API stereo buss compressor. This is the API 2500 – an incredibly useful tool for the professional audio recorder. Only one owner – Richard Lloyd of Television, the rock band. It's in excellent shape treated lovingly and has been in the same rack space since I bought it. I will ship it at my own cost posthaste within the United States. No foreign buyers please. Payment through PayPal API 2500 at $2500 is a steal. Enjoy it. It has no flaws and gives you that famous API sound.