Features Power: 30W2x2 inputsControls: Presence, bass, middle, treble, vol 1, vol 2, speed, intensityEffects: TremoloTubes: 3 x ECC83 (pre-amp); 1 x ECC83, 2 x KT66 (power amp)Footswitch included Description Product Description The all-valve 2245THW 30W head is a hand-soldered reissue of the extremely rare "Bluesbreaker" head, based on the archetypal JTM45 head, which was the amp that began it all, back in 1962. As you would expect, the amp specifications for the 2245THW are identical to the 1962HW "Bluesbreaker" combo, minus the speakers of course. Inside the 2245THW, the circuit topology is made up of four ECC83, two KT66 in the power stage and a GZ34 rectifier. It's the GZ34 rectifier that helps recreate the sublime output stage compression and clean sustain associated with the "Bluesbreaker" head. To make the 2245HW as authentic as possible, Marshall used original thickness, original pitch matrix, point-to-point tag boards, Drake transformers and valve tremolo.