.5".