I used to own 2 Carvin V212's (vertical 2X12 cabs) loaded with those. They were my 1st cabs. I'll tell you what, when I got a Mesa cab for the first time, I could not believe what kind of night and day difference it made along with Celestion speakers. If I were you, I wouldn't worry about temp/humid changes and change the speakers/cab instead. Your ears will thank you. Mind you I used them for years and I THOUGHT they sounded great until I really DID have great cabs to compare. It's 5 years since I got rid of the Carvins (like some of their tube amps, just not they're cabs/house brand speakers) and I am never looking back. Here's a tip for inexpensive good tone: Marshall MF280 cabs ($400 or so).