jbl synthesis scl 7xlJBL Synthesis SCL 7XL Built in speaker with directional sound for home theater JBL Synthesis SCL 7XL is an in wall speaker developed for home theaters where you want a discreet solution that also gives you the ability to direct the sound precisely toward the listening position. It works as both a surround and center channel and fits well into installations where the speaker cannot necessarily be placed ideally. With a compression driver, HDI horn, and