Question about Kenwood Car Speakers & Subwoofers

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Hello, I have a Kenwood KDC-MP225 powering a KAC-8101D that was pushing 1 Bazooka EL1200, the last amp blew the other 1... I was driving along 1 day and cranked it up before the cd started playing, I don't ever do this! Well, the subs died out! I thought It finally killed the other speaker, hard to tell in this enclosure... I found out today when I hooked up a much smaller speaker to test the output it was putting out limited watts. It sounded like it was wired into the head unit. My LED is solid blue, I've tested the output transistors in place & all is well there. Anyone have any ideas? I really want to pull both banks out & test all the transistors but I assume the problem may lie elsewhere... Maybe the preamps from the head unit? Any help would greatly be appreciated!!! John

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First off try a different source that you know works that you can control the volume of. (ipod) This will tell you if the amp works. If it still doesn't work try a different speaker that you know works, any speaker will do, just keep the volume down. Second see if running a new set of RCA's helps maybe something got pinched if it still is not working then your head unit line out is bad, try a different output and see.

Thanks,
Mark

Posted on Nov 21, 2008

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You blew the amp. If you were running 4 subwoofers off of a dual channel amp you most likely running them bridged off of two different outputs. You most likely blew the resistor and because it was pushing more power then it could handle. Also when you bridge speakers it brings down the impedance which allows for the more power to course through. Suggestion is to buy a new amp that can handle 4 subs or 2 different amps for both sets.

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1 Answer

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Hello again debrahood196,

Your KAC-5204 amp is only rated to put out 60 watts per channel and really cannot push very hard. If your subs are the KFC-W110S, they are 8ohm subs and you will get better power from the amp by using the bridged connections, positive (+) on the left channel and negative (-) on the right channel. Wire both positives and both negatives from both subs to the bridged connections and the output will be 150 watts into 4ohms. Giving each sub 75 watts should make them push a little harder.

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A word to the wise... start with your volume very low and work up slowly most speakers will puk up the voice coil before the amp starts to get warmed up. you would hate to have to buy a new sub.

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1 Answer

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