Warm Audio WA76-A – Single-Channel Vintage-Voiced Discrete FET Compressor (Blue Stripe)

OVERVIEW

The WA76-A faithfully recreates the sound, response, and harmonic character of the highly sought-after vintage “Blue Stripe” FET compressors that helped shape countless legendary recordings. Known for their explosive attack, energetic compression behaviour, and rich analog saturation, original Blue Stripe compressors became favourites for vocals, drums, guitars, bass, and aggressive mix processing. The WA76-A captures that same unmistakable tone and responsiveness while introducing modern recording features designed for contemporary studio workflows.

Built around premium CineMag USA transformers wound to original vintage specifications, the WA76-A delivers authentic Blue Stripe-style compression with added harmonic richness and analog colour. The fully discrete Class-A signal path is paired with premium poly film capacitors, carefully selected resistors, and a vintage-voiced preamp stage to recreate the gritty yet musical personality engineers expect from classic 76-style compressors. A dedicated dry/wet mix control allows for instant parallel compression, while the variable sidechain high-pass filter helps preserve punch and clarity during heavier compression settings.

Designed for maximum flexibility, the WA76-A also operates as a stereo-linked compressor. Selectable input impedance improves compatibility with both vintage analog equipment and modern audio interfaces, while Active Bypass allows the compressor to impart its analog colour even when compression is bypassed. Hand-tested in Austin, Texas and built using premium components throughout, the WA76-A delivers classic Blue Stripe compression with modern reliability and expanded creative control.

KEY HIGHLIGHTS

Timeless Compression with a Vintage Voice

The WA76-A faithfully recreates one of the fastest and most powerful studio compressors of all time, known for ultra-responsive dynamic control with true analog grit, now with additional modern recording features. Known for use on vocals, drums, guitar, bass, and anything in the studio requiring tight dynamics, the vintage “Blue Stripe” 76 compressors are known for their versatility, speed, and harmonic analog tonality added to recordings. Just like the originals, the WA76-A deliver that classic performance that can be heard on legendary recordings by artists like Led Zeppelin, The Beatles, Chris Stapleton, Chris Lord-Alge and many more.

True-to-Spec, Plus Bonus Modern Add-Ons

Using premium and custom components like a built-to-vintage-spec O-12 (input) and 5002 (output) transformer from CineMag, WA76-A achieves authentic “Blue Stripe” compression, known for fast compression while adding more harmonic distortion for unmistakable analog character. Easily the most feature-rich 76-style compressor on the market, WA76-A has added a dry/wet knob for parallel compression, two versions of active bypass for imparting analog colour, and selectable input impedance to work with modern recording interface outputs. The single-channel WA76-A has additional sidechain flexibility allowing either key inputs to be inserted or EQs for de-essing, as well as stereo linking.

Applications

Vocals — Vintage-Voiced Vocals:

Control any vocal with the fastest analog compression that won’t squash your tone and vibe.

Drums — Instant Rock ‘N’ Roll Drums:

Smash drum busses and room mics. Instantly blend in parallel compression for the ultimate rock and punchy drum sound.

Guitars — Guitar Control with Grit:

Grab hold of dynamically diverse guitar parts and get both electrics and acoustics to sit just right in a dense mix with added analog colour.

Mixing — Add Analog Vibe to Any Mix:

Apply vintage-voiced dynamic control without compromising analog tone.

FEATURES

Summary

Building off of the lauded fame of vintage Blue Stripe compressors, the WA76-A/A2 includes all the controls of the original plus critical added features that deliver a complete and professional recording experience.

Use the mix knob to easily achieve analog parallel compression by dialling the dry signal alongside the compressed (wet) tone. The SC HPF knob engages a variable sidechain high-pass filter with a range of 30-300Hz.

Quickly switch between a traditional 600Ω impedance ideal for other analog gear to a 10kΩ impedance that better-matches modern audio interface outputs.

The WA76-A is a single-channel unit and has two stereo linking jacks to link up to 10 WA76-A compressors for surround/immersive compression. External sidechain inputs and outputs are added to insert key inputs to achieve “ducking” or adding an EQ on the input and output for analog de-essing in real time.

• Single-channel FET compressor inspired by legendary vintage “Blue Stripe” studio compressors
• Delivers ultra-fast attack times with aggressive, character-rich analog compression
• Designed for vocals, drums, guitars, bass, room microphones, and stereo mix processing
• Faithful recreation of classic Blue Stripe-style compression with modern workflow enhancements
• Premium CineMag USA input and output transformers built to original vintage specifications
• Fully discrete Class-A analog signal path
• Vintage-voiced preamp stage adds harmonic saturation and analog grit
• Dedicated dry/wet mix control for easy parallel compression
• Variable sidechain high-pass filter helps maintain low-end punch and clarity
• Switchable input impedance improves compatibility with modern interfaces and analog gear
• Stereo-linked mode for cohesive stereo bus compression
• Active bypass mode allows the unit to function as a line amplifier for added analog colour
• True bypass mode for accurate A/B signal comparisons
• “All-buttons-in” mode for explosive limiting effects and experimental compression tones
• Premium poly film capacitors and carefully selected resistors throughout the circuit
• Vintage-spec attack and release behaviour for authentic 76-style performance
• Balanced XLR and TRS inputs and outputs
• Rackmount-ready 2U chassis design
• Hand-tested and inspected in Austin, Texas
• Five-year manufacturer warranty

TECHNICAL SPECS

Product & External Specs

Type: Single-Channel 100% Analog Discrete FET Compressor – Faithful Recreation of the Vintage “Blue Stripe” FET Compressor with Added Recording Features

VU Meter Options:

• Gain Reduction
• +8dB Output
• +4dB Output
• “Off” Powers off unit

Power Supply: 100-230V Universal IEC Inlet

Input Impedance: Selectable 10 kΩ – to better match modern audio interface specifications

Compressor Control: 100% Dry-Wet Mix

Variable Sidechain High Pass Filter:

• 30 – 300 Hz
• 12 dB / Octave

Stereo Link: ¼-inch connections

External Sidechain Access: 1 × ¼-inch TRS connection

Bypass:

• Active Bypass for Running the Unit as a Line Amplifier
• True Bypass Option for A/B Comparisons

Additional Settings: “All-Buttons-In” for experimental & Hard-Limiter tones

Connectivity: Balanced XLR & TRS Inputs & Outputs

Chassis Size:

• Height: 2U 19″ Rackmount
• Depth: 16.25 cm (6.5”)

Warranty: 5-year warranty

Components & Internal Specs

Amplifier: Class-A Line-Level Output Amplifier

Circuitry: 100% Discrete Audio Signal Path using 600 Ω Input Impedance Attenuator

Transformers: Premium O-12 Input & 5002 Output Transformers from CineMag USA

Performance Specs (Per Channel)

Vintage-Spec Attack & Release:

• Attack = 20 µS – 800
• Release: 50 mS – 1.1 Second

Frequency Response:

• ± 1 dB
• 20 Hz – 20 kHz

Total Amplifier Gain: 58 dB

Signal-To-Noise Ratio (SNR): 86 dB (A-Weighted)

Total Harmonic Distortion Ratio (THD+N): -62 dB (at -13 dBu)

DOWNLOADS & SUPPORT

• User Manual
• Product Registration