PRS HDRX 4X12 Closed Back Guitar AmpPRS HDRX speaker cabinets feature a closed back design, delivering full spectrum sound. The Celestion G12H 75 Creamback speakers bring girth and articulation, allowing plenty of "woof" without the boom, defined midrange, and clear high end to push from these powerful cabs. With black tolex wrapped poplar plywood, salt and pepper British style knitted weave grill cloth, and PRS Signature logo, PRS HDRX cabinets are a handsome accompaniment to PRS HDRX