I have a Fender-style open-back cab. It's custom-made so the dimensions aren't conventional. It's a little taller and a little narrower than a Princeton cab but the depth is the same. When I compare it with a Princeton I have it lacks bass and punch. I've even tried it with the same RW&B and it definitely seems like a cab issue. So I'm thinking about putting a larger lower back panel on it to see if that increases the bass response. Not entirely closed but leaving a smaller space between the lower panel and the top one. Think it will work?