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

Brand New
Free Shipping
As low as $42/month withLearn more
Only 1 left - act fast!
This seller is open to offers

Still Shipping Quickly

This seller is shipping orders within 24 hours, on average.

Buy With Confidence

Reverb Protection has you covered. We provide a safe community for finding the gear you want.

Shipped From
Brooklyn, NY, United States
Joined Reverb
Preferred Seller
Quick Responder
Quick Shipper

Find More on Reverb

About This Listing


The Warm Audio WA-2A is a single-channel tube optical compressor that recreates a classic leveling amplifier originally released in the late 1950s. With Tung-Sol and Electro-Harmonix tubes, dual CineMag transformers, and a Kenetek opto-cell, the WA-2A offers smooth, warm compression ideal for vocals, bass, guitars, drums, and parallel submixes. Its discrete signal path is terminated with balanced XLR and 1/4" TRS input and output connectors, and delivers a high output with minimal noise.

Use compress mode for moderate peak attenuation, or switch to limit mode for more aggressive gain reduction. Operation is simple and efficient, thanks to the adjustable gain and peak reduction controls. The rear-panel "Pre-Emphasis" serves as a tone control for the sidechain. A large VU meter allows easy viewing of gain reduction or output level, and can be calibrated via a dedicated potentiometer. The WA-2A supports stereo linking to a second WA-2A through a 1/4" TRS cable (available separately).

  • Transformed-balanced, high-voltage, optical tube compressor built in the classic "2A" style
  • Up to 40 dB of gain reduction
  • Up to 40 dB of make-up gain
  • CineMag USA input and output transformers
  • USA-made Kenetek opto-cell attenuator T4-style module
  • Socketed construction to allow retrofitting of other opto-cells and tubes
  • Tung-Sol and Electro-Harmonix tubes including two 12AX7s, one 12BH7, and one 6P1
  • Fully discrete signal path
  • Variable pre-emphasis allows for reducing high frequencies in the sidechain
  • Supports stereo linking via 1/4" TRS
  • Balanced XLR and 1/4" TRS I/O
  • VU meter with selectable display of gain reduction or output at +4 dB / +10 dB above the meter reading
  • Rear-panel meter adjust function for easy VU calibration
  • Occupies 2 RU of rack space

Whats in The Box
  • Warm Audio WA-2A Single-Channel Tube Optical Compressor
  • IEC Power Cable
  • Limited 1-Year Warranty


Compressor/Limiter (Leveling Amplifier)

Number of Channels

1 x XLR 3-Pin Female (Balanced)
1 x 1/4" TRS Female (Balanced)

1 x XLR 3-Pin Male (Balanced)
1 x 1/4" TRS Female (Balanced)

Link Connector
1 x 1/4" TRS Female

Input Impedance
600 Ohms

Output Impedance
600 Ohms

Maximum Input Level
+16 dB

Compression Threshold

Compression Ratio
Compress Mode: Fixed and Source-Dependent
Limit Mode: Approximately Infinity:1

Attack Time
10 ms

Release Time
50% Release: 60 ms
Complete Release: 500 ms to 5 sec

Maximum Output Level
+16 dB (+10 dB Nomimal)

Make-up Gain
Up to 40 dB (± 1 dB)

Gain Reduction
Up to -40 dB (± 3 dB)

Frequency Response
15 Hz to 20 kHz (± 1 dB)

Distortion (THD)
< 0.1% at ± 10 dBm

-74 dB
250 V, 1 A Fast-Blow Fuse

Power Requirement
115/230 VAC, 50/60 Hz

Dimensions (W x H x D)
19.0 x 3.5 x 7.0" / 48.3 x 8.9 x 17.8 cm

12 lb / 5.4 kg


Product Specs

ConditionBrand New (New)
Brand New items are sold by an authorized dealer or original builder and include all original packaging.learn more

Seller Reviews