This is a dbx 166XL compressor. It hasn't been used much, so it's in beautiful condition. There are no noticeable scratches or major damage. - Power on confirmed - Sound output confirmed on each channel - COMP / LIMITER / GATE operation confirmed - LINK operation OK The sound is thick and characteristic of dbx, making it very easy to use on kick drums, bass, synths, and drum buses. Ready to use for live performances, DJing, and home recording. Thank you.