ZT Amplifiers Lunchbox Acoustic 75-watt Class A/B Acoustic Guitar/Vocal Amplifier with 6.5-inch Speaker Lightweight and compact pro-quality 2-channel acoustic/vocal amp; 75W Class A/B power amplifier Custom designed ultra-power 6.5" speaker; weighs just 12 pounds Mic channel with 1/4" and XLR inputs; Instrument channel with 1/4" input Independent Gain, Bass, Treble, Reverb controls for both channels; EFX Loop 3-position Anti-Feedback Control with bypass; Switchable 115V/230V