Bogner Alchemist Tube Guitar Amplifier Head 6L6 class-AB power section and five-12AX7 preamp; selectable power section (40 or 20 watts) Channel 1 (Gold): Gain, Treble, Mid, Bass, Volume, Crunch mode, variable Bright, Deep switch; Channel 2 (Mercury): Gain, Treble, Mid, Bass, Volume, variable Bright, Mid Shift; Shared: in parallel, Reverb Type, Reverb Level, Delay Type, Delay Level, Delay Repeats (Feedback), Tap Tempo Included four-button footswitch controls Channel Select, Boost, Delay and Reverb Parallel effects loop Eye-catching retro-modern fit-and-finish 6L6 class-AB power section and five-12AX7 preamp; selectable power section (40 or 20 watts) Channel 1 (Gold): Gain, Treble, Mid, Bass, Volume, Crunch mode, variable Bright, Deep switch; Channel 2 (Mercury): Gain, Treble, Mid, Bass, Volume, variable Bright, Mid Shift Shared: in parallel, Reverb Type, Reverb Level, Delay Type, Delay Level, Delay Repeats (Feedback), Tap Tempo Eye-catching retro-modern fit-and-finish Parallel effects loop