tube preamp with 3 x 12AX7, adjustable DI-out with ground lift switch, preamp out and power amp in, driver tubes 1 x 12AX7 and 1 x 12AU7, ultra low und high boost, 450 watts into 4 ohms and 275 watts into 8 ohms, mid-tone-control with 5 positions, effect loop, 3-band EQ and graphic 9-band EQ, dimensions WHD: 48,26 cm (19") x 8,89 cm (2 U) x 39,37 cm