Features 200 Watt Professional Sound Quality Quick and Simple Installation Shallow Mount Design Stainless Hardware Tuned Sealed Enclosure with a Passive Radiator IP65 Environmental Protection FUSION?s Sound-Panel combines two 4? speaker drivers two soft-dome tweeters and a large-surface passive radiator inside a perfectly-tuned enclosure achieving professional sound quality in a shallow-mount form-factor. With a maximum mounting depth of only 41mm (1-5/8?) the Sound-Panel solves the age old problem of delivering professional sound quality from within the shallow mounting depths required in many installations. The Sound-Panel is designed for easy installation. Both the left and right speaker wires from the source unit or amplifier only need to be wired to one location for connection saving time and money. With only a 41mm (1-5/8?) mounting depth required the Sound-Panel will fit flush in most locations. Optional mounting spacer accessories are available to create a professional indoor or outdoor installation.