First reflection panels with SDA 2B
gmcman
Posts: 1,806
Now my gut says not to have anything at the first reflection to fully benefit from the SDA effect but I wanted to ask anyway. I have been playing around with speaker placement in my rectangular room and I am starting to construct the sound panels.
My second question is would I benefit more from panels in the rear of the room, behind my listening position, than nearest my listening position? I assume that the SDA's need to work their magic from the speaker to my ears and nothing more, thus any reflections from the rear would have more of a negative effect on SDA's than regular speakers.
We have already established the fact my room is slightly too narrow for the SDA's @ 13'2" but for time being I need to keep them on the short wall. I planned on moving the panels around and test their locations but just looking for opinions. The room is 23' long and the sweet spot is about 5' from the speakers, about 8' from the wall behind the speakers, this gives roughly 15' behind my head.
Not trying to deaden the room completely but to benefit the SDA's any way I can. I will put them on the long wall eventually but not in the near future.
Here's the front and back.
The couches aren't in the same location, the short one on the left is perpendicular almost at the halfway point and the Ikea chair is gone. I have touched on this slightly before but I am going to start the panels this week.
The rear of the room with the fireplace is an old pic, about 5 years but shows what I have to work with as far as space on the walls.
My second question is would I benefit more from panels in the rear of the room, behind my listening position, than nearest my listening position? I assume that the SDA's need to work their magic from the speaker to my ears and nothing more, thus any reflections from the rear would have more of a negative effect on SDA's than regular speakers.
We have already established the fact my room is slightly too narrow for the SDA's @ 13'2" but for time being I need to keep them on the short wall. I planned on moving the panels around and test their locations but just looking for opinions. The room is 23' long and the sweet spot is about 5' from the speakers, about 8' from the wall behind the speakers, this gives roughly 15' behind my head.
Not trying to deaden the room completely but to benefit the SDA's any way I can. I will put them on the long wall eventually but not in the near future.
Here's the front and back.
The couches aren't in the same location, the short one on the left is perpendicular almost at the halfway point and the Ikea chair is gone. I have touched on this slightly before but I am going to start the panels this week.
The rear of the room with the fireplace is an old pic, about 5 years but shows what I have to work with as far as space on the walls.
Post edited by gmcman on
Comments
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You want to have first reflection point panels with your SDA's. This will actually enhance the imaging from your SDA's, not detract from it. After installing panels in my audio room, the imaging improved a good amount. I have SDA-SRS 2.3TL's. Also, don't forget the lower frequency (thicker panels i.e. 4 inches or more, 6" preferred) in the corners. You want your first reflection points to be 1" thick for higher frequencies and upper midrange. This will prevent image "smearing" by preventing the reflections off your walls (at the first reflection points) and then continuing to bounce around the room blurring the imaging. You will like the results after being installed. Just make sure you get the first reflection points correct for your seated position (and all seated positions if there are more behind where the main listening seat is located).
About your speaker placement. Unfortunately there is not really enough room to get a "true" SDA stereo signal. SDA's require a minimum of 3 feet, and I have found much more space is much better. It would be much better to put the 2B's on a longer wall if possible. I would not buy panels and install them until you can do this.
Taken from a recent Audioholics reply regarding "Club Polk" and Polk speakers:
"I'm yet to hear a Polk speaker that merits more than a sentence and 60 seconds discussion."![:\](https://forum.polkaudio.com/resources/emoji/confused.png ":\")
My response is: If you need 60 seconds to respond in one sentence, you probably should't be evaluating Polk speakers.....
"Green leaves reveal the heart spoken Khatru"- Jon Anderson
"Have A Little Faith! And Everything You'll Face, Will Jump From Out Right On Into Place! Yeah! Take A Little Time! And Everything You'll Find, Will Move From Gloom Right On Into Shine!"- Arthur Lee -
Yes the placement of tall shelves or objects close to the speakers on the outside have the same effect as walls. Remember 3 feet minimum on the sides and nothing taller than 3 feet in between the speakers. I used to have a 4ft tall stereo rack in between the speakers close to the right one, removing that made all the difference. If you have to do that at least put the front of the speakers 6 inches + past the front of the objects.POLK SDA 2.3 TLS BOUGHT NEW IN 1990, Gimpod/Sonic Caps/Mills RDO-198
POLK CSI-A6 POLK MONITOR 70'S ONKYO TX NR-808 SONY CDP-333ES
PIONEER PL-510A SONY BDP S5100
POLK SDA 1C BOUGHT USED 2011,Gimpod/Sonic Caps/Mills RDO-194
ONKYO HT RC-360 SONY BDP S590 TECHNICS SL BD-1 -
When I can figure out a seating arrangement I will end up placing the speakers on the long wall. Unfortunately for me right now I need to live with them on the short wall. I can get 3 feet when I move everything more to the left but that's the max.
I have some Roxul laying around so I will put together some panels and place them accordingly but permantly mount them once I have the speakers moved. I shouldn't have too much of a problem to mount them now and make them stay put.
