Retro Doublewide Compressor This is a mono tube compressor in the API 500 series format. This is a valuable, discontinued first-generation model. It hasn't been used much and I think it's in relatively good condition, but please check the photos for details such as minor scratches. The unit will be shipped in the outer box of a different model (Bluey500). Please consider it. Thank you very much. retro api comp comp13 discontinued onboard audio DTM DAW