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In Reply to: RE: "tweeters toed in 45 degrees tweeters in" ... posted by grantv on April 11, 2016 at 07:41:34
I am thinking that with the wide wall placement you can get better results with tweeters out if there is a constraint on the distance to the front wall. With tweeters out and toe in you can distance the tweeters from the front wall by an extra foot without changing the footprint and you have plenty of distance to the sidewalls.
In lively rooms such as yours appears to be, you want the tweeters about 3' from the sidewalls - or a bit more.
Try it out.
Follow Ups:
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What is the distance of the tweeter to the front wall at listening height? about 3 ft?
With 5 ft to the sidewalls you have plenty of room to swap the speakers to tweeters out.
In my experimentation the squishing of depth is a result of excess early reflections from the front wall. You can get less of that on long wall placements with tweeters out. The distance between the inner edges of the speakers will likely end up smaller than with tweeters in.
Yes, I already have them tweeter out, Satie - and I get a nice wide and high sound stage ... depth is the only thing I'd like to improve. :-((
Distance from the ribbons to the (sloping) wall at listening height - ie. at the benchtop - is about 4'.
What I did on Monday arvo is adjust toe-in of the mid/ribbon panels, with some keen-eared mates present. We found that increasing the toe-in so the perpendiculars from the ribbons cross at the knees - rather than the ears - of the listener ... substantially firmed up the centre of the sound stage! :-)) Unfortunately, it didn't do anything for the depth - so diffusion on the front wall seems to be required.
Regards,
Andy
I should have noticed that the shelf is at listening height.That might just be part of the problem.
Try this- take a couple of towels or fuzzy blankets and put them over the shelf and the stuff on it along the span between the speakers and directly behind them, Don't let the fabric hang too far down below the shelf as all we are trying to do is make it acoustically less intrusive.
Tell us what, if anything, changed in the sound.
Tried this, this afternoon, with a keen-eared mate ... towels, folded into quarters, lengthways.
Did nothing for the depth but might have improved the 'presence' of L Cohen in the room ("Roadsinger"). So I need to play with this concept a bit further.
Thanks,
Andy
I am not sure I understand what you mean by "presence". Is that a tonal issue or an improvement in spatial presentation of the vocal? Did the vocal center image move vs. with the naked shelf? Did L Cohen become more concise and defined - like you can imagine his voice as a conical beam of vocal sound?
Sure - it's an indistinct description! ;-))
With reference to your Qs:
1. Is that a tonal issue or an improvement in spatial presentation of the vocal? See answer to #3.
2. Did the vocal center image move vs. with the naked shelf? No
3. Did L Cohen become more concise and defined - like you can imagine his voice as a conical beam of vocal sound? <> <> Sort of; the 'Roadsinger' recording captures the fact that LC has a slight vibrato - this was displayed more definitively with the towels placed just over the end of the shelf.
As I said, though, more 'playing around' to be done. :-))
Regards,
Andy
I wouldn't consider my room lively...
I have ~4-5' from the sidewalls, the sidewalls have sound absorption at both mirror points, floor is W/W carpeting, and about 10' from my head to back wall.
Picture is old, but those side wall pieces are still there, carpet is the same...
My miss posting.
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