SUHR PT15 I.R.The PT15 I. R. is the worlds first truly hybrid amplifier, marrying classic tube circuitry with a reactive load and digital impulse response technology. With the PT15 I. R. we set out to combine the strengths of both analog and digital to create something new. The addition of a built in Reactive Load and on board impulse responses, make using a speaker cabinet optional for recording, or feeding front of house with a studio quality miced up tone. Also