Eminence new em12, good alternative to a FRFR?

Looks like they're in the same ballpark as the EVM12L, in which case they'd probably sound decent for FRFR but not great - ultimately, they're still a guitar speaker even if they're toward the FRFR end of that spectrum.

As for hearing the same as FOH, I doubt it. If you're lucky it might sound pretty close to a normal amp on-stage and thus blend well with the house sound, but it's hard to say without actually trying them.

FRFR= full range flat response

The EM12 plays from 100 to 5.000 Hz. So NOT fullrange.
The frequency response is from 95 to 115 dB between those 100-5.000 Hz. So it´s very far from flat.

Don't forget to check out celestion or beyma (for higher end ones).

http://celestion.com/category/36/coaxialtwin_cone/

http://www.usspeaker.com/coaxial%20speakers-1.htm

These should make a nice coaxial speaker for guitar, though I would look into the recommended volume displacement for the speakers instead of just tossing them into any old empty cab. Pair it up with a DIY class d amp and it should work nicely. It wont be FRFR but I usually ended up cutting out the highs from my previous FRFR anyway. Would maybe want a speaker that goes a bit lower end of frequency range for 7-8 strings or drop tunings though. Some of the celestions go down to 50hz. you could also look up more speakers just search "coaxial guitar speaker" or similar.

Hey jero,

while a DIY FRFR cab can sound pleasantly, unless you really have balls as an audio designer most chances are your cab won't be FRFR at all. There's much more to it than just putting good loudspeakers into a case. The best demonstration is, every FRFR on the market has got its own sound, showing that every design is an approximation.
Having said this, there are several degrees of approximation, and many so called FRFR cabs sound crap.
It's exactly like putting an F1 engine into an F1 car frame and hoping to be competitive.

Basically, my advise would be: buy a good cab.

HTH

Hey Jero, For saving space, i have a standard 4x12 that is usable with my amp heads. Then i have a smaller box with a piezo horn that i put on top for when using it with the Kemper with cabs on. The horn's wiring jack puts it in series with the cab. My cab has the JH Greenbacks. No crossover. Pure luck. Sounds sooo good to me.

You could always combine two guitar speakers and two FR speakers in your 4x12, X-patterned, and then wire up two jacks on the back or a switch or whatever.

Or, a 2x12 guitar cab, and a FRFR cab for the Kemper.

Maybe you should take a look at this Mission Gemeni duo:

http://missionengineering.com/?product=gemini-duo