B-Stock, the t.amp D4-500 Digital 4-channel Amplifier - 4x 500W @ 4 Ohms, 4x 250W @ 8 Ohms, XLR inputs, Speakon outputs, very quiet fan. Dimensions: 19"/1U (depth: 23,4cm). Weight: 4.6kg, B-Stock with full warranty, may have traces of use.