The 160XT is probably the best-known of the classic dbx 160 compressors. The original 160 was a half-width 2U box and the 160X was the first of the familiar 1U dbx rack compressors. The 160XT is similar to the 160X but adds XLR connectors and some updates to the circuitry The 160XT is deceptively simple with just three controls: threshold, compression ratio and output gain. Threshold and output level are self-explanatory. Compression ratio is infinitely variable from 1:1 through 4:1, 8:1 al…