I want a DI box to connect my bass to my amp and PA.
Bass is a passive Fender P
Head is Promethean P500H
Cab is Markbass 210
I'm keen on Radial stuff but they have so many to choose from.
Active or passive?
Which model?
Any other DI boxes recommended?
Active. You want a Radial J48. If not that, then a Countryman Type 85. Either way, you'll never have to worry about whether you DI is good enough.