The Reference Premiere Designer On-Wall RP-440D SB is our premium 3-channel passive LCR sound bar. Leveraging the same acoustic technology as our dynamic, detailed, Reference Premiere box speakers in a slim, on-wall solution with an elegant matte finish. Featuring three horn-loaded 1”Titanium Dome Linear Travel Suspension (LTS) tweeters and four 3.5” Cerametallic™ woofers, this premium passive sound bar is the superior choice for minimalist-designed acoustics.