Do I need a cap here?
 

I'm going the direction of fully active tri-amp setup with dipole woofers, dipole mids and Fauntek neo2.0 cd using a driverackPA as the processor.

My question is, if I want to power the ribbon tweeter section with a tube amp like a darling 0.75W of power (btw the neo is rated 97dB/w) do I need a coupling capacitor for DC protection here ? By right I do not need them as the tube amp already has the OPT to filter DC. Am I taking a huge risk by omitting the cap ?

will.

Hums, etc, might be a risk. I would probably not use one, but I'm a maniac :)

Anyone else with similar experience ?

If you are already transformer coupled, you shouldn't have any DC to block. The only time you'd have DC issues is if you had a transformer failure, and then you've got big problems anyway. A series cap could protect you from low frequency content while you are getting your crossovers sorted out, and may be a good safety measure though.

I'd put a cap in during testing for protection until you've got your crossover roughed in, and pull the caps out or short across them for final voicing.

Sheldon

That's a good thought thanks ! Perhaps I can put a cap with a delayed bypass switch using a timer, so that during power up the cap will be there, only to be bypassed after a minute or so.