Ibanez TSA15 1 x 12 15-Watt All-Tube Combo Guitar Amplifier Super-versatile all-tube 1 x 12" combo guitar amplifier with classic Tube Screamer tone circuit onboard 15-watt tube guitar amplifier that gives you more than enough output for midsize and larger venues By passable Tube Screamer tone circuit includes Overdrive, Tone, and Volume controls Switchable 6dB boost lets you kick the preamp section into high gear Optional IFS2G footswitch (not included) lets you toggle the Tube Screamer and 6dB boost on the fly