Hello everyone. I have been playing bass for a while, but am relatively new to utilizing an XLR out to the PA for live sound reinforcement when needed, and I know little to nothing about running a PA/mixer/board, and my bandmates, while very musically talented, know little more. I am running an Ampeg PF-500 with a GK 4x10. When I utilize the XLR out to the PA, the reinforcement over the PA is fine, but it mutes any output from the cab. However, if I mute the channel on the PA, the output from the cab is restored. My goal is to use the XLR out for some additional reinforcment when playing live but to still have output from the 4x10 as well. I have tried everything I can think of, so I figured I would ask all of you if there is something I am missing or if it is an equiment problem. Thanks for any suggestions or input, and thank you for the wealth of information everyone provides on these forums, I have learend a lot!