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DC300A question


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#1 Ravemeister

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Posted 20 October 2005 - 07:38 PM

I want to buy one to power my JBL 4530 subwoofers in mono 8ohms (500w) but was told that they tend to fry speakers because they let DC through.. Someone told me this. If true, what is the solution to this?? I was thinking of a subsonic filter, but is that enough??
Thanks for your help in advance. biggrin.gif

#2 Wilder Bill

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Posted 21 October 2005 - 03:57 PM

While they don't normally let DC through, they can if a driver fails, leaving the power section permanantly on.  blink.gif
I think a large value cap could block DC, yet let audio through, from some very low freq, on up.
Since they can work all the way down to DC, they should be great for low freqs.
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#3 crownsound

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Posted 21 October 2005 - 05:35 PM

QUOTE(Ravemeister @ Oct 20 2005, 07:38 PM)
I want to buy one to power my JBL 4530 subwoofers in mono 8ohms (500w) but was told that they tend to fry speakers because they let DC through.. Someone told me this. If true, what is the solution to this?? I was thinking of a subsonic filter, but is that enough??
Thanks for your help in advance. biggrin.gif
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I have run Crown DC-300A,s since 1977, and have yet to fry my speakers because the amp passed DC! We used to run them bridge mono@8ohms, and yes, you could blow a woofer by overdriving the amp and speaker, but, I have never had one of these shoot DC!

My system is a commercial system that runs 14 hours a day, so...