Hey everyone! So I just scored an unbeatable deal on a nameless 2x12 cabinet that is perfect in structure and cosmetics, but has some blown speakers. I'm looking to replace the speakers and I'm hoping to get some insight into the more cerebral factors that go into cab design. I see lots of talk about WinISD, but none of it makes sense to me. So that being said, here's the cab: Sealed 2x12 cabinet with speakers in the typical diagonal layout. Height: 25.75" Width: 25.5" Depth: 15.875" Here's what I want: 2 new speakers that have good enough extension down low to be a stand-alone cab for a 4-string, that's occasionally de-tuned to drop C# but keep the punch of a sealed cab. I'll be adding a ported 2x12 down the road to get more speakers and lower extension. I've been looking at Kappalites, Deltalites, Basslites, Celestions, Jensens.... and I've overloaded myself, so I appreciate your insight. I play mostly rock, ranging from pop-punk/alternative to heavy rock like Chevelle, with a mix of funk, hip-hop, and worship mixed in. Thanks for the help guys!