Buy a WA-2A, get 4 Prem-XLR-20 Cables at participating retailers through March 31
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WA-2A Tube Optical Compressor

Authentic reproduction of the most revered compressor and leveling amplifier in recording history
MSRP $949

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Analog Tone

Though digital technology and software have made great strides in recent years; we still believe that nothing compares to the level of articulation, depth, realism, and responsiveness of a well-built piece of analog gear. When you hear the bottom-end presence and top-end detail of quality analog gear, the difference is astounding. The cost of most boutique analog equipment is financially out of reach for many recording artists. Our mission is to change this, and introduce as many people as we can to recording and mixing with real, dedicated hardware.

'2A Style Optical Compressor

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. Since the start of Warm Audio we have striven to give an unprecedented value to our customers, by putting high end audio within the reach of more people than ever before. This philosophy drives everything we do, and every product we offer.

Premium Components

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). We proudly use premium brand tubes in the signal path, which sound very 'open' and LARGE. All 4 tubes are socketed for easy swapping and replacement.


Technical Specifications

  • '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".

Sound Samples


In this example, a microphone is feeding into a preampflier, which feeds in to the WA-2A via a balanced XLR patch cable, which feeds in the LINE LEVEL input of your recording interface/recorder. Note: it is important to use a line level input on your recording device as opposed to a microphone or instrument level input.

In this example, the WA-2A is being routed as an insert into a recording device. This is useful for using the WA-2A as an “analog plug-in” or insert for mix-down. The recording device is feeding the WA-2A with a balanced 1/4” cable via a line output. Then, the recording device is capturing the WA-2A via a LINE LEVEL input.

Note: It is important to use a line level input on your recording device as opposed to a microphone or instrument level input.

Magazine Reviews


Nominations & Awards


“Warm Audio makes amazing gear! I love the WA-2A and their new WA-87 mic. I have started running my mixes through a pair of their EQP-WA's!”

Michael Lord - (American Idol, Anthrax, Hollywood Today Live, The Fringe, Steel Panther, The Wall)

"I was looking for that warm and fuzzy feeling of real and authentic analogue sound without having to deal with old equipment and the commitment of constant maintenance and repairs. Warm Audio is exactly that. Brand new authentic, amazing sounding analog gear. WA76 and WA2A…WOW! Couldn’t be happier.”

E-MAN Cervantes - (Andy Grammer, Gwen Stefani, Cody Simpson, Lukas Nelson)

"When I first dialed in the new gear I received from Warm Audio, I was blown away. You just can't help but notice how big and full everything sounds in the room.”

Ryan Bingham - Singer/Songwriter, Musician & Producer