The low profile loudspeaker has been engineered for underfloor and low-profile plenum installations. Four 3-inch full-range drivers (100 to 8000Hz, ±6dB) are mounted at 90° angles for uniform 360° masking dispersion. The drivers are directed 53° from vertical in order to avoid the creation of standing waves and maintain more localized sound distribution compared to horizontally-directed drivers. The speaker is housed in durable, sealed steel enclosure that may be bolted directly to the ceiling or floor deck. In underfloor applications, the loudspeaker may be secured to the raised floor support. Four rubber feet prevent vibration from transmitting to the floor deck.