The ART Pro-VLA II is a Vactrol-based leveling compressor/amplifier designed to track, mix, master, live sound or transmission situations. By using an optoelectronic design, (unlike a more typical VCA-driven level detection circuit) the Pro-VLA II allows you to add more compression to an audio source with a more natural musical sound output and a dynamic leveling virtually transparent. This VCA-free design along with a 12AT7 vacuum tube at the winning stage makes the Pro-VLA II an ideal dynamic control device. ART Pro-VLA II leveling compressor/amplifier at a glance: Excellent in the study or live Vactrol Great tube compression circuits in the ART live or studio The leveling tube/amplifier compressor offers analog leveling/compression designed to work smoothly with any recording application, sound reinforcement and electronic instrument. It stands out in making tracks rich and full for both live audio engineering and studio recording applications.