Ampeg V-4B Bass Head, Electric Bass Head, All-tube amplifier, Power: 100 W, Preamp tubes: 2 x 12AX7, Driver tubes: 1 x 12AX7 and 1 x 12AU7, Power amp tubes: 4 x 6L6GC, Vintage rocker switches, Chassis suspension system, 3-Band EQ: Bass, mids and treble, 3 Mid-range frequencies per rocker switch, Ultra hi/lo boost, Speaker connectors: 1 x 8 Ohm, 2 x 4 Ohm and 2 x 2 Ohm, Balanced direct out with ground lift, Power amp in / preamp out, -15 dB input, Slave output to terminals on additional amplifiers, Dimensions (W x H x D): 610 x 279 x 279 mm, Weight: 18.6 kg, Classic V-4B - Ampeg Black Line design, Matching case: Art.#318733# (not included in delivery)