Here's what Ampeg says about the Rocket RB210UK 500W 2x10 Bass Combo:

The 500-watt RB-210 is the ideal portable gigging amp. Dual custom 10" Eminence® speakers coupled with a mutable high-frequency horn reproduce a wide range of bass sounds, while classic Ampeg 3-band EQ, Ultra Hi/Ultra Lo switches, and the new Super Grit Technology™ overdrive circuit enable you to dial in your ideal tone. An effects loop, an auxiliary input, a headphone output, an extension speaker output, and an XLR direct output for connecting to a P.A. or recorder complete the package.