Switchable — 40W or 20W Channels: Normal, OverdriveBuilt-in Effects Loop.Outputs: 1/4’’ Extension Speaker (8 Ω) 1/4’’ Effect Loop Send 1/4’’ Line OutputPreamp Valves: 2 x ECC83 (12AX7), 1 x ECC82 (12AU7)Output Valves: 4 x EL84Speaker: 2 x 12’’ Hiwatt Fane OctapulseSpeaker Impedance: 16 ΩBuilt-in True-Spring Reverb.Compatible with the Hiwatt FS201 Footswitch (Not Included)