Speaker cabinets and edge diffraction

[graaf]

The diffraction concern is largely moot with that configuration, with the exception of baffle step.

yes, it looks pretty close to diffraction perfect ie. spherical enclosure, doesn't it? 🙂

The issues with that arrangement aren't applicable to the topic here, in my opinion.

If you consider a single one of those in isolation, they are not close to point source. No driver is.
Dave

"pretty close" is what I said 😀

no piston driver that I know of is significantly closer to a point source 🙂

Actually that they become somewhat directional in the two highest octaves is good from the point of diffraction - when the speaker density parameter is set to 2 instead of 1 then the curve becomes even smoother

 

[dlr]

All that means is that you've created a directional source, so with regard to diffraction, vis-a-vis roundovers, it's moot. It's not that it acts like or is equivalent to a sphere, it's that the source does not interact significantly with the boundary. And that multitude of drivers is going to have significant off-axis interference effects unrelated to the baffle. As I said, the issues with that arrangement aren't applicable to the topic here.

If you want to test the influence of the baffle, use a single source that is typical. Use a 25mm or 33mm tweeter alone. Then you'll see how the baffle can influence it. Your example shows little other than what happens with a highly directional source.

Dave

 

[badman]

Your example shows little other than what happens with a highly directional source.

Dave

Aw c'mon Mr. Grumpy Pants!

Having a wide variance in distance to boundaries is a noble effort- even if it's done with a wacky driver array 🙂

 

[graaf]

Aw c'mon Mr. Grumpy Pants!

Having a wide variance in distance to boundaries is a noble effort- even if it's done with a wacky driver array 🙂

thank You ever so! 😉 😀

it seems that diffraction effects are very difficult to cure

and it's either they affect the sound in an audible way detrimental to the quality of it or not

in other words EITHER they create frequency domain issues - then in a typical monopole speaker these are basically non-issues as it is easy to keep the ripples within +/-2 dB (in a two way speaker even without any asymmetric driver placement) and there is not much to talk about (or is it?) OR they create time domain issues - and then only high directivity can help - which means a big waveguide is needed plus rounded edges or ...a WDA (a wacky driver array) 🙂 I like the name 😀

that multitude of drivers is going to have significant off-axis interference effects unrelated to the baffle. As I said, the issues with that arrangement aren't applicable to the topic here.

I wonder what are those issues exactly? Besides that it is one listener and a head clamp idea

I do not want to hijack the thread, guide me please to where the issues are discussed

 

[AllenB]

in other words EITHER they create frequency domain issues <snip> OR they create time domain issues

More likely both at once. An artefact isn't likely to be coming from the same direction, time or space as the source.