fuse size for als plats

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murdox55
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fuse size for als plats

Post by murdox55 » Wed Dec 22, 2010 6:48 pm

just blew a fuse on one of my plats...fuse was a 4a...is this the correct size? i had my 300x2 cranking and it blew. i am surprised as the plats are rated at 1200w.

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BillD
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Re: fuse size for als plats

Post by BillD » Wed Dec 22, 2010 7:04 pm

Yes, the correct fuse is a Cooper-Bussman MDQ-4, a dual element time-delay fuse.

The reason you blew it is that although your Plats can take 1200W peaks, they can't take anything like that sustained before burning up the ribbon or the voice coils in the woofers. That's why the slow blow fuse. Your amp can put out about 50V/channel before clipping. Because it's a load invariant amp, it will continue to put out that 50V no matter what the load is. Now, Ohms law say E (volts) = I (amps) ∙ R (ohms). If your load is 4Ω and your voltage is 50 at clipping, current is 12.5A at clipping.
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angelod307
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Re: fuse size for als plats

Post by angelod307 » Fri Dec 24, 2010 2:09 am

yeah...what bill said....
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Scarabeo
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Re: fuse size for als plats

Post by Scarabeo » Fri Dec 24, 2010 2:43 am

angelod307 wrote:yeah...what bill said....
+1
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