SCM-15T PA Column Speaker For indoor and outdoor uses, such as in auditoriums, lounges at airports, and halls. Use under the eaves of a roof if weather-resistant. Speaker dust protection with a foam layer. For greater audience coverage, a speaker array emits a sound beam in the forward direction. Hardware and mounting clamps are provided. Column speakers are housed in a silver-ash-painted metal cabinet. Speaker connections are made at the back via a terminal strip. Available in low impedance and 100V line matching transformer versions.