AMPEG SVT2 PRO Ampeg SVT 2 Pro, Testata per basso completamente valvolare, 4 unità rack, RMS Power Output (4 Ohms): 300-Watts RMS Power Output (2 Ohms): 300-Watts Preamp: Tubes (4 x 12AX7, 1 x 12AU7) Driver Tubes: 1 x 12AX7, 2 x 12AU7 Power Amp: Tubes (6 x 6550) Tone Controls: 3-Band Mid Tone Control: 5-Position Graphic EQ: Yes, 9-Band Ultra Low/High Boosts: Yes Balanced Line Out: Yes, Pre/Post (transformer) Effects Loop: Yes Preamp Out/Power Amp In: Yes