Home Theater Calculator

How It Works

Home theater speaker placement follows Dolby and THX standards: front left/right at 22-30 degrees from center, surrounds at 90-110 degrees (5.1) or 90 degrees with rears at 135 degrees (7.1). The center channel handles 70% of movie dialogue — place it at ear height or angled toward ears. Subwoofer placement matters more than you think: corner placement gives maximum output but boomy bass. The "subwoofer crawl" technique (place the sub at your listening position, then crawl around the room to find the spot with smoothest bass) is the best DIY approach. Reference level is 85 dB SPL — this is the volume films are mixed at, and it is quite loud. Most people listen 10-15 dB below reference. Room acoustic treatment (bass traps, absorption panels) often improves sound quality more than upgrading speakers.