I have a bandmate with a Guild acoustic/electric. I run sound on this guitar direct through the board. I can’t get a loud enough volume on this instrument without setting the channel gain high(a lot past unity). This is with the guitar’s volume control and channel slider nearly maxed. The volume output level at this point is just ok. Any increase in channel gain to mix the sound properly results in signal breakup. I believe there to be a problem with the under saddle pickup as I do not think these settings should need to be so high. We have tried using a direct box and have had the same results. Any thoughts would be appreciated.