ART Pro VLA III - Two Channel Vactrol-based Compressor

The ART Pro VLA II is a two channel, vactrol based compressor that has become a genuine studio staple, loved for its smooth, musical control of dynamics and unmistakable analogue character. Equally at home on vocals, bass, guitars, synths or across a stereo mix bus, it delivers that sought after glue and warmth without ever sounding harsh or clinical.

Using an optical gain reduction circuit and a real 12AT7 valve stage, the Pro VLA II offers a highly musical response that flatters almost any source. Each channel can be used independently or linked for true stereo operation, making it a flexible tool for both tracking and mixing. With comprehensive metering and a wide range of controls, it is easy to dial in anything from subtle levelling to more obvious, characterful compression.

Engineers value the Pro VLA II for its ability to tame peaks in a natural, almost invisible way, while still adding a touch of analogue richness. The fixed input, variable threshold topology keeps operation intuitive, so you can focus on the sound rather than wrestling with complex gain staging. Whether you are upgrading from plug in compression or expanding an existing outboard rack, this unit offers a huge amount of sonic quality for the money.

On the back panel you will find balanced XLR and 1/4" connections along with a switchable operating level, so it can integrate cleanly with a wide range of studio setups. With all analogue circuitry and that classic opto response, the Pro VLA II is a reliable workhorse that can quietly become your go to compressor on session after session.

Musical Optical Compression

The Pro VLA II uses a vactrol based optical circuit for gain reduction, giving it a naturally smooth, programme dependent response. Transients are controlled without sounding grabby, making it ideal for vocals, acoustic instruments and mix bus duties where you want control and cohesion rather than obvious pumping.

Dual Mono or Stereo Linked Operation

With two fully featured channels that can run independently or be linked, the Pro VLA II covers a lot of ground. Use it as a pair of mono compressors while tracking, then switch to stereo link mode to glue your mix or drum bus together with consistent, symmetrical compression.

Comprehensive Controls and Metering

Variable threshold, ratio, attack, release and output level controls on each channel give you precise command over how the compressor behaves. Simultaneous metering of input level, output level and gain reduction keeps you fully informed at a glance, making it quick to set up and easy to recall settings.

Analogue Valve Tone

A genuine 12AT7 valve in the signal path imparts subtle warmth and harmonic richness that plug ins struggle to replicate. It adds depth and weight to sources without sacrificing clarity, helping your tracks sit more confidently in the mix.

• Two Channel Vactrol Based Optical Compressor - Dual channels can be used as separate mono compressors or linked for stereo work, giving you flexible dynamics control for tracking, mixing and bus processing in a single 2U unit.
• 12AT7 Valve Stage - The inclusion of a real 12AT7 valve adds classic analogue warmth and gentle harmonic colour, helping vocals, instruments and full mixes sound fuller and more engaging.
• Full Control with Clear Metering - Independent threshold, ratio, attack, release and output controls per channel, combined with input, output and gain reduction metering, make it simple to dial in precise compression and maintain healthy levels throughout your signal chain.
• Balanced Connectivity and Switchable Levels - Balanced XLR and 1/4" inputs and outputs plus selectable +4 dBu or -10 dBV operation ensure easy integration with audio interfaces, mixers and other outboard, whether you are in a project studio or a more complex setup.

General

• Product: ART Pro VLA II
• Type: Two channel vactrol based optical compressor
• Valve: 12AT7
• Operation Modes: Dual mono or linked stereo

Controls and Functions

• Per Channel Controls: Threshold, Ratio, Attack, Release, Output Level
• Per Channel Functions: Bypass
• Metering: Input level, Output level, Gain reduction

Inputs and Outputs

• Inputs: Balanced XLR, 1/4" jack
• Outputs: Balanced XLR, 1/4" jack
• Operating Level: Selectable +4 dBu or -10 dBV

Power

• Power Requirements: 100 to 240 V AC, 50 Hz / 60 Hz
• Power Consumption: 25 W
• Connector: Rear mounted IEC

Physical

• Dimensions (D x W x H): 23.4 cm x 48.3 cm x 8.9 cm
• Weight: 4.76 kg