Thanks to everyone who has replied to my earlier ones. So I did buy one of these off eBay, and I've discovered that it's not as impressive as people said, although it's better than a handful of other small SS practice amps I've had, like a Crate GX-25M (which wasn't half bad) and a little Kustom one-tuber with SS guts. This Marshall gets too distorted past about 5 on the gain channel. And it's not as loud as advertised on the clean channel. (One reviewer said it's loud enough for little bar gigs; is this even possible in a 12-watt SS amp?) Plus, it gets real woofy when I do turn it up. Anyhow, assuming the electronics are fine, would it be worth spending some money on a new speaker? I mentioned this to Ted Weber and he recommended his Alnico Blue Pup. But it's $95 -- what I paid for the amp itself. Stock speaker is a Celestion G10-20, 10". Is this a good speaker? Is it worth trying a swap to get a tighter bass and more headroom while preserving this amp's virtue of offering "that Marshall tone" in a tiny package? Got any recommendations that don't cost $95? Or would the Weber truly be an improvement? Amp's 20 years old: could the current speaker just be worn out?