SDA owners Placement Advice

Zen Dragon

Hey, got a question for the SDA owners out there who have experimented.
I eventually want to get a set of SDA's, and I know the placement recommendations are flat against the wall, facing straight out, 4-6 feet apart min, and 3-4 feet away from the end walls min.
Here is my question. I could meet these requirements in my Rec room, but in my living room I can not. I would rather use SDA's on my main Liv Room rig. I have a fireplace on the long wall, and the short wall has 3 large windows that I would have to block the sunlight to set the speakers andTV up on. I presently have my set up in the corner, which works decent with my present set-up.
Has anyone ever set up SDA's in a corner set up with the speakers at an angle to the wall. How much does it degrade the imaging?
Thanx for your answers in advance.

hoosier21

Interesting question, it might work ok.

RuSsMaN

Won't an angle fubar the SDA's stereo image? Placement is key with this series, is it not?

I'm not saying it won't be listenable, but to do what they are intended to do, no 'toe' whatsoever. Right?

madmax

I have often wondered if that would work but have not tried it. It should since the sda's are not using side walls to do anything.
madmax

Zen Dragon

Originally posted by RuSsMaN
Won't an angle fubar the SDA's stereo image? Placement is key with this series, is it not?

I'm not saying it won't be listenable, but to do what they are intended to do, no 'toe' whatsoever. Right?

I think the reason for "no toes" is to prevent the sound fields from crossing each other. If they are placed facing out at the same angle this would not happen. What I am concerned with is if/how they use the walls behind and to the sides.
I am sure as more people browse this post, someone must have been in a similiar situation and tried it. Hoping for good news.

RuSsMaN

Not arguing, just discussing, but the flat placement, parallel to the wall, is part of what the SDA design is built on.

There are several 'timing' issues incorporated into the SDA that I think apply here.

1. Time required for sound from the main driver to reach the nearest ear.

2. Time required for sound from them dimensional driver to reach the nearest ear.

3. Time required for the main driver crosstalk to reach the opposite ear.

4. Time for the dimensional driver crosstalk to reach the opposite ear.

If you change the angle of incidence the SDA's are on, relative to the listener, the pre-determined 'interaural time delays' are no longer accurate, right?

Cheers,
Russ

Just for **** and grins, I pushed my CRS in the corner, and tried a couple different angles. Still sound good, but the stereo image is GONE.

(if you don't have Polk's 1984 white paper 'SDA Designed in Stereo' by Matt Polk, ask for it, I'll glady make copies and mail them on)

hoosier21

I read his message that he would turn (angle) the speakers to where they would be facing the listener, the only problem would be the bass might not be as strong by not having the rear wall to help out.

Zen Dragon

Originally posted by RuSsMaN


Just for **** and grins, I pushed my CRS in the corner, and tried a couple different angles. Still sound good, but the stereo image is GONE.

(if you don't have Polk's 1984 white paper 'SDA Designed in Stereo' by Matt Polk, ask for it, I'll glady make copies and mail them on)

Russ thanx for the offer, you've got mail.

Sorry to hear your SDA's lost the stereo image in a corner. That's the whole point of SDA

RuSsMaN

At an angle to the wall, but perpendicular to the listener, not toed.

Jesus Christ my comprehension of the intial post was WAY off base. I see what you are saying now, I thought you were placing them on a 45 IN the corners.

Cheers,
Russ

Zen Dragon

LOL. Sorry for the confusion. Yes perpendicular is the vocabulary word I should have used.
I wanted to use it but the word would not come to mind. I was thinking, I know there is a word to describe this, but damn if I could think of it. Perpendicular... 5 syllables....good 25 cent word for the day.
So if you put your CRS's in a corner perpendicular to the listener, do you still lose the stereo imaging?
Thanx for all the help.

hoosier21

Now I'm confused

abmarsh

If you mean that the speakers will be facing the same direction, not angled toward each other, the stereo effect will be fine.

I had my system set in a corner at one apartment I lived in. It might not be optimum, but it didn't seem to have a negative impact on imaging.

If, however, you place the speakers along the two adjacent walls so that they're facing 90 degrees to each other rather than parallel and facing the listener, you've just defeated the SDA technology. They'll sound good, but their imaging will be "ordinary".

Zen Dragon

The Tv would be in the corner out from the wall. The 2 speakers would be slightly off to either side of the TV, facing the listener, not each other.