I just ordered a new Fender Rumble 100 that I'm planning on using for an upcoming show(actually my band's first really big show). Anway, I figure the amp itself isn't going to be quite loud enough so I'll have to plug into the PA. I've had some people tell me I'll need to mike it, but I was wondering if I can just use the XLR output or something like that and still be able to use the amp as a monitor for myself. The reason I'm asking is the last time I used an XLR output for a bass amp, it muted the speakers in the amp itself. Also, what exactly does the preamp out do or how can it be used. I'm really just wondering how I can run my amp to the PA without having to mike it. I'm sorta a newbie here so thanks for your help.