I picked up one of these little amps in a bundle deal last week and have been fairly impressed with it, and I'm not a fan of small amps at all. It's got a little 8 inch speaker and as such it sounds....like an 8 inch speaker. I can squeeze a 10" one in there, any suggestions? I have an older Celestion 12" but it just won't fit. Not looking to spend a ton of money, I just play it outside on the deck.