Or not. - Bill Fitzmaurice - Tweakers' Asylum

Tweakers' Asylum

Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.

Or not.

Bill Fitzmaurice

In Reply to: You are confused. posted by Jon Risch on April 20, 2004 at 18:52:56:

Whiole I don't disagree in total the fact remains that the effects of edge diffraction and the baffle step frequency are inexorably intertwined. It's no coincidence that in enclosures of typical dimensions edge diffractive effects above the frequency of the baffle step, 2kHz on average, tend to run on the order of 2dB or less, while below the step frequency glitches of 4dB and more are common.
While rounding of the cabinet edges can be beneficial as far as HF diffraction is concerned, it's no panacea, as many of the same studies you mention note that the nearby presence of the mid-bass driver(s) cause far more diffractive effects than the baffle edge, effects that cannot be significantly ameliorated shy of mounting the tweeter separately of the mid-bass baffle.
There is also the contention that the most effective method of limiting HF diffraction is the relocation of the tweeter to an off-center position, and that the benefits of so doing render additional efforts via edge rounding to be rather insignificant by comparison.
This is not to say that large radius edge rounding has no benefit with respect to frequencies above the baffle step, just that the benefits so gained are going to be minimal, while below the baffle step frequency far greater benefits will be obtained.

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Follow Ups Full Thread

Topic - Do you remember the company ? - Dholai 07:22:38 04/17/04 (13)

Madisound - Payne Hertz 09:33:18 04/17/04 (9)

Not just non-flush mount.... - Jon Risch 15:09:52 04/18/04 (8)

At what radius .... - NewbieBaby 09:45:14 04/19/04 (7)

Re: At what radius .... - Jon Risch 10:41:37 04/19/04 (6)

Keep in mind the cabinet width vs. tweeter bandwidth. - Bill Fitzmaurice 14:48:50 04/19/04 (5)

?????? - Jon Risch 18:24:52 04/19/04 (4)

Confused? Not me. - Bill Fitzmaurice 13:06:13 04/20/04 (3)

You are confused. - Jon Risch 18:52:56 04/20/04 (2)

Or not. - Bill Fitzmaurice 04/21/0406:08:18 04/21/04 (1)

Re: Or not. - Jon Risch 22:29:19 04/21/04 (0)

Re: Do you remember the company ? - markC 08:56:42 04/17/04 (0)

Go to your local hardware store. - Bill Fitzmaurice 07:46:41 04/17/04 (1)

Re: Go to your local hardware store. - Dholai 11:13:20 04/17/04 (0)

Follow Ups

Or not. - Bill Fitzmaurice 04/21/0406:08:18 04/21/04 (1)

Re: Or not. - Jon Risch 22:29:19 04/21/04 (0)

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