https://www.archdaily.com/935067/how-colors-change-the-perception-of-interior-spaces
I really like to think about this right before I paint my speakers flat white and forget about it.
The "black drivers floating in wall colored space" look can be pretty good too.
I really like to think about this right before I paint my speakers flat white and forget about it.
The "black drivers floating in wall colored space" look can be pretty good too.
Just a thought..
Do we need that big box behind the horn.. Obviously it will have some effect on directivity down low.. But still from the looks point of view..
Or something like this with each driver in its own separate 1.5 lire enclosure is fine (ignoring the colours for the moment 😀 )..
Do we need that big box behind the horn.. Obviously it will have some effect on directivity down low.. But still from the looks point of view..
Or something like this with each driver in its own separate 1.5 lire enclosure is fine (ignoring the colours for the moment 😀 )..
I like the Area 51 speakers as well. But that speaker was based on a 12inch woofer + MEH concept, I think..
Looked like a really good design, implemented well as a one-box solution.
The whole problem with my use case of this MEH that I am building is that I am trying to re-use the dual 15inch woofer module with the associated constraints/compromises in looks and performance..
I know it is unnecessary work when one thinks about what is possible and straight forward to do.. 😀
Make the MEH waveguide slightly wider (currently, it is 430mm in width including the "roundovers") and mate it to a good 18-inch woofer in a shallow depth closed box. Probably, even better is to put the whole thing in a shallower box with the 18inch woofer in passive cardioid configuration and the MEH mids also in passive cardioid/closed box configuration..
That way the whole struggle that I seem to have looks made up and could be avoided.. 😀
Or maybe this mix-and-match, suboptimal thing is part of the fun, I guess.. Maybe it helps us all think "out-of-the-box".. 🤓
Looked like a really good design, implemented well as a one-box solution.
The whole problem with my use case of this MEH that I am building is that I am trying to re-use the dual 15inch woofer module with the associated constraints/compromises in looks and performance..
I know it is unnecessary work when one thinks about what is possible and straight forward to do.. 😀
Make the MEH waveguide slightly wider (currently, it is 430mm in width including the "roundovers") and mate it to a good 18-inch woofer in a shallow depth closed box. Probably, even better is to put the whole thing in a shallower box with the 18inch woofer in passive cardioid configuration and the MEH mids also in passive cardioid/closed box configuration..
That way the whole struggle that I seem to have looks made up and could be avoided.. 😀
Or maybe this mix-and-match, suboptimal thing is part of the fun, I guess.. Maybe it helps us all think "out-of-the-box".. 🤓
Should the MEH have a cabinet? I think it should, not for aesthetics, but to better control the rear radiation and the resulting directivity. I would shape the directivity to be cardioid-like to better mate with the cardioid-like bass you originally planned. This means at least minimal walls to contain some absorption. If you leave it completely open, I think the rear radiation will be perceived as early reflections unless the speaker is placed well out from the walls. You could close the back completely but then you have front wall SBIR to deal with.
Let's take a design target of cardioid-like directivity down to 200 Hz for the MEH. The controlled rear radiation means that we don't depend on waveguide size for directivity control and can shrink it. Thus, we can have a tapered cabinet with bass supplied by a horizontally slot loaded (dual-opposed )15" woofer near the bottom of the cabinet.
I've done ABEC sims of 12" slot loaded that were clearly usable to 300 Hz. 15" to 200 Hz should not be a problem. Ideally, the MEH would be good down to 100 hz, allowing floor fired bass, but if cardioid in addition, it;s likely that some of the dynamics you are looking for would then be lost.
Here is a tapered cabinet with 15" at bottom, albeit dipole up top. I can imagine a horizontal slot at the widest point of the bottom cab. I can also imagine the bass cabinet being round, with an open slot on the front facing 180 degrees.
If you haven't already, you should take a look at the B&O website for possible inspiration.
H
Let's take a design target of cardioid-like directivity down to 200 Hz for the MEH. The controlled rear radiation means that we don't depend on waveguide size for directivity control and can shrink it. Thus, we can have a tapered cabinet with bass supplied by a horizontally slot loaded (dual-opposed )15" woofer near the bottom of the cabinet.
I've done ABEC sims of 12" slot loaded that were clearly usable to 300 Hz. 15" to 200 Hz should not be a problem. Ideally, the MEH would be good down to 100 hz, allowing floor fired bass, but if cardioid in addition, it;s likely that some of the dynamics you are looking for would then be lost.
Here is a tapered cabinet with 15" at bottom, albeit dipole up top. I can imagine a horizontal slot at the widest point of the bottom cab. I can also imagine the bass cabinet being round, with an open slot on the front facing 180 degrees.
If you haven't already, you should take a look at the B&O website for possible inspiration.
H
First I've heard of the weird TS params. Do you have any references? I have a pair new in box, 8 ohm. I was encouraged by Martin J King's results here: http://www.quarter-wave.com/Project13/Satori_TL_Design_Documentation.pdf
I was thinking I might use a pair of Wavecor tweeters I have that should be able to go lower than those Satori tweeters.
I'm a bit put off by some of the HD measurements I've found - I think I can cross the Wavecor at 1.1 but the HD is rising from 0.8 it seems. I suppose it may still be worth a try,
Anyway - I'm not up to TL cabinetry and I am concerned by ports, not least I have a ported speaker and it does fart - and its not so easy to redo the length. Adding or removing a bit of weight from passive radiator(s) is straightforward and non-destructive.
Before going to the bezier curve based edge termination experiment, here is waveguide I like 🙂
Device width x height = 360.51 x 298.82 mm (14.193 x 11.765")
Device length = 115.00 mm (4.528")
Enclosure is about 25cm deep with close to 4cm edge rounding
Device width x height = 360.51 x 298.82 mm (14.193 x 11.765")
Device length = 115.00 mm (4.528")
Enclosure is about 25cm deep with close to 4cm edge rounding
Created a 4cm waveguide termination using cubic bezier curve (probably not a surprising result)... Dimensions of the device are same as above.
Vertical polars with this one are less good-looking because of the absence of chamfers rounding on vertical edges (since I didn't know how to include this with a custom plan for enclosure in ATH)..
Anyway, here is a comparison with earlier 4cm rounding.. All responses are normalized w.r.t 20 degrees off axis
Rounding based waveguide termination
Cubic Bezier curve based termination
Vertical polars with this one are less good-looking because of the absence of chamfers rounding on vertical edges (since I didn't know how to include this with a custom plan for enclosure in ATH)..
Anyway, here is a comparison with earlier 4cm rounding.. All responses are normalized w.r.t 20 degrees off axis
Rounding based waveguide termination
Cubic Bezier curve based termination
disable verticals for DI calculation in vcad options and you can get a cleaner comparison for DI at least.
custom enclosure feature in ath does not provide top/bottom edge chamfering.
custom enclosure feature in ath does not provide top/bottom edge chamfering.
One more good looking waveguide with slightly smaller dimensions..
Device width x height = 346.46 x 287.46 mm (13.640 x 11.317")
Device length = 115.00 mm (4.528")
40mm roundovers on all sides 25cm depth to the box..
Device width x height = 346.46 x 287.46 mm (13.640 x 11.317")
Device length = 115.00 mm (4.528")
40mm roundovers on all sides 25cm depth to the box..
A tiny bit larger and deeper waveguide
Device width x height = 357.62 x 296.53 mm (14.080 x 11.674")
Device length = 118.00 mm (4.646")
Assuming the blips around 2.5 kHz are numerical issues...
Device width x height = 357.62 x 296.53 mm (14.080 x 11.674")
Device length = 118.00 mm (4.646")
Assuming the blips around 2.5 kHz are numerical issues...