New to me bhk pre amp

Just purchased a used bhk pre amp anything I should know or do. The rest of my kit is Direct stream sr, m700 amps, 3.7 magnapan and 2 ti9 rel subs

Congratulations the threads on tube rolling will be of interest.

It’s supposed to come with some different tubes not sure what one’s time to do some reading I think thanks

Just enjoy the hell out of it