Hey all. So got a request to do a custom build for a client/friend who just purchased an 85” flat screen to use as the center of thier combined living/media space. Their desire is for minimalism and symmetry and no center channel!!!…..other than that, I have free reign.
I would have gone in wall for sure until seeing the space and the wall is brick! So much for that! 💩
Well….on wall it will be and I’ve just finished some prelim and came up with a shallow on wall sealed line source for on either side of the screen.
We’ll use 10 Dayton ND 91’s for this 5 groups of two with each group wired in series and all 5 wired in parallel. For tweeters, we’ll use 20 of the Dayton ND20FB domes. I’m not sure how low I can go with 20 of these and not hit any audible distortion on dynamic peaks though…..ideally a 2k cross would nearly eliminate most lobing but only measuring will tell. Off axis response is as good as it gets out to 10k and with the ND woofers, I’m looking at a prelim of 80hz-12khz at flat out to +/-45 degrees so this ’might’ just work out for a phantom center system with just a wee bit of tow in….maybe a baffle angled inwards 5 degrees or so.
The plan is for these to butt up right against the edge of the screen so the screen will act as a continuation of the baffle reducing diffraction and aiding in baffle step. The little ND tweeters if placed inboard should handle the job……the needed low crossover for a true line source is the head ache….the distance between the woofers dictates a cross at no more than 2k to really sum up.
Sub woofage will be handled by an existing pair of Klipsch 12’s they already have placed in the two front corners and the Klipsch on wall surrounds will save……both the center and horn loaded Klipsch towers go bye bye along with the entertainment center the TV sits on……it will go to a wall mount.
So for those that see anything with the driver or design choices I’ve Made, feel free. Depth of the speaker is constrained to 5” which is equal to the TV profile mounted on the wall. Width?…..well….the minimalist thing kinda dictates the obvious……for visual balance, I’m thinking 8” wide max……that will give me enough internal volume sealed to hit a target F3 of 70hz and enough out board baffle to chamfer to meet the wall while minimalizing diffraction…..I hope.
I would have gone in wall for sure until seeing the space and the wall is brick! So much for that! 💩
Well….on wall it will be and I’ve just finished some prelim and came up with a shallow on wall sealed line source for on either side of the screen.
We’ll use 10 Dayton ND 91’s for this 5 groups of two with each group wired in series and all 5 wired in parallel. For tweeters, we’ll use 20 of the Dayton ND20FB domes. I’m not sure how low I can go with 20 of these and not hit any audible distortion on dynamic peaks though…..ideally a 2k cross would nearly eliminate most lobing but only measuring will tell. Off axis response is as good as it gets out to 10k and with the ND woofers, I’m looking at a prelim of 80hz-12khz at flat out to +/-45 degrees so this ’might’ just work out for a phantom center system with just a wee bit of tow in….maybe a baffle angled inwards 5 degrees or so.
The plan is for these to butt up right against the edge of the screen so the screen will act as a continuation of the baffle reducing diffraction and aiding in baffle step. The little ND tweeters if placed inboard should handle the job……the needed low crossover for a true line source is the head ache….the distance between the woofers dictates a cross at no more than 2k to really sum up.
Sub woofage will be handled by an existing pair of Klipsch 12’s they already have placed in the two front corners and the Klipsch on wall surrounds will save……both the center and horn loaded Klipsch towers go bye bye along with the entertainment center the TV sits on……it will go to a wall mount.
So for those that see anything with the driver or design choices I’ve Made, feel free. Depth of the speaker is constrained to 5” which is equal to the TV profile mounted on the wall. Width?…..well….the minimalist thing kinda dictates the obvious……for visual balance, I’m thinking 8” wide max……that will give me enough internal volume sealed to hit a target F3 of 70hz and enough out board baffle to chamfer to meet the wall while minimalizing diffraction…..I hope.
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