Environment-resistant EN54-24 certified SM Series loudspeaker systems offer quality sound reproduction and contemporary styling in a compact enclosure. System components consist of a highly efficient woofer section and ferrofluid cooled mylar high frequency device. Vocal and musical clarity is optimized by the mathematically conceived, advanced design of the AtlasIED TRX Control WaveGuide high frequency director. This design provides smooth, even sound coverage (90° x 90°). The high frequency section is symmetrical, for equal coverage in both vertical and horizontal cabinet mounting positions. High frequency component protection is provided by the AtlasIED Poly Guard protection circuit. Both drivers feature low-flux-leakage designs enabling the speaker to be used in close proximity to video monitors. For critical video monitoring applications, a minimum distance of 18" from the edge of the loudspeaker to the edge of the screen is recommended. The SM42TEN-B and SM42TEN-WH includes an internally mounted 16W 70.7 V/100 V line matching transformer with screwdriver adjustable external tap selection for use in distributed sound applications.