Home Theater Hacks by Brett McLaughlin

Author:Brett McLaughlin [Brett McLaughlin]
Language: eng
Format: epub
Tags: HOUSE & HOME / Do-It-Yourself / General
ISBN: 9780596550622
Publisher: O'Reilly Media
Published: 2009-02-08T16:00:00+00:00

Tip

The measurement 565 feet/sec is roughly half the speed of sound; you are calculating the frequency of half a wavelength of your room's dimension by doing this.

Say your room is 24 x 18 x 8 feet. With your sub placed in the corner, you'll have room modes at roughly 24, 32, and 70 Hz (you'll also have a full-wavelength room mode of the 8-foot dimension at 35 Hz). If you had some extensive schooling in physics and acoustic theory (or access to the right computer software), you could get a pretty good picture of how all the different frequencies will interact with your room when produced from different locations. The problem is that the majority of us don't have access to the software, and fewer of us have the knowledge to work it all out!

The bottom line is that you have to experiment to find the best location in a room for a subwoofer. This location will be the one that causes the most even distribution of standing waves in your room. The more even the distribution, the more even your subwoofer's frequency response will be, and the better it will sound. See "Optimize Subwoofer Placement" [Hack #52] later in this chapter for one of the best and easiest methods to correctly place a subwoofer in a room.

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