Thanks for all the replies! It really means a lot to me.
I'll try this when I get home and my roommates aren't asleep but what do you mean by "mixer block volumes?" I'm aware of the master volume and the preset volume knobs, but I'm not sure what you are referring to. FYI, I'm plugging straight into my Alto from my HD500X with a 1/4" cable.
This gives me a lot of hope. I wonder if there may be something wrong with my speaker? It was refurbished but I was made aware that it would be in total working order and it looks like it's in great condition. Also, maybe I'm wrong on this, but I thought that the signal limiter that my Alto was showing meant that was its maximum output? Would that not mean that increasing the volume on the pedal and lowering the volume on the speaker would have the same effect? I may be completely wrong on this. If so, what does the limiter actually mean?
I'm using 1/4" outputs and have that switch set to line. Thanks for checking, though.