dbx 286s Microphone Preamp & Channel Strip Processor Studio quality Mic Preamp/Channel Strip Processor Classic dbx Compression puts great sound within easy reach Frequency tunable De-Esser reduces sibilance and high frequency distortion Enhancer increases the detail and definition of the high and low frequencies Program adaptive Expander/Gate. Frequency response: 20Hz to 20kHz Input: 1/4" TRS (x2) and XLR (x1); Output: 1/4" TRS (x1) Operating voltage: 120VAC 60Hz, 100VAC 50/60Hz Purchase includes: dbx286s, power cord, operation manual, and rack mount screws and washers (x4)