I have quite a few interesting and vintage 12" speakers that need a home (a cabinet to live in). I recently picked up a used 2x12 slant cabinet for cheap money on CL. It is closed back but has two round ports on the front - no length to the port (no tubing - just holes in the baffle board). Right now I have two EVM12L in there. I have various old Jenson, Rolla, Celestion 12" I've salvaged over the years. I think it sounds pretty good but I'm new to the whole guitar thing (long time musician - just new to guitar) so I don't really play well enough, yet, to know what a good sounding guitar cabinet sounds like. I occasionally see inexpensive closed back (no ports) 2x12 cabs on CL or an Open back (fender type) 2x12 cab on CL and I'm sort of tempted to buy one of each just so I can see what the difference is (and to give a home to some of these raw speakers I have lying about). Anyway ... hoping some of you might be able to tell me what the pros/cons are between the different types of cabinet. Also curious if you guys would leave these ports alone or experiment with making port covers to plug them and compare?