best 12" drivers

Tweeter or mid driver?

 

Have you actually started the cab yet?

 

A 12" tweeter would be pretty spectacular!

 

Will it include a tweeter/s and/or mid range driver/s in the design along with the 12's

Also
What amp are you going to use?
How big are your roadies?

 

1st, make it two 212s, not a 412.

With or without a HF, but without a dedicated mid, either Eminence 3012HOs or Faital 12PR300s. I'd lean Eminences.
http://usspeaker.com/kappalite3012ho-1.htm
http://usspeaker.com/faital pro 12pr300-1.htm

With a dedicated mid/mids & with/without HF, Eminence 3012LFs or Faital 12HP1010s. I'd lean Faitals.
http://usspeaker.com/kappalite3012lf-1.htm
http://usspeaker.com/faital pro 12hp1010-1.htm

 

What speakers are recommended in your plans? Good plans will tell you what to use and why. If they don't theyre not good plans.

+1.

 

Do you have any part of the cab designed or built yet?

 

If you already love the Mesa, why not get another? Then you have a modular 4x12 rig you know you'll enjoy at lower cost.

Not gonna try talking you out of doing a DIY custom design. It's a good learning experience.

 

Are you set on the 412 configuration?

 

With off the shelve drivers the best you can do is Bill Fitzmaurice horn loaded design or a Greenboy regular design.

Some top Manufacturers aren't going to use off the shelf, they're going to design the drivers for their own designs and get them built.
If money is no object, you can work with a speaker manufacturer to get your own drivers built.

 

You might introduce your dad to the Fearful cabinet designs. He may want to roll him own, but they'll give him something to think about. They use very high quality off the shelf speakers and so they give a lot of output compared to many commercial cabs

 

Faital 12PR300
Beyma 12LW30N

 

The Faital Pro 12PR300 that Avatar is selling for $109 is a good deal. (I wonder if they have stock spec's?)

 

^^^
Better than a good deal. I plan on employing 4 of them in a BFM Simplexx 2 x 212 build . But for a "price-is-no-object" build, not my 1st choice, that's all.

 

They are not what they seem, Only the "Magnet label" says Faital, it may look like a 12PR300 but they are falsely advertising these as the real thing.

"We bought the remaining stock of these fantastic Faital NEO 12PR300′s that were supplied to Genz Benz and have the GB part number Faital magnet label. 8 ohm only. "

I wouldn't expect they match 12PR300 stock drivers.
A good speaker build could buy some and measure them, then design a cab around them, but then that takes times, better buy the real market drivers over some surplus seller's word that they are the same.

 

Clear what you're saying, but the label also reads "12PR300."