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, always active compressor.It features two 1/4 inputs, with separate volume controls for each input, making it perfect for cramped practice rooms or for instruction. It features a 4-band EQ, with the bass EQ centered at 100 Hz, two mid-range EQs at 600 Hz and 2 kHz, and a treble EQ at 6 kHz. It features a 1/4 line output with an impedance of 1 kilohm, for directing the output signal to a mixer, recorder, or another amp.Specifications:Rated Power (10% distortion): 20 wattsRated Power (1% distortion): 15 wattsFrequency Response: 70 Hz ~ 10 kHzTotal Harmonic Distortion: 0.5% (typical)Hum and Noise: -75dB below rated powerInput Impedance: 50 kilohmsPower Consumption: 40 wattsMaximum Input Level: 5 VrmsMaximum Gain: 40dB EQ centered, level maxDimensions: 13.4 x 15.0 x 6.9 (340 x 380 x 175 mm)Weight: 16.5 lbs. (7.5 Kg)*** 30-day easy returns. No restocking fee. Free lifetime technical support. 1 year warranty. ***