So, about a week ago I picked myself up the aforementioned amp. 80 watts, 10-inch speaker with that funky slit down the middle. So far it suits my purposes, decently loud even if I decide to plug into the active input. After I got it though, I noticed that it's not really a combo. The amp and speaker are housed in the same casing, but the amp has a 4 ohm 1/4 jack in the back for other speakers. From that, I assume that I could remove the amp itself and attach it to another cab, right? Say if I'd like a bigger speaker size or something of the sort. Problem is, I don't know if it would be worthwhile to get a nice cab if the amp can't put enough power into it. Suggestions?