Slight bit of necro-thread posting, but hey, it is my thread...
In another recent thread I posted about a 1x12 PRS Cab I got to use with my HXDA 30W Combo amp. I noted that the new 1x12 was rated for 60W, while my 1x12 that came with the Sweet 16 Head (both with matching Tuxedo tolex) was rated only for 30W according to the backplate, which seemed odd, since they supposedly both came with Celestion Vintage 30 speakers.
Side quest: why is a "Vintage 30" rated for 60 watts? Shouldn't that have been Vintage 60 then?
Answer, care of TGP quoting a book (bold my emphasis):
From "The History Of Marshall":
The well known Vintage 30 was introduced in 1986 after protestations from Marshall's Steve Grinrod that "ceramic speakers did not sound as good as Alnico speakers." Steve continues the story:
"The Vintage 30 was not intended to be (nor is) a G12H30, but rather a modern-day Alnico, and was originally intended purely for the Studio 15 (4001). The price and availability of cobalt [Alnico = Aluminum, Nickel, Cobalt] in 1985/86 was outrageous as a consequence of the Cold War; hence the use of a ceramic magnet.
"We found that the "H" magnet came closer to Alnico in terms of measurable performance, and a new coil assembly was designed using modern materials having similar mass and physical properties to the Alnico 15 watt, but with a much higher flammmability rating; hence the Vintage 30's 70 watt power handling."
"Unfortunately, the original cone was not available, so we used the next nearest and added some quite severe doping. The result was a very fine loudspeaker, not quite but very close to the sound of an Alnico, with a fatter midrange. And since it's release date coincided with increased demand for classic loudspeakers such as the G12H30, it was marketed by Celestion as the "Vintage 30", which was where all the confusion came in."
Anyway:
Every description/review of the Sweet 16 cab says Celestion Vintage 30, if it specifies anything. The Reverb listing when I bought it said Vintage 30, probably because that is what all the reviews said.
So I opened it up.
It is a Celestion G12H (70th anniv edition), 30W, not a Vintage 30. Which is interesting because the Sweet 16 Combo amp came with a G12H30.
OK, that explains the rating on the back of the cab. But why does every review/description say it should have been a V30? Did PRS offer two different Tuxedo 1x12s for the Sweet 16, one with a V30 rated at 60W, one rated at 30W because it had a G12H30?
I like the idea of the speaker having a rating not too far from the amp's nominal max power, which is 16W in this case. The 60W cab might have sounded just too refined, because no speaker cone breakup would ever occur.
And finally, one more twist. The G12H30 speaker is marked as "6 ohm". Celestion specs say the 8 ohm G12H have 6.1 ohm DC resistance. And that is about what I measure (5.9 in my case).
But the back plate of the cabinet itself says 16 ohm, and that is how I have the amp set.
I wonder if someone swapped speakers in this cab at some point? Or does PRS think it is OK running the cab as "16 ohms"?
@Shawn@PRS , do you have any info? SN of the cab is 090154 if PRS has records of such things?
I'm going to switch the amp to 8 ohm mode for now, just in case. But I've been using it in 16 ohm mode for a few years, obviously.
Seriously, I’ve played in working bands for YEARS and can still get butterflies playing privately in front of people. But playing with a bunch of forum buddies can make you forget that phobia. No bigger grin can be plastered on your face. Oh, and if it makes you feel any better, my cats scatter as soon as I flip the power switch on the amp. They know to take sonic cover. 
