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June 22, 2008 - 5:38pm
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Help to interpret lowfreq test
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You've got a room mode cancelling bass at 60, 120, 240 hz and further up the spetrum not shown.
What are your room dimensions and where are the speakers placed?
Dave
My room dimensions are 24ft x 11ft 7in x 8ft (LxWxH).
I have the listening position according to the 38%rule. (0.38*24 = 9.12 ft away from front wall). The speakers are seperated 6ft. (The side of equilateral triangle formed by 2 speakers and listening position is 6ft).
Well you length is very close to double your width. Is it lively or dead? What speakers?
I'd start with speakers much closer to the back wall, unless you've got dipoles. You're losing tons of bass with them that far into the room. Look at my review of "The Sumiko Speaker Set" elsewhere on this site. It's a minority view, but it really works.
A more conventional solution will involve lots of room treatment. Still, I'd try getting nearer to the wall to see if you can save some money with placement rather than treatment.
Dave
Hello dcstep,
My speakers are 3ft away from the front wall. Do you think I have to go closer. Please look into the photo shown in this link for a sketch of my speaker positioning.
http://picasaweb.google.com/mailpradeepg/Pradeep_Acoustics
Pradeep
Hello dcstep,
I am not able to tell if the sound is lively or dead. I have Monitor audio RS6s hooked up to NAD c352.
Pradeep
If you could put them on the long wall you'd get rid of side-reflection issues. As it is, they can go much closer to the rear short wall.
Is there carpet and a good bit of stuffed furniture? If so, then you're room is likely neutral to dead. If there's wood or hard floors and little furniture, then it's likely lively.
How do you like the sound as is??? The response is actually fairly smooth except for those suckouts that are due to the room. Try moving the speakers a lot closer to the wall and see what happens. I predict that you'll raise a big hump, but lessen those suckouts. Then you can move the speakers in an out an inch or two at a time and you'll be amazed at how that bass hump goes away with just a small movement. Do it with your ears and then verify it with the measurements.
Dave
As a rule firing speakers DOWN the long dimension of the room usually results in the flattest and deepest bass response. Since I'm stubborn I've tried breaking this rule in a number of rooms and it's always performed better firing down the long ways. Obviously this isn't always possible if room aesthetics are taken into consideration but from a purely acoustic point of view firing down the long dimension of the room is the way to go.
That looks about right for a typical domestic size room. Kinda puts into perspective what really matters with audio playback!
As Dave said, the solution is room treatment, and especially bass traps. That's a decent size room, so plan on at least four bass traps as a bare minimum. No room can ever be perfectly flat, so the more bass traps you have the closer you'll get. It's really that simple. Even 20 traps would not be too many, though you don't necessarily need 20 for good results.
--Ethan
Ethan do you offer any products that are more decor friendly and blend into the living room surroundings? The stuff I saw on your web site is very industrial looking.