Tube: one 12AX7 (preamp)Single channel. And one twist of the gain knob will show that, despite its adorable stature, this thing is no novelty. Using the built-in CabSim headphone output - which simulates a 4x12" cab output through headphones or as a direct out - or the optional PPC108 1x8" cab, The Micro Dark is an ideal practice rig.
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