Basically self-contained, compact sound systems, the KB series amps are perfect for voice, keyboards, acoustic and electric guitar, drum machines and backing machines. 4 separate channels Channels 1 & 2 have 1/4" inputs Channel 3 features XLR and 1/4" inputs Channel 4 features 1/4" monitor input with level control Channels 1 & 2 have 2 band EQ Channel 3 has 3 band EQ Headphone out 10 inch coax speaker FX send/return Balanced XLR main out Biamped 45 watts and 12 watts Weight Unpacked: 34.00 lb(15.422 kg) Weight Packed: 40.00 lb(18.144 kg) Width Packed: 21.12"(53.6448 cm) Height Packed: 22.12"(56.1848 cm) Depth Packed: 16.62"(42.2148 cm) Warranty period 2 years