Gallien Krueger Fusion 550 Bass Head Hybrid - 500W/4ohm, 3 HE, 350W/8ohm plus 50W horn bi-amp system, 3x 12AX7 preamp tubes, motorized knobs (foot switchable), gain, master and horn level controls, 4-band active EQ, variable contour with 500Hz-800Hz mid frequency select, deep and bright switch, mute switch (foot switchable), active/passive switch, effects loop, tuner out, active DI. dimensions: 49 x 13,50 x 25cm, weight: 11.5kg, incl. 2-button footswitch