# Fine Tunes

## Fine Tunes #2 Page 2

"To determine initial speaker placement, multiply ceiling height by 0.618 (10' * 0.618 = 6.18') to determine the distance from the rear wall to the center of the woofer (or the acoustic center of a panel). Then multiply the room width by 0.276 (width * 5 ÷ 18) to determine the distance from the side wall to the center of the speaker (16' * 5 ÷ 18 = 4.4'). I have run into times when the geometry of the situation makes this setup less than favorable. So I've derived a simple plan 'B' that inevitably works if plan 'A' doesn't. In plan 'B' the speaker side-to-side placement is the same (room width * 5 ÷ 18), but woofer face-to-rear-wall distance is the same as the speaker center-to-center distance (room width * 8 ÷ 18). It's usually easy to try both positions by sliding the speaker straight forward a foot or so. If you play a good bass cut while you move the speaker, you'll hear the sound sweeten up when the speaker hits the 'pocket.' I've yet to find a symmetrical rectangular room where one of these two setups didn't work."