Avalon Design 2044 Dual Mono-Stereo Compressor The Compressor Used In the World's Finest Recording Facilities! If you need compression but don't want that "compressed" sound, the Avalon AD2044 Dual Mono Compressor is an ideal choice! The AD2044 is dead quiet, absolutely transparent, and delivers full frequency response even during heavy squeezing. That's why you'll find the AD2044 in major recording studios worldwide!