Actually tube amps have output transformers and not autoformers. The difference is in the primary excitation scheme. Overall they are similar - but not the same.
I too would go for the MC402. It will never need any maintenance and will sound awesome with your Bes. Although the MC252 would be plenty of power already.
Arthur
I too would go for the MC402. It will never need any maintenance and will sound awesome with your Bes. Although the MC252 would be plenty of power already.
Arthur