Fishwater,
What isn't a PITA in hi-fi. just kidding, I know what you mean. The manual actually says that an outboard crossover isn't necessary becuase there is one internally for both sections. It also mentions good results for a 100-200 wpc SS for woofer and 30 wpc tubes for Mid-hi. But as you mentioned, it could be tough to match the levels. I don't think you'll get the best from the bass with 60 wpc tubes used for the woofers. I hope I'm wrong though.
What isn't a PITA in hi-fi. just kidding, I know what you mean. The manual actually says that an outboard crossover isn't necessary becuase there is one internally for both sections. It also mentions good results for a 100-200 wpc SS for woofer and 30 wpc tubes for Mid-hi. But as you mentioned, it could be tough to match the levels. I don't think you'll get the best from the bass with 60 wpc tubes used for the woofers. I hope I'm wrong though.