Niles HDFX 150 W RMS Speaker - 2 Pack - Pearl WhiteOverview Specifications Niles HDFX High Defi nition, Side Rear Channel Effects, In Wall Loudspeakers are expressly designed for superior sonic quality in side or rear channel applications. They employ advanced technology components that extract the subtle nuances in recorded music or the thunderous action sound in a movie. HDFX loudspeakers are the perfect choice wherever quality of sound is the most important consideration. General Information