precbsed
I converted a stock 88 to a Magnum 88. It turned into a new amp. Besides being more extended and detailed (by quite a bit) It was also much more robust and dynamic. (Something I should make clear was my old 88 needed tubes before I upgraded it.) Still it was a smashing success. The best time to upgrade is when you need tubes (if Rogue puts in the tubes you want to live with - mine came with Electro Harmonex 6550s.)