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In Reply to: RE: New Room Measurements posted by bhjazz on May 14, 2009 at 10:41:22
Read the Asylum FAQ on speaker placement methods. There are a number of methods, all of which yield slightly to largely different layouts but some of them are really only practicable in a dedicated room and some can be used in a living room where there are constraints on where you can put things. Experiment a bit with where the speakers and listening position go because this can make a big difference to your results and it's free, apart from your time and effort in moving things around. Good placement of speakers and listening position will minimise the effect of the room upon the sound but it can't eliminate all room effects on its own.
Traps will definitely help but, as I said, it depends on the effectiveness of the traps (not all traps are equally effective) and how many you use. Frequency isn't a big issue unless you use something like Helmholtz resonaters which have a narrow bandwidth and have to be tuned to your specific problem frequencies. Traps using fibreglass are broad band and work over a range of octaves so you don't have to worry about frequency but their effectiveness is falling off as frequencies drop below 100 Hz. Greater thicknesses and placement with air gaps behind them extends their range of operation to lower frequencies but takes up space and increases cost. If you're going DIY make sure you get the density right because if you don't use dense enough materials you won't get the performance you want at low frequencies but provided density is in the range of 2 to 6 lbs per cu. ft. thickness is much more critical than density.
David Aiken
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