Theory Audio Design SB75 Soundbar Speaker (Black) (Ex-Demo) In-Wall Speakers 4 x 6" mineral-filled polypropylene

4 x 6" mineral-filled polypropylene cone with Nitrile-Butadiene Rubber (NBR) surround

61-inch panel

For advanced applications - larger format surround sound and distributed audio - the ALC-1809 is a virtual audio swiss-army knife: including 9-high power amplifier channels

USB-A and USB-C charging ports

Theory Audio Design SB75 Soundbar Speaker (Black) (Ex-Demo) In-Wall Speakers 4 x 6" mineral-filled polypropyleneCondition Report: Good Condition, minor scuff marks on rear Product Overview Theory 3 channel soundbars provide reference level, theatrical quality sound from sleek contoured enclosures sized to look perfect underneath your TV. Key Features High Output Three Channel Soundbar for 75" TVs Passive, Requires 3 THEORY ALC Amp Channels 3 Separate sealed enclosures 6 x 5" Carbon Fiber Low Hz Drivers, 3 x 1. 4" THEORY Advanced Polymer Compression Drivers 58Hz