the 'sound' of grill supports, & box edges.

[Jody]

Ok, ok so the hi fi world has probably known about this for ages, but i've just had my mind blown by the difference in sound when all edges (for grills & accoustifoam to sit in) are removed. I thought there might be a small difference, but, BLIMEY, the difference is huge.
whats going on?

speaker in question is a 6" and a ribbon driver, which has very wide horizontal dispersion, but the main difference was arround the low mid region, sounding as if it'd turned inside out with edges on. is it the same for all types of driver?

[Zilch]

Read up in Dickason's "Loudspeaker Design Cookbook."

Edge diffraction.

[JBL 4645]

Edge Diffraction
http://www.speakerdesign.net/understand.html

I’ve been looking around Google with keywords like “Edge diffraction THX” I see that “(4-pi) to half-space (2-pi)” was mentioned in the article that I posted and I seem to remember thinking back to what Tomlinson Holman mentioning about the same thing.

http://www.silcom.com/~aludwig/Loudspeaker_construction.html (http://www.silcom.com/~aludwig/Loudspeaker_construction.html)

http://www.rawsound.com/articles/THX2/index.html

[Jody]

Huge thankyou jbl.
much reading to do, back in a bit:)
hope you don't mind me asking all these questions.
I'll be chopping all the fronts off me speakers soon:eek:
how to protect the cones though??
go horn loaded? a friend just made some tractrix-ish horns out of lycra & f.glass. wooden horns maybe
:offtopic:

later!

[toddalin]

Edge diffractions don't only occur at the speaker.

I find that when I'm seriously listening to music, I can hear the differences due to differaction caused by my glasses, so I take them off. There is a noticable difference.

[JBL 4645]

Edge diffractions don't only occur at the speaker.

I find that when I'm seriously listening to music, I can hear the differences due to differaction caused by my glasses, so I take them off. There is a noticable difference.

That’s an interesting observation has they will just stand out over the front of the face depending on the shape and size.

But wouldn’t it be easy to install the loudspeakers into a baffle wall.