Are people experimenting with SDA
tjcinnamon
Posts: 100
in Speakers
I have the L800’s with the atmos modules. My speakers are 8’ apart (too far) so I don’t get a powerful SDA effect.
I’ve run the atmos speakers in conjunction with the SDA effect and it works great. Is it possible to configure these with a minidsp and delays to augment the SDA? Has anyone been experimenting with enhancing SDA?
I’ve run the atmos speakers in conjunction with the SDA effect and it works great. Is it possible to configure these with a minidsp and delays to augment the SDA? Has anyone been experimenting with enhancing SDA?
Answers
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I don't mean this to sound patronizing or anything.....but, make sure that the SDA cable is firmly connected.
Ask me how I know this.
Just saying, run through the basics first. Connections. Phasing etc...I plan for the future. - F1Nut -
I can feel the cones moving and it’s darn hard to plug-in and unplug.I don't mean this to sound patronizing or anything.....but, make sure that the SDA cable is firmly connected.
Ask me how I know this.
Just saying, run through the basics first. Connections. Phasing etc...
I’m likely good there, correct?
My seat is 9’ back so at 8’ apart it’s too far. However, I still get the effect for sure
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Sda needs side walls- Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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In my experience, sda speakers need side walls atleast 6ft on each side... Equal distance is better- Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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tjcinnamon wrote: »I have the L800’s with the atmos modules. My speakers are 8’ apart (too far) so I don’t get a powerful SDA effect.
I’ve run the atmos speakers in conjunction with the SDA effect and it works great. Is it possible to configure these with a minidsp and delays to augment the SDA? Has anyone been experimenting with enhancing SDA?
When I demoed them they were way more than 8 feet apart and got way more SDA than I cared for.
What are you driving them with?
FYI, the SDA drivers will move even if the SDA cable is disconnected due to the air pressure in the cabinet.Political Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk -
tjcinnamon wrote: »I have the L800’s with the atmos modules. My speakers are 8’ apart (too far) so I don’t get a powerful SDA effect.
I’ve run the atmos speakers in conjunction with the SDA effect and it works great. Is it possible to configure these with a minidsp and delays to augment the SDA? Has anyone been experimenting with enhancing SDA?
When I demoed them they were way more than 8 feet apart and got way more SDA than I cared for.
What are you driving them with?
FYI, the SDA drivers will move even if the SDA cable is disconnected due to the air pressure in the cabinet.
Anthem MCA 325
The way I tested was an REW sweep, I’d play the right speaker and have my hand on the left meaning that no signal was hitting the left speaker (outside of the sda driver)
That said, I can triple make sure they sda cable is plugged into though. My guess is just push on it super hard?
What were the sidewalls like when you demoed them? Mine are about 8’ from the side walls. Nearly equidistant
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IIRC, they were covered with black cloth curtains over sheet rock. The room was what I would call huge.Political Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk -
Ttjcinnamon wrote: »
Not our observations at this year's Polkfest. On the long wall? "Shouty", no sound stage, no bass and in general? Well, they sounded like crap.
We moved them the next day to the short wall and OMG, what a difference! They opened up, the SDA came into play, bass was there and as they opened up? (brand new speakers, never played before) The folks that listened went from thumbs down (kinda) to double thumbs up.
All you have to do is read the Polkfest for this year. It's all documented.
Documentation is just a guide. It's not a rule that must be strictly followed. Trust your ears on what sounds better. Always.
Tom
~ In search of accurate reproduction of music. Real sound is my reference and while perfection may not be attainable? If I chase it, I might just catch excellence. ~ -
Ttjcinnamon wrote: »
Not our observations at this year's Polkfest. On the long wall? "Shouty", no sound stage, no bass and in general? Well, they sounded like crap.
We moved them the next day to the short wall and OMG, what a difference! They opened up, the SDA came into play, bass was there and as they opened up? (brand new speakers, never played before) The folks that listened went from thumbs down (kinda) to double thumbs up.
All you have to do is read the Polkfest for this year. It's all documented.
Documentation is just a guide. It's not a rule that must be strictly followed. Trust your ears on what sounds better. Always.
Tom
Is this the thread? https://forum.polkaudio.com/discussion/194443/carolina-polkfest-vol-5-oct-22-24-2021-north-charleston-sc/p1
I’ve been searching for it but can find the posts with the results -
My bad dude. It must have been on another thread. My apologies about that. The summation of our observations is pretty much wrapped up in the above statement though. If you look at the photos? On day one, we had them set up on the long wall. The next morning, we set them up on the short wall and they didn't move from that location for the rest of the event.
The change was drastic and oh, so welcome. Like a completely different speaker kinda different.~ In search of accurate reproduction of music. Real sound is my reference and while perfection may not be attainable? If I chase it, I might just catch excellence. ~ -
My bad dude. It must have been on another thread. My apologies about that. The summation of our observations is pretty much wrapped up in the above statement though. If you look at the photos? On day one, we had them set up on the long wall. The next morning, we set them up on the short wall and they didn't move from that location for the rest of the event.
The change was drastic and oh, so welcome. Like a completely different speaker kinda different.
No worries and thank you for helping.
By long wall, you mean far away side wall; and short wall means closer to a side wall.
So if my speakers are 3' away from a side wall vs 8' away from a side wall then the long wall is 8' and short wall is 3', correct? -
Correct.
Tom~ In search of accurate reproduction of music. Real sound is my reference and while perfection may not be attainable? If I chase it, I might just catch excellence. ~ -
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My bad dude. It must have been on another thread. My apologies about that. The summation of our observations is pretty much wrapped up in the above statement though. If you look at the photos? On day one, we had them set up on the long wall. The next morning, we set them up on the short wall and they didn't move from that location for the rest of the event.
The change was drastic and oh, so welcome. Like a completely different speaker kinda different.
Just picked up some cardboard boxes to construct a fake wall. Those should reflect things above 400Hz.IIRC, they were covered with black cloth curtains over sheet rock. The room was what I would call huge.
I’ll be constructing a make shift movable wall for testing!
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Okay, update: confirmed the phase using REW (in addition to looking at how things were plugged in); also confirmed SDA was running with REW
The cardboard helped. Basically I made my room more symmetrical. I’m going to draw up something to post what I did. -
IIRC, they were covered with black cloth curtains over sheet rock. The room was what I would call huge.
Do you think that absorption on the side wall is a good idea or a bad idea?My bad dude. It must have been on another thread. My apologies about that. The summation of our observations is pretty much wrapped up in the above statement though. If you look at the photos? On day one, we had them set up on the long wall. The next morning, we set them up on the short wall and they didn't move from that location for the rest of the event.
The change was drastic and oh, so welcome. Like a completely different speaker kinda different.
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Generally, an acoustic panel at the first reflection point is of benefit. Other than that, no.Political Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk -
Those in the know wrap their entire room in heavy curtains to deaden the sound as much as possible. 😝🤯- Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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Generally, an acoustic panel at the first reflection point is of benefit. Other than that, no.
I just ran some tests, I already had them there and SDA sounded slightly more pronounced with them on the wall. Given they are decorative, it was easier to leave them so.Those in the know wrap their entire room in heavy curtains to deaden the sound as much as possible. 😝🤯
I do need to put up a fake wall. So the question is do I make that absorbative. Given I already have GIK treatments for the fabric it may make sense to just get the absorbstifr for decorative reason. I just don’t want to negatively impact it.
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Those in the know wrap their entire room in heavy curtains to deaden the sound as much as possible. 😝🤯
Yeah......no. Don't be a Danny.
Tom~ In search of accurate reproduction of music. Real sound is my reference and while perfection may not be attainable? If I chase it, I might just catch excellence. ~ -
Im going to put insulation on my fake cardboard wall to see how it would sound. I have some that I used for some other experiments.
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You just are not ready Tom. It's ok- Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit. -
Update: it sounds fantastic with the insulation. Sorry for the mess
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Mess? We have all been there and done that.
Try pulling the mains out from the back wall a tad....no toe in. These are NOT conventional speakers...
Tom~ In search of accurate reproduction of music. Real sound is my reference and while perfection may not be attainable? If I chase it, I might just catch excellence. ~ -
They need to come out at least a foot in that configurationThe Gear... Carver "Statement" Mono-blocks, Mcintosh C2300 Arcam AVR20, Oppo UDP-203 4K Blu-ray player, Sony XBR70x850B 4k, Polk Audio Legend L800 with height modules, L400 Center Channel Polk audio AB800 "in-wall" surrounds. Marantz MM7025 stereo amp. Simaudio Moon 680d DSD
“When once a Republic is corrupted, there is no possibility of remedying any of the growing evils but by removing the corruption and restoring its lost principles; every other correction is either useless or a new evil.”— Thomas Jefferson -
Before the false wall (in cardboard on the right) the toe in made a huge difference. But it was a desperation move. I’ll try to straighten them tomorrow. I toed them in an inch at a time off that media console 6 inches in each direction. 4” seemed to give the best effect pre-wallMess? We have all been there and done that.
Try pulling the mains out from the back wall a tad....no toe in. These are NOT conventional speakers...
Tom -
I’ll give it a shot but why do you say that?nooshinjohn wrote: »They need to come out at least a foot in that configuration
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tjcinnamon wrote: »
I’ll give it a shot but why do you say that?nooshinjohn wrote: »They need to come out at least a foot in that configuration
Because the front baffles of the speakers should not be behind the plane of any walls, equipment racks or other obstructions. The picture looks like the speaker to the right is at least 6 inches behind the wall and it is also corner loaded which is not good.The Gear... Carver "Statement" Mono-blocks, Mcintosh C2300 Arcam AVR20, Oppo UDP-203 4K Blu-ray player, Sony XBR70x850B 4k, Polk Audio Legend L800 with height modules, L400 Center Channel Polk audio AB800 "in-wall" surrounds. Marantz MM7025 stereo amp. Simaudio Moon 680d DSD
“When once a Republic is corrupted, there is no possibility of remedying any of the growing evils but by removing the corruption and restoring its lost principles; every other correction is either useless or a new evil.”— Thomas Jefferson -
You cannot toe in SDA speakers, period.
The right speaker crammed into that corner is a no go.Political Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk
