#1
So I had this cheap Johnson 15W amp and was jamming with my brother...he played drums and I played guitar. Anyway, in order to hear me, I had to turn my amp all the way up and we played for an hour or two.

Now, when I play a low G...or like the 2-5 frets on the low E string, my amp makes kind of a low rattling noise at any volume, but is okay at higher pitches. Did I blow out my speaker?

I have another amp, so it's not a big deal...but I would like to have stereo sound (my effects pedal supports stereo output). Would it be possible to just replace the speaker? And is that easy to do?
#3
checked for tears and didn't see any. so, i just tightened all the screws and at least for now, it sounds just fine. is this good? or do you think this is just a temporary fix?