Size of Midrange Drivers

The largest cone midrange I can find is in the Tannoy "Kingdome Royal" speaker.
It uses a "12in Dual ConcentricTM drive unit" with a tweeter in its center.
Now we're talking (where did I put that Tool CD?"!

Kijanki,

Do you know who makes good ferrofluid suspended drivers like the ones in you Hyperions - or better yet, the ones found on your speakers? I'd like to learn more for a DIY project.

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FWIW, back in the "slopped baffle" thread Roy Johnson from Green Mountain Audio made several points about driver size and selection. He mentioned he used a 4.5" midrange driver for his Calypso as it was designed to work in living rooms and audio rooms, but he used larger drivers when designing speakers for vary large rooms. So I wonder how much of a concern is beaming for him, as it would seem the detrimental effect of beaming would be more notorious the larger the room.

Good thread!

As well as bombaywalla tried to explain it, I think dweller is still confused.

Shakey

Have a loudspeaker that I'm working on with 14ft long horn 43x62in bell 4in compression driver used as a mid range.

Johnk..... I betcha that wherever that baby beams it smacks you in the head.
Really though, we're off of the ops topic, but what we have been discussing about cone drivers is the where the driver starts losing dispersion characteristics. I kinda eluted to that in my snide question. Once the width of dispersion starts decreasing, we hear the beaming effect... Yes, I'm sure that is known, but just wanted to clarify for others.
There are ways around the beaming effect.. Ohm fires off the back side of their cone... Bose uses direct reflecting technology... both have their own issues. Mainly, any decent designer will properly work around the individual drivers problems do a fair degree. There are trade off on any speaker... period. Frequency extention capabilities, driver peaks or dips, excursion limits, Impedance/phase dips, etc, etc, etc.