What's the best mid-range driver available?


I'm thinking of trying the DIY route for a pair of full-range speakers. In your opinion, what is the BEST mid-range driver available and the best place to buy it?
Thanks for all your comments for the tweeter!
Thanks and happy listening!
myraj
Here is a link for the spec's on the ATC
http://web.archive.org/web/20010411204809/www.atc.gb.net/sm75-150.htm
ALE drivers from Japan are cost-no-object products. Their 7550DE lower midrange and 4550DE upper midrange compression drivers are approx. $2,500 each without horn. Their 1260 upper bass/lower midrange driver is $10,000 each. Adding an appropriate Tractrix horn (Sierra Brooks) could add another $2k each.

TAD's 4001 compression driver retails for $1,666 each and is no slouch either.

Both of these make the ATC look/feel like a small toy.
Hey Steve, did you sneak out or something ??? Good to see that they let you out of the Asylum for a change : )

Try using a pair or two of Quads ( or something very similar ) as midranges. Actively cross them with steep slopes and be done with it.

As to using horns, there is a lot to be said for their dynamics and ability to be easily driven. An amp that is coasting will always sound better than an amp that is being pushed. Sean
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