These are the other half of the vintage 30. Basically, when you buy a cab without caring what speakers you get in'em, if they're not vintage 30s, you'll most likely get these. The G12T-75s have been around for quite some time, probably longer than the vintage 30 and they have a very different character to them. They're bright, quite bright. This is not to say that they sound bad! I believe every guitar speaker is usable in some context. The G12T-75 to me is a brighter speaker and would most likely suit straight cabs as such. I've found slant styled cabs to always, always be brighter and if you add an even brighter speaker in the mix you're doomed! However, I've never actually been a big fan of the angled cabs anyhow, they've always seemed to be mis-projecting the proper sound of the cab and guitar sound to me.

Anyhow, back to this speaker, it's definitely brighter and I think would sound great for downtuned guitars to keep the tone tight and not too flubby. It's also got enough headroom so early speaker distortion is nothing to be worried about, unless you want something of that sort, then you may want to try another speaker. This is still, however a great speaker even for standard tuning if you EQ the amp right. I’ve found these speakers to be just as good, but different sounding from the vintage 30s, again brighter, more presence and high end sparkle and not so much of that midrange girth you’d find in a vintage 30. I do like the sound of both speakers and have seen others mix and match both the vintage 30 and 75 to get a very good balanced sound. I have yet to personally try this myself but it definitely does sound good on paper.