Alesis M1Active MKII User Manual - Page 32

Surround Sound PLACEMENT OF REAR SURROUNDS The following suggestions for optimal M1 Active Mk2 placement are derived from several sources: 1) Standard industry practice for home installations as recommended by the manufacturers of surround encoder/decoder units; 2) recommendations developed by Tom Holman for setting up THX surround theater sound systems, and 3) Alesis engineers' experience fine-tuning the performance of the SMS Monitoring System in order to find the mounting configuration which results in the most natural and accurate surround placement. With the many different playback systems in use, there is room for interpretation of what the best placement is in a control room, but the following represents a good starting point which you are free to change to your taste. Vertically, the M1 Active Mk2s should be placed on the side wall of the control room, above your head, with the woofers on top, tweeters on the bottom. The ideal location is to have the center of the speaker (between the woofer and tweeter) at 80% of the floor-to-ceiling height. (For a standard 8 foot ceiling height the center line would be at 96" x 80% = 76.8" from the floor.) Recommended positioning of surround speakers CL 20% Point Surround tweeters mounted down 3'min 80% Horizontally, place the M1 Active Mk2s slightly behind the 90° position, at 110° on each side. Make sure that at the position used, there is still at least 3 feet to the back wall of your studio. If you do not have at least 3 feet to the back of your studio, then the speakers will work better if placed diagonally in the rear corner as shown on the next page. 34 M1 Active Reference Manual