The stock speaker is farting out a bunch. I don't really have the money for a new speaker at the moment but I do have a brand new greenback in my Silvertone cab that isn't being used (it also has a brand new 65 watt Scumback but that is too efficient for this amp) so I dropped the Greenback in this afternoon. It works, but its pretty un inspiring. I'm taking it to teach with tonight and maybe the speaker will break in a bit.