The JCA12S+ 1x12 Guitar Speaker Cabinet 100W takes the tried and true 12S a step beyond, with THD porting and an integrated Jet Direct speaker-emulated output box, designed by Doug Roberts of Roberts Retrovalve. Mic the custom-voiced Eminence driver traditionally or take the Jet Directs simulated micd speaker output directly to the board via XLR. The 12S+ has a 1/4 Thru output that allows you to power a second cabinet in parallel, AND a convertible back baffle that allows for closed or partially open-back operation.