Acoustic Image Coda S4 611-AA-Plus 2 Channel Convertible Combo, balanced high fidelity sound, two-way sealed speaker system, 10" downfiring woofer, 5" extended range driver, lightweight molded polymer enclosure, Cabrio Docking Sytem (tm), means that the head is removable for use as a stand-alone unit, four-band EQ preamp section per channel, combo jack inputs (either 1/4 in or XLR, phantom power on XLR inputs, input and master level controls, effects loop with return level control per channel, digital effects with 6 presets and level control, switchable low-cut filter per channel, phase reverse switch per channel, balanced direct out with ground lift, mute switch and pre/post EQ for direct out, stereo capable with external power amp, headphone output, 600 Watt switch mode power amplifier, switchable dual voltage operation (115/230V), comes with a fitted slip cover with cord storage pocket and shoulder strap.