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post #1 of 14 Old 05-21-2019, 08:36 AM - Thread Starter
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Speaker Placement?

Originally I was going to place the LR speakers behind the screen and fill the corners with rigid fiberglass but would I gain anything putting them on the outside of the screen?


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post #2 of 14 Old 05-21-2019, 09:46 AM
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Can you toe them in toward the MLP if yes I would do it.
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post #3 of 14 Old 05-21-2019, 08:19 PM
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Quote:
Originally Posted by BIGmouthinDC View Post
Can you toe them in toward the MLP if yes I would do it.


Yep those look like JTRs, they need to be toed in as their dispersion is very low. Not sure which horn that is but the new ones are only 60 degrees horizontal at -6dB, that means if you are 15 degrees away from on axis you’ll be -3dB which is as much high frequency loss as I recommend.


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post #4 of 14 Old 05-22-2019, 08:04 AM - Thread Starter
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Quote:
Originally Posted by Nyal Mellor View Post
Yep those look like JTRs, they need to be toed in as their dispersion is very low. Not sure which horn that is but the new ones are only 60 degrees horizontal at -6dB, that means if you are 15 degrees away from on axis you’ll be -3dB which is as much high frequency loss as I recommend.


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Yes they are the old JTR Noesis 212HT-LP ones with the 60/40 dispersion pattern. Do I want to try and point them directly at the main listening position then?

Thanks

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post #5 of 14 Old 06-03-2019, 11:04 AM - Thread Starter
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Option 1 or 2? I don't have a lot of room so I can't toe them in as far as I'd like.

Option 1

Option 2
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post #6 of 14 Old 06-03-2019, 01:48 PM
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I'd go Option 2, and stuff the corners with rigid fiberglass like you were going to orginally. I think based on the dispersion pattern, you'd not want to have the -3db at the MLP if you went with Option 1.

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post #7 of 14 Old 06-03-2019, 03:08 PM
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1) I'd slice 1/2 the face of the uprights off in the area of the speaker
2) carve out the treatment in for the back corner of the speaker and angle the speaker as much as possible
3) I'd pull the speaker forward a bit to avoid edge diffraction effects when the screen frame is in place
4) build the outside left and right fabric panels at an angle matching the speakers instead of flat screen wall
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post #8 of 14 Old 06-04-2019, 06:47 AM - Thread Starter
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Quote:
Originally Posted by BIGmouthinDC View Post
1) I'd slice 1/2 the face of the uprights off in the area of the speaker
2) carve out the treatment in for the back corner of the speaker and angle the speaker as much as possible
3) I'd pull the speaker forward a bit to avoid edge diffraction effects when the screen frame is in place
4) build the outside left and right fabric panels at an angle matching the speakers instead of flat screen wall
Kind of like this you mean? The screen frame will go right the edge of the support post so if I notch it out then part of the speaker would be behind the aluminum frame.


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post #9 of 14 Old 06-04-2019, 08:54 AM
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Oh, I thought the screen frame only went to the middle of the front face of the upright. If it goes to the outside edge you really don't have room to place the speakers outside the screen. The reason to go to the middle is so you have a backer for the outside fabric panels.
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post #10 of 14 Old 06-04-2019, 08:58 AM - Thread Starter
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Quote:
Originally Posted by BIGmouthinDC View Post
Oh, I thought the screen frame only went to the middle of the front face of the upright. If it goes to the outside edge you really don't have room to place the speakers outside the screen. The reason to go to the middle is so you have a backer for the outside fabric panels.
Damn didn't think of that. So would you do option 2 then? Is it going to reflect off the sub though like that?

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post #11 of 14 Old 06-04-2019, 09:10 AM
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you are trying to put too many potatoes in that bag. It won't be perfect but I doubt many theaters are.
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post #12 of 14 Old 06-04-2019, 09:23 AM
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what would happen if you laid the sub on it's side in the center of the stage and used it as a stand for a horizontal orientation of the center channel JTR. You would mitigate any width wise bass nulls. not sure of the effect on the center channel.
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post #13 of 14 Old 06-04-2019, 11:39 AM - Thread Starter
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what would happen if you laid the sub on it's side in the center of the stage and used it as a stand for a horizontal orientation of the center channel JTR. You would mitigate any width wise bass nulls. not sure of the effect on the center channel.
The long term plan was to get another sub for the other side but the wife would be happy if I didn't buy another one. Guess I can try it. Thanks for the help.
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post #14 of 14 Old 06-04-2019, 11:44 AM - Thread Starter
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Hmm maybe cut a hole in the wall so I can slide the sub back more but I have electrical behind it. I guess I should have used smaller speakers.

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