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In Reply to: RE: Question about dealing with mid-bass bloat. posted by pkats on March 19, 2008 at 07:18:47
David, the Bachs are actually floorstanders, albeit smallish ones. I understand your point about the frequency bump but I have never heard this type of mid-bloat or congestedness out of the Bachs and have heard them in several different situations/systems. They can have some lower bass boom if not placed far enough out from the rear wall.
They are about 3 feet out from the rear wall, 3 ft from one side and almost 4 ft from the wall that was exposed. They are about 7.5 ft apart. I can move them further out from the rear wall but would rather not.
Ethan, I am sure that would make a better bass trap. Unfortunately I don't have enough panels for that. I will be building some real ones in the future. Should I take the plastic facings off of the panels at first reflection points also? Or does that depend on what frequencies I am trying to tweak.
Like I said, I think way too much has happened at once. I am going to put everything back the way it was (except the exposed wall, can't do anything about that yet), take down the panels, and start over again. Tweaking a little at a time, listening for changes, and having fun with it.
I might even purchase some measuring equipment in the future.
Thanks again!
Follow Ups:
> Should I take the plastic facings off of the panels at first reflection points also? <
Yes. First reflections are mainly a mid / high frequency issue.
--Ethan
Indeed an interesting point, but IMHO only relevant if you intend to both hear and "listen to speakers" instead of the recorded sounds themselves "in your room"...
I haven't had them in my big rig--or listened to them critically--for several years. But, in my small room, I used to have them set up fairly nearfield, firing straight ahead and not particularly wide with plenty of room away from wall boundaries.
In addition to your room treatments: If you have the bi-wire version, you might try reversing the polarity of the tweeters with your bi-wire cables or jumpers. And loosely stuffing the rear ports with batting of some sort. The latter helped tame a nasty node I had, without noticeably degrading LF extension.
I've got Dynaudio Contour 1.3 SE monitors on stands and their front faces are a fraction under 2 metres, a bit over 6.5', in front of the wall. They sound much better there than they do back half that distance from the wall—I know because I had them that far from the wall in my previous room.
Placement may not be the cause of your problem but even if it isn't, I think you may be surprised what getting many speakers as far out into the open as you can can do for their sound.
David Aiken
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