Hi, Sorry this is not a Bass question but a PA question. My guitar player runs his acoustic guitar directly through our board. He had a problem with the jack on his guitar and there was a lot of loud popping that came through the speakers. Now one of them has a bad buzzing sound when low frequencies are played through it. I am looking at investing in a new PA for the band but want to know if there is some sort of filter/noise gate the guitar player can run through to protect the system when he runs direct. Would a DI box prevent this? (He has since gotten his guitar repaired.) Thanks for any info.