5W Analog Bass Amplifier Designed Based on the Ampeg SVT Sound hotone binary amp The Thunder Bass is a 5W / Class AB bass amp head. With its wide dynamic range and powerful sound, it can handle a variety of playing styles. The low-end reminiscent of the SVT and the exquisite drive sound, which are hard to imagine coming from such a compact body, are truly impressive. The output from this unit to the speaker automatically supports 4Ω to 16Ω. You can connect it not only to small cabinets for home use but also to large 4 x 12” cabinets in the studio to enjoy powerful sound. This unit features an effects loop, line/headphone output, and an AUX input for connecting a music player. It's the perfect tool for practice and home recording. Lightweight & compact design: 440g, 128 (W) x 75 (D) x 59.5mm (H) Class AB / 5W output with analog circuitry 3-band EQ for tone shaping Effects loop for connecting external effects Power amp design that automatically supports 4-16Ω cabinets Equipped with headphone/line output, convenient for practice and recording Aux In terminal for connecting a music player I am selling this because I no longer use it. Thank you for looking.