I run a Fender Super Bassman and the Fender 610 Neo cab. I know this cab is front ported so I can't figure out why I have god awful amounts of loud boomy bass behind the cab. It was never an issue when I was using small amps and DI. But I'm addicted to the feel of big iron bass amps now. Gotta figure it out. I always go out from with my wireless and dial everything in for the room so I know its not boomy all over the club, sounds fantastic out front, get compliments often on the sound. Just back there where the drummer sits its brutally boomy. Months back a high pass filter was suggested. I did try that but did nothing for the backwash of bass. It bugs me. I on occasion visit a blues jam where the house cab is an Ampeg 810. Its not a large bar and the cab is right up against the wall in a corner with the drums and sits on a wooden riser. No boom issue at all. No issues with the sound bleeding off to the sides and back killing everyone towards the rear of the stage. Its really become an issue. I've had drummers get seriously pissed over it. I'm considering picking up a cheap used Ampeg 810 to see if a matter of ported vs closed cab. I want my sound out front not killing pounding the drummer with dubby boom noise. I really not sure what to do about it.