I'm not familiar with the biasing process for Rogue amps but some amps have a bias trimpot PER TUBE (CJ) which makes tube matching less critical. My ARC VT100 MKII amp had just one bias trimpot PER FOUR tubes. In this case tube matching is more important.
You can buy matched pairs or matched quads from most tube dealers or just a single tube. If just one tube blows, I would probably buy a matched pair anyway and just keep the spare handy. Over time, you'll probably own several sets of tubes anyway! I have KT-88's and 6550C's that I like experimenting with. It's part of the fun.
As for expense, in all honesty I have never had a tube blow or wear out on me yet but I've only been playing with my tube gear for about 1 year. Even if you had to replace ALL your tubes in 1 year (not likely) thats a small investment compared to the quality sound you'll enjoy with tubes.
I've tried ARC VT100 MKII, Conrad-Johnson Premier 11a, Classe CA-200, Classe CA-300 (bought and sold used). So far I like the CJ the best. And so far I still like the original 6550C tubes. Have fun!
You can buy matched pairs or matched quads from most tube dealers or just a single tube. If just one tube blows, I would probably buy a matched pair anyway and just keep the spare handy. Over time, you'll probably own several sets of tubes anyway! I have KT-88's and 6550C's that I like experimenting with. It's part of the fun.
As for expense, in all honesty I have never had a tube blow or wear out on me yet but I've only been playing with my tube gear for about 1 year. Even if you had to replace ALL your tubes in 1 year (not likely) thats a small investment compared to the quality sound you'll enjoy with tubes.
I've tried ARC VT100 MKII, Conrad-Johnson Premier 11a, Classe CA-200, Classe CA-300 (bought and sold used). So far I like the CJ the best. And so far I still like the original 6550C tubes. Have fun!