The SYSTEM 19 is a complete, UL Listed, 2-way, shallow depth, lightweight, 2' x 2' ceiling tile replacement loudspeaker system consisting of an 6-1/2" O.D. LF woofer, 1" tweeter, and a 20W-70V rotary select transformer including an 8 Ohm tap. Molded fiber enclosure is 1412 CID. Steel baffle with standard perforation and four (4) seismic tie-off points. Cable clamp is included. No assembly required.