Just wondering what the overall feeling about whether to use a completely closed back cab vs. a ported back one..... and using a cab with a tweeter vs. a non tweeter cab? Im using (2) GK 410 cabs, completely closed...no tweeters. I like the tone overall, but they seem to lack the "punch" at full power that I would expect them to have. I asked my bass tech about this and about maybe switching to tweetered cabs and for some reason I received a 20 minute tantrum about how he hates tweetered cabs? Thanks!