Bass guitar micro amplifier with a power of 5 W modeled after the Ampeg SVT amp. The amp has one channel and is controlled by a three-band EQ and Gain and Volume pots. It works with speaker cabinets of various impedance (4-16 Ohms) and offers a headphone 3.5 mm jack input for silent practicing and an AUX jack input for any music device. Thunder Bass also houses an effects loop and it is powered by a 18V adaptor which is included. Dimensions: 128 x 75 x 59.5 mm. Weight: 440 g.