Re: Amp Speakers?
I own a Classic 30 (the 30 watt 1x12 version of your amp)
I have two speakers wired in the cab individually, a Celestion g12h and a Jensen c12n. (one to the speaker wires and one the to ext. speaker jack)
I absolutely love the celestion. It's a very warm sounding speaker, it's got loads of bottom end, nice smooth highs and warm low mids. The problem with it is, it's great at moderate volumes, but with my amp driven hard it gets wayy too bassy and muddy on its own. To solve this I add in the Jensen at higher volumes. The jensen is an extremely bright, sparkly speaker. It's got loads of mids, not a lot of bottom end, and tighter highs. This makes it a really good partner for the Celestion.
Look into different brands and models of speakers, and if your replacing all four, consider mixing and matching. You'll cover a much wider range.