Not bad 😉. It's written from a placement perspective. It's probably not placed to enlighten on DIY in-wall design.
No you are right.
But i don't know the level of knowledge of OP, and we introduced inwall as he seemed interested into a more usual setup so don't want to confuse anyone for now.
As both are linked understanding placement trade off will give perspective on corrections to be applied imho.
But i don't know the level of knowledge of OP, and we introduced inwall as he seemed interested into a more usual setup so don't want to confuse anyone for now.
As both are linked understanding placement trade off will give perspective on corrections to be applied imho.
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Starting with 3D; note I said 'ideally' and while I hand drew them same as an architect, today you'd do the measurements, harmonic locations calcs for each boundary [wall, floor, etc.] in width x height and load it in SketchUp or similar to rotate/view it in 3D.
That said, simply plot each wall's harmonics on ~transparent Vellum and overlay them to see how they line up: https://www.amazon.com/Sheets-Pack-Vellum-Paper-Value/dp/B06Y24GZPG
At this point you'd try to put the speakers and listening position [LP] at an odd harmonic in 3D, which usually means you'd wind up putting the LP at some average point of the three crisscrossing lines as just one example.
The strongest harmonic is of course the fundamental [1st odd harmonic], so this will be at/in a wall with its wide/deep null at the center of the room [L/2], the too often [and worst] place to put the LP unless the speakers are at an even harmonic also, which is where we come into the speaker/wall spacing concerns that start at the first even harmonic [L/5], then L/[2/5]. If at/in the wall, then we want the LP at L/3, L/[2/3] or at the other wall. Of course these can be further broken down into smaller fractions as required, but ideally want to keep it simple using the first few modes since the room dominates down low.
All this now ideally needs to be done in the other planes to figure best overall locations and this includes woofers, so as I already pointed out the WMTMW isn't a good plan unless the bottom woofer is down near the floor and the top one at L/3 assuming that the LP is at an odd harmonic. If at an even harmonic, then the bottom woofer shifts to L/5, the top at L/[2/5] or L/[3/5].
Note that it's a good plan to offset the speaker/LP 'triangle' to randomize all these incredible number of reflections that can otherwise sum at the LP and better still to rotate it a bit to ~completely randomize it if a simple square/rectangular box layout such as a corner of a basement.
If these considerations aren't an option, then recommend the W or WWMTM.
I've never been a fan of these type towers unless focused [curved] to render these vertical modes moot, so never checked to see if there was any of them that had a relation to a typical ~8 ft ceiling, though assume they're done strictly by multi-driver spacing requirements.
Frankly, I don't 'get' this 'business' of spacing speakers out in the room unless no choice since no matter what type of speaker I've built for myself it was designed to be put at/in a wall or corner as well as for many others when there was room. Once away from here it usually requires some type of baffle step loss [BSC] compensation, reducing system efficiency and increasing XO cost, so were made wide enough to not need it [~26" - 36" with the vast majority at the pioneer's 30"] depending on the app.
In short, I personally would never recommend any speaker design that 'demands' being out in the room unless they had no usable wall locations.
That said, simply plot each wall's harmonics on ~transparent Vellum and overlay them to see how they line up: https://www.amazon.com/Sheets-Pack-Vellum-Paper-Value/dp/B06Y24GZPG
At this point you'd try to put the speakers and listening position [LP] at an odd harmonic in 3D, which usually means you'd wind up putting the LP at some average point of the three crisscrossing lines as just one example.
The strongest harmonic is of course the fundamental [1st odd harmonic], so this will be at/in a wall with its wide/deep null at the center of the room [L/2], the too often [and worst] place to put the LP unless the speakers are at an even harmonic also, which is where we come into the speaker/wall spacing concerns that start at the first even harmonic [L/5], then L/[2/5]. If at/in the wall, then we want the LP at L/3, L/[2/3] or at the other wall. Of course these can be further broken down into smaller fractions as required, but ideally want to keep it simple using the first few modes since the room dominates down low.
All this now ideally needs to be done in the other planes to figure best overall locations and this includes woofers, so as I already pointed out the WMTMW isn't a good plan unless the bottom woofer is down near the floor and the top one at L/3 assuming that the LP is at an odd harmonic. If at an even harmonic, then the bottom woofer shifts to L/5, the top at L/[2/5] or L/[3/5].
Note that it's a good plan to offset the speaker/LP 'triangle' to randomize all these incredible number of reflections that can otherwise sum at the LP and better still to rotate it a bit to ~completely randomize it if a simple square/rectangular box layout such as a corner of a basement.
If these considerations aren't an option, then recommend the W or WWMTM.
I've never been a fan of these type towers unless focused [curved] to render these vertical modes moot, so never checked to see if there was any of them that had a relation to a typical ~8 ft ceiling, though assume they're done strictly by multi-driver spacing requirements.
Frankly, I don't 'get' this 'business' of spacing speakers out in the room unless no choice since no matter what type of speaker I've built for myself it was designed to be put at/in a wall or corner as well as for many others when there was room. Once away from here it usually requires some type of baffle step loss [BSC] compensation, reducing system efficiency and increasing XO cost, so were made wide enough to not need it [~26" - 36" with the vast majority at the pioneer's 30"] depending on the app.
In short, I personally would never recommend any speaker design that 'demands' being out in the room unless they had no usable wall locations.
That last one is a good ‘advice’
Since the room isn’t rectangular enough simple first order geometrics that deny tangential and oblique, cavities as staircases and less than solid walls (windows) won’t do here. Measuring the problems and eq-ing the peaks would give far better results.
Since the room isn’t rectangular enough simple first order geometrics that deny tangential and oblique, cavities as staircases and less than solid walls (windows) won’t do here. Measuring the problems and eq-ing the peaks would give far better results.