ART Pro VLA II 2-Channel Compressor

The ART Pro VLA II Two Channel Vactrol-Based Compressor is a tube driven Vactrol®-based Compressor / Leveling amplifier designed to excel in any professional audio environment.

The ART Pro VLA II is an indispensable tool for tracking, mixing, mastering, dynamic control of live sound sources or for use in broadcast audio. The ART Pro VLA II is capable of delivering a far more musical natural sounding and sonically transparent compression than competitive units in its class, the ProVLA II uses an Opto-electronic circuit rather than the more typical design VCA driven level detection circuit.

This VCA-less design coupled with a 12AT7 vacuum tube in the gain stage makes the Pro-VLA II the ideal dynamic control device for critical audio applications. Exceptional signal integrity with extremely low noise and low distortion is achieved in the ProVLA II by utilizing a transformerless design throughout.

The ART Pro VLA II features Vactrol® Technology. Vactrol® design allows the ProVLA II to react to audio signal in much the same way the eye naturally adjusts to fluctuations in light levels – smoothly, quietly and almost imperceptibly. XLR and 1/4-inch TRS balanced inputs and outputs are provided to ensure the ProVLA II can connect with any audio source or hardware. A +4dBu/-10dBu mode switch optimizes ProVLA II I/O for either consumer or professional equipment.

The ART Pro VLA II Two Channel Vactrol-Based Compressor Main Features Include:

• VCA-Less Vactrol Opto-Compression Design
• Mastering Quality Audio Signal Path with Tube Gain Stage
• Enhanced Link Mode – While in stereo link mode, channel 1 level control acts as a master output level and channel 2 becomes a balance control between them, - optimizing the Pro-VLA II for use as a mastering tool
• Variable Threshold, Ratio & Output Controls
• LED Backlit VU Input/Output Level Metering
• LED Metering Indicates Both Average Level And Peak Hold
• Accurate Ten Segment LED Gain Reduction Metering
• +4dBu/-10dBu Mode Switch Optimizes Pro-VLA II For Interface with Professional OR
• Consumer Grade Components
• Active Balanced XLR And ¼-Inch Inputs & Outputs
• Toroidal Transformer Reduces Mechanical & Electrical Hum
• Dimensions: 3.50" H x 19.0" W x 9.17" D (89 mm H x 483 mm W x 487 mm D)
• Weight: 10.5 lbs. (4.8 kg)
• Input impedance balanced/unbalanced: 10K Ohms
  
  Maximum levels:
• Range switch: +4dBu/-10dBV selectable
• Inputs: +20dBu (in +4dBu mode) / +10dBV (in 10dBV mode)
• Output: +20dBu (R load > 10K, 0.1%THD)
• Output Gain: +20dB max
    
• Frequency response: 10Hz to 100KHz (+/- 0.5dB)
• Dynamic Range: >100dB (20-20KHz)
• THD: @ 0dBm Out <0.1% (typical)
  
  Equivalent Input Noise (EIN)
• @+4dBu: -99dBu ('A' weighted)
• @-10 dBV: -107dBu ('A' weighted)
   
• Attack time: 0.25msec. to 50msec. variable
• Release time: 150msec. to 3 sec, variable
• Slope variable: 2:1 to 20:1
• Max. attenuation: 30dB