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In the Forum: Audio Discussions
In the Thread: The loudspeakers for a powerful SET
Post Subject: No Discounts!!!Posted by Paul S on: 4/17/2008
Well, FWIW, my Audax LF units started life at ~100 dB and wound up closer to 96 dB to get ~40 Hz from them via  ~ 4.75 cu. ft. BR boxes.  Computer tuning was very close, only a strip of rubber weatherstripping in the vent opening between best bass and typical BR "whoosh".

So, as a place to start:  FR ML2 = ~ 18 watts = 40 Hz from 4.75 cu. ft. BR box DEBZ+

Ironically, I suppose that the ML3s might drive something quite like the DEBZ - with slightly re-thought LF compromise - down to near 30 Hz, if you're looking for "discounts".

However, this would include the DEBZs' inherent dynamic limitations, which I suppose are below the big and multi-tower Wilsons, even though I have never heard the big Wilsons optimized.  I also assume that optimizing the big Wilsons (or any of their ilk, for that matter) to exploit/explore their dynamic limits would mean lots more power than even the ML3s can provide.

And so again:  To make greater dynamics than ML3 with hypothetical DEBZ++, then even higher efficiency drivers are required, and insertion losses would have to be lowered.  And I don't know of such drivers.

Re-thinking the DEBZ-ish design again, I think the un-Zobeled Lowther DX4 is about 99.5 dB.  IF Budification obviates the need for notch filters, as some insist, then paralleled/series 100 dB woofers might set up circa 99 dB in a "Super DEBZ++", and this MIGHT be OK with the same 97 dB Audaphon JP2 ribbon on top that my present DEBZ+s use.  This might actually work to get the thing closer to the very elusive SET/FR goal.

How's that?

And given the above, what exactly does the 99 dB LF section look/act like?  My limited experience with paralleled woofers was not at this level at all; we were just sticking them in big boxes and pouring power into them to make them loud, like cheap-o Meyer units.

Best regards,
Paul S

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