This bass guitar amplifier features a 20-watt amplifier and an 8-inch driver. It reproduces frequencies from 70 Hz ~ 10 KHz with a total harmonic distortion of 0.5% (typical). It also has a built-in, switchable active compressor. It features a 3-band EQ, with the bass EQ centered at 100 Hz, mid-range EQ at 800 Hz, and a treble EQ at 6 KHz. It features a 3.5mm line output with an impedance of 1 kilohm, for directing the output signal to a mixer, recorder, or another amp. The 3.5mm stereo headphone output will defeat the internal speaker for quiet practicing.