The MEZZ-8-SURR in ceiling speakers are Artison’s first introduction into this category. The latest surround channel satellites use same high quality components as front channels and deliver same level of high performance. Two tweeters are placed at sixty degrees to one another with the rear firing tweeter out of phase with the front tweeter and woofer. This substantially reduces the directional component of sound, without eliminating the exciting three dimensional effects of being there. The cabinets are made of durable ABS with glass fiber and come with Circular A.I.R (Artison Integration Reference) Grilles, square A.I.R. grilles can be ordered separately.