Of course you could look at different speakers. I used a no longer made Weber Chicago series speaker in my own Tode. It has a lot bigger magnet and a different cone. I guess something similar might be one of the Weber 8s with bigger ceramic magnets (none of the alnicos will fit). However the biggest gain can probably be made by trying an external cabinet with bigger speakers. I have a 4x12 cab with Celestion speakers that makes for a very different, fatter sound with Tode, and a single Eminence Legend 12 in an old wall mount cabinet that falls somewhere in between and works nicely for jazz.