Controls: Preamp, Bass, Middle, Treble, Master, PresenceTubes: 3x 12AX7 Preamp / 2x EL84 PowerRectifier: Solid State * Cabinetry: Multi-ply, void-free hardwoodChassis: 16 gauge, cold-rolled steelOutput * Input Power: Multi-tapped power transformer at 100v/120v/220v/240v and standard IEC connectorDIMS * Power: 20 watts into 16 ohm or 2x 8 ohm speaker outputs