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In Reply to: RE: Ponders to question posted by DragonEars on April 22, 2015 at 00:34:24
#1 two identical signals meeting at 180 degrees would be reversed in polarity, No? That's what I meant by a strong mono signal.#2 Consider standard "in the box" thinking about null points and first reflection points. They all meet at the ear and the brain/ear interface puts them together.
#3. The reflection off the panels is a bonus. You can place a single vertical panel and still hear differences although it will not be as marked. The key is the blockage must block left signal from right signal! Few cabinets or racks are set up so
As my contention goes, the left /right common signals meeting in the middle are never really precisely equal. The left channel may be slightly stronger at a particular frequency bandwidth and the right at another. This,in my hearing, causes a slight wavering, if you could say, in the precise center image. Oh, its not really serious, for the most part, but with the system in place focus becomes rather startling. Its like switching from an Instamatic camera to a good SLR (whoops giving away my age)To be honest in going to CES since 1982, I have never heard imaging how I can get it no matter what the system cost was.
Of course YMMV and FWIW
That being said,a couple big pieces of cardboard and you can easily try this. We will wait for our French audiophile to report back ( hopefully). No cardboard big enough?: stack a few boxes on a bar stool
Edits: 04/22/15Follow Ups:
"We will wait for our French audiophile to report back ( hopefully)"That will be done this Week end!
I've received all the things to build your z-sleeve receipe mabe this week too!
:)
PS: In you fisrt post you said the panels where in touch at the v-point, but I don't see it on the picture...
Edits: 04/22/15
I meant if the panels touch at the point it is ok. This applies to those who use a room divider. Because I happen to use room tunes(I used to sell them), the bases force me to spread the panels at the point.
In the back against the wall, in the photo, you can see a stack of m'pingo wood on some EAU devices on a speaker stand. Curiously the m'ping turning stock helps increase the depth of the soundstage ( Gilmor woods in Portland, IIRC, sells them). You can see the bell sticking up, and it makes an interesting alteration to sound, even though cracked.
When a local music store closed I made contact with their repair man and scored some broken clarinet bodies which are made from m'pingo ( as are oboes for that matter. I stripped them of the keys and find I can use them in a similar fashion. Buffet Crampton, long the pinnacle of clarinet manufacturers (there are others now) is based in Paris, IIRC, so maybe you can find some dead instruments for minimal price.
The m'pingo blocks in the center front on the floor actually moves the sound stage a bit more forward, BTW, counter balancing the blocks in the rear. I haven't tried too many other woods but have experimented with cocobolo, rosewood, snakewood, and a few others
Hi Stu,
First test of you pool table tweak.
I found two boards and quickly screwed them together.
On the album of Serge Gainsbourg, "Melody Nelson" I heard much better voices with a more "organic sense" but I noticed too that the singers seemed to move from center to the right.
I will continue testings and find maybe better angle...
Apex of the two panels is quite critical: sometimes only a degree or two makes a huge difference. You may be hearing some of the reflection off the floor on the right side too 8^).When the room is asymmetrical don't be afraid to set up the panels likewise.Might be easier to use those double hinges or even a L bracket on the bottom
Then again on the Joan Baez live album I was perplexed because her voice was slightly off center (at least on my favorite track). Then I let the Lp play on she popped into dead center !. Apparently from the photos she would simply shift her stance and move her weight from one leg to the other while the mike remained the same....
PS on closer examination seems like the left panel protrudes a bit further than the right panel. Makes a difference. even a centimeter or so...
Edits: 04/25/15 04/25/15
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