Model SD72WV is a 25 watt 8" (205mm) speaker with a 10oz. (260g) ceramic magnet. It includes a curvelinear, treated paper cone for lower harmonic distortion. The speaker is also equipped with a full 1" diameter copper voice coil with a black anodized aluminum former for better power dissipation. Model SD72WV operates within a frequency response range of 45Hz to 19kHz (nominal) with a sensitivity of 97dB and a dispersion angle of 105deg. Package includes factory installed 25/70.7V line matching transformer with tap selections ranging from 0.25 to 5 watts. The SD72WV includes a factory installed CRS baffle with concealed speaker mounting studs and includes screw mount hardware. The SD72WV baffle features standard mounting holes to accommodate the majority of AtlasIED 8" tile bridges, mounting rings and enclosures. The CS95-8 enclosure is furnished with four combination conduit knockouts 1/2" to 3/4" (13 to 19mm), four J-clips and two flexible perforated mounting straps. One-piece CRS construction, undercoated, patch-jute lined, and finished in epoxy. The 81-8R tile bridge features a round cut-out designed to work with the CS95-8 enclosure. The unit is constructed of 24-gauge CRS with an electrogalvanized rust-resistant finish.