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I bought speaker circut breakers (70 watt) to protect my tweeters from blowing, as my amp is a GFA555 200wpc and my speaks are 150watt Wharfedale modus ONESIX's. I put them in line on the positive side coming from the crossover to the terminal closest to the side that has the writing on the breaker then out the other to the tweeter. while driving them a bit hard I blew another one yesturday, are they hooked up wrong?

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  • ideal_dls10 Mar 20, 2011

    I purchased these breakers from parts express, they are 1.0 amp current hold. They state that when they reach 200% of rated hold for 5 sec. they open. My Adcom GFA555 has instantanious distortion alert lights which vaguely light intermitently which is supposed to be acceptable. I have ordered 0.85 Amp breakers lowering the output wattage per their spec's to 120 watts. they offer 0.7 A and 0.5 A should I order one of these? lowering output wattage to 100 w and 80 w respectively.

  • ideal_dls10 Mar 20, 2011

    these breakers are 1.0 Amp they offer .85 .7 .5 Amp versions. I do not believe it is a distortion issue as my Adcom GFA55 has distortion alert which seems to function properly as I see intermitent light which they say is normal. What in your professional opinion should I do to protect these tweeters, as I really like these speakers otherwise

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  • 8,546 Answers

Your hookup is electrically sound but perhaps it is distortion that is killing the tweeter rather than raw power. And I doubt there are many consumer tweeters out there that could handle 70 watts in their pass band anyway.

I've never heard of a circuit breaker that was rated in watts. Amps (current) maybe.

Peruse this discussion, especially the last comment...

http://www.talkbass.com/forum/f15/tweeter-wattage-ratings-what-do-they-mean-661897/

What IS the rated power dissipation spec for the tweeters youi keep killing?

Posted on Mar 20, 2011

  • David Dunn
    David Dunn Mar 21, 2011

    5 seconds of overload is a long time in the tweeter world.

    Your crossover could be failing to filter the lows. Guessing at an acceptable current rating is going to be hit and miss.

    See this discussion. Another user had his own fix (solution 2).
    http://www.fixya.com/support/t353703-wha...

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