Re: Alnico speakers vs regular speakers
The P12R has a small 1" voice coil and small alnico horseshoe magnet...it's sort of a 12" version of the P10R.
The P12N has a large 1 3/4" voice coil and huge alnico magnet.
The P12Q is between the two but alot nicer than the P12R which I think gets kind of farty sounding when pushed hard.
Larger voice coil and larger magnet = better tone, more output, more efficiency, tighter/deeper bass and 2 watts through a large voice coil and large magnet will be louder than 2 watts through a speaker with a smaller voice coil and smaller magnet.
As far as 10" speakers go, my favorites are made by Ted Weber. I'm not as taken by Ted's 12's as I am his 10's, but his 10's are great. The three I like best are the P10RT (very similar to the original '59 Jensen P10R), the C10Q (very similar to the original '66 Jensen C10N) and the 30 watt version of the P10Q (great in blackface Fenders like the Super Reverb)
Ted's version of the C10N sounds less like a real '66 Jensen C10N than the Weber C10Q does! The Weber C10Q uses a big C10N style magnet...not the smaller magnet the original Jensen C10Q used.
He has new numbers for all of those speakers but if you ask Ted or TA what the new numbers for the P10RT, P10Q 30 watt and C10Q are they'll set you straight.
Compared to the Weber 10's I mentioned, the Celestion Vintage 10 is nothing special...I didn't like it much at all.
Lew