ideas for widebander?

[bassrogue]

I have heard the SP12B. A friend has owned a pair since the late 1960s. I have never had the chance to hear then side by side with the Beta 12 though. I'd pick the EV as the better driver of the two, but at a much higher price if you can find a good pair.
The tweeter I'm using with the Beta 12 is an old Pyle PA horn (maybe a H391) I've owned them for years but never tried them until a couple of months ago. They have plenty of output without being harsh sounding, at least to my ears. I put these drivers in Harderror's SPQR EZ10 horn. I have only listened to them for an hour so far but my first impression is they may replace my Fostex 206esr on my main system.