Tony,

Here is some advice I gave a fellow eConcert musician yesterday:

I do not use and amp, I wire right into my Alesis 4 Channel as follows:

Mic in to Mixer

Instrument in to Mixer

USB from mixer to 2nd computer which is connected to the eConcert broadcaster (in this case SJ)

You can also adjust sound volume etc. on the Jellycaster.

Mixer Out to mains or headphones (either or both) and that is it.

Best bet is as mentioned above, get someone who's ears you trust to listen to your sound check.

Let me know if I can help.

Break A Leg!

Danny C.