line out/ PA/ Extension Speaker

I don't think so - jack plugs are usually noted as unbalanced (rather like me).

I'm pretty certain that balanced plugs are XLRs.

The thing with using a line out (balanced or otherwise) is that you bypass the speaker and, therefore, the "colour" and presence it gives your sound.

To be more specific, the Ext Speaker connection is a high-voltage signal intended to drive another speaker cab. This should NOT be connected to a mixer input.

However, using LineOut is a very good method for bass and keyboards and undistorted guitars.

As GB points out, when you grab the LineOut (balanced or not) you bypass the output amp and speaker. If you're playing at low levels and/or mostly clean, this shouldn't make a big difference. If you depend on the overdrive from the amp for distortion (not the pre-gain, but the post-gain or master volume), then you won't like this.

-Laz

Thanks. I thought that might be the case.
It looks like miking is the best thing for me then.

Tim

We're playing a gig Thursday and have typically miked the amps into the PA. On Thursday, the guys running the sound suggested running from the "balanced line out" jacks directly into the PA.

I don't see a "balanced line out" jack on my amp, but it does have an "extension speaker" jack. Are these the same thing?

Thanks,
Tim

Don't even think of running a speaker out into a PA unless it belongs to someone you absolutely hate. That output comes from the power amp, and will likely blow whatever channel of the PA it's plugged into. Use it for speaker cabs only

Well, in the end, he did run the line from my extension output directly into the PA. I shared the comments all of you made, but he said the PA could handle a 300w input and my amp is 120w. It's a solid state amp, so the distortion is all preamp modeling and carried through fine on the solo I played distorted. (I was playing clean the rest of the evening). At any rate, it worked fine, though I was a bit anxious about it. It seems like you need a degree in physics to run sound though!
Tim