Randall T2H 400-Watt Guitar Amp Head A two channel all tube preamp with 3 modes: Mode 3: A boosted overdrive with punishing gain and liquid sustain. Mode 2: Classic overdrive channel for vintage to modern tube tone . Mode 1: Full tube clean with warm tone and big headroom 400W @ 4 Ohms, 280W @ 8 Ohms, 500W @ 2 Ohms Programmable Series or Parallel Effects loop with single On/Off switch. Can also be activated for any/all channels then stored and recalled by the included MIDI foot controller. Master "Density" control. Adjusts the power amp low end dynamics. Master "Presence" control. Adjusts the power amp extreme high end dynamics 3 midi switching channels with MIDI in/thru 400W @ 4 Ohms, 280W @ 8 Ohms, 500W @ 2 Ohms Master "Density" control. Adjusts the power amp low end dynamics. Master "Presence" control. Adjusts the power amp extreme high end dynamics 3 midi switching channels with MIDI in/thru A two channel all tube preamp with 3 modes: Mode 3: A boosted overdrive with punishing gain and liquid sustain. Mode 2: Classic overdrive channel for vintage to modern tube tone . Mode 1: Full tube clean with warm tone and big headroom Programmable "Series" or "Parallel" Effects loop with single On/Off switch. Can also be activated for any/all channels then stored and recalled Master "Density" control. Adjusts the power amp low end dynamics. Master "Presence" control. Can also be activated for any/all channels then stored and recalled by the included MIDI foot controller. Programmable Series or Parallel Effects loop with single On/Off switch.