Re: polk 6x9

John Durbin wrote:
No, it wasn't. Go back and read your posts... the one that said they could be made was me. You were busy riding MOSFET's bandwagon that they sucked bcause nobody uses them.

You mean where I said:
"Whether it's for SQ reasons, engineering reasons, budgetary reasons, or otherwise, those who actually produce the speakers obviously don't see a major benefit to the oval style, or we'd see a lot more of them. This doesn't necessarily suggest that it's a BAD design... only that it's not particularly advantageous. I expect every manufacturer has their own reasons why they feel that's so."

It costs no more to do the FEA for an oval design than a round one. Tooling may or may not be more depending on type & size etc.

You just admitted that there are greater engineering concerns, including the ones I've been claiming all along, and outlined several methods that might be used to counteract that.

Now you're contradicting yourself as well as everyone else.

And you still haven't listed any of your marvelous speaker-design books despite accusing me of doing the same thing.

Would you like some condiments for your other foot?


JD

Matt Ion wrote:

John Durbin wrote:

I am sure the typical distortions of the oval drivers of those days were enough to push them towards round cone designs. If they had the design tools & manufacturing processes currently available that might not have happened or might not have happened as thoroughly. Today an engineer can use FEA tools to predict & control cone flexing, surface distortions, etc. The cone can be injected with varying thicknesses as needed to support the design, shapes can be created that allow the designer to dictate dispersion patterns in the midrange frequencies, etc. Lots of different ways to address what you guys are talking about.


Which was precisely my original assertion: yes, good-sounding oval speakers CAN be made, but there are too many design, engineering, and therefore related cost issues to make it worthwhile in most designs.

.

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