Posted by thylantyr [ 66.35.226.228 ] on April 03, 2007 at 10:16:29:

In Reply to: ribbon protection with electronic crossover? posted by Steven Homrighausen on April 02, 2007 at 20:38:37:

Most true ribbon tweeters are delicate, the capacitor is a good idea, but
you should get a high quality capacitor, otherwise I never used
capacitors in active system to protect tweeters, I use inline fuses
with the tweeter. I start with 3/4A AGC fastblow and skew up or down
after a few trials to calibrate the setup.

For true ribbons, the cap + fuse combo is what I would do in your situation because an array of
ribbons can cost alot of mullah. If this is planar tweeters and
not true ribbons, ie, Dayton PT2 or similar, then there is no worry
about blowing these drivers up. Planar technology is much more robust
than true ribbons and you won't blow these drivers up on power glitches. Even though I fused my PT2 planars in my array, I've only
blew the fuses a couple of times in two years and those tweeters
get tortured alot and nothing has blow yet. I'm surprised how well
they can handle torture.

re: power up transients.

Follow proper power up/down sequencing to minimize risk.

Turn on audio system: Turn on the sources first then amps last.

Turn off audio system: Turn off amps first, then sources last.

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