1ohm stable; Ultra-Fi(TM) MOSFET amp is designed for music reproduction; 0deg -180deg phase adjustment; Nickel-plated RCA jacks resist corrosion; Internal variable crossover network allows for audiophile control of EQ circuits; Aluminum heat sink minimizes heat buildup; Simpatico coil design keeps voltage constant through the Ultra-Fi(TM) output devices; Molded & angled connection types; LED indicators show system protection circuitry diagnostics; Preamp RCA outputs for daisy-chaining multiple amps eliminate additional signal cables from the source unit; 10-gauge speaker terminal wire; Freq resp: 10Hz-50kHz; 0dB-10dB bass boost; Illuminated Hifonics(R) logo; 2,500W; 625W x 1 @ 4ohm ; 1,250W x 1 @ 2ohm ; Includes bass remote & manual;