Blackstar S1104EL34 Blackstar Series One, EL34 Head, 100W 100 Watt, all-tube, high gain head with Master Volume, Resonance and Presence controls Tube Complement: 3 x ECC83 (12AX7), 1 x ECC82 (12AU7); 4 x EL34 Power Tubes 4 Channels, 6 Modes: Clean (Bright, Warm); Overdrive (Crunch, Super Crunch); OD1; OD2; 3-Band EQ x2 Exclusive ISF and DPR controls; Emulated Speaker Output; Series Effects Loop with Level switch FS-3 foot controller for changing modes; also responds to MIDI switching