Inspired by the iconic AMPEG SVT, the thunder bass head offers bass players massive tone in a portable, lightweight package. The SVT has been an industry standard for decades and now you can obtain these tones without having to haul cumbersome amps with large speaker cabinets around. You get that classic SVT tone in a low-wattage, ultra-portable package. The simplified control layout features a single volume, along with a user-friendly 3-band eq with bass, mid and treble controls. You will be able to dial up warm, clean tones or a huge overdriven stack sound. Speaker out can automatically fit cabinets of different impedances ranging from 4-16 ohms that will drive whichever speaker cabinet you desire. There's even a headphone output for late night practicing, so you can jam into the wee hours of the morning. Additional premium features include an FX loop for using external effects and master volume and gain controls. An 18v dc power supply adapter is included.