Older 400- should I use 6L6's?

[pbman1953]

I have the 400 version that uses 6550's or 6l6's. According to customer service, they felt that 6l6's produced more power over the 6550' s. I can't see how that's possible because 6550 create more juice overall. The voltages are higher.

If the 6550's win the argument, which brands would you go with? I've heard nothing but praise for the Tung Sol's.

If 6l6's win, I'll need an answer for that too

Thanks