Question about Sony XM-2252HX Car Audio Amplifier

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One fuse keeps blowing

This amp was pushing one Kicker svc 2 ohm CVR pretty good in mono bridged mode. Well, I bought a second sub and went to a bigger power and ground, (4 ga), and now it's blowing the right hand fuse. (as you are looking at the fuse end) I unhooked the other sub, and still doing the same. I have removed the circuit board to see anything obvious, but nothing stands out. I have a good test meter, but need help to find out what and how to check it. Any help would be appreciated.

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  • Kickersubnut
    Kickersubnut Feb 09, 2008

    yes, it calls for a 40 amp on each side

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Sounds like you have a shorted transistor(s). they often don't show physical damage when they go. Check each of the 3 legs of the big transistors with the power off, there are 4 on each side of the amp. Set your meter to lowest ohms range and probe between the 2 outside legs and then from each outside leg to the center leg. If you get around 0 ohms between 2 legs you probley have a bad transistor. 0 ohms between all 3 and you deffinatley have a bad transistor. Once you find a bad one all 4 should probley be replaced. If your lucky nothing else was damaged on the board. If you miss something else its likley that the new transistors will smoke. You amp is rated for minimum 2 ohms bridged

Brian

Posted on May 13, 2013

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What size fuse is it usually you use at least a 40

Posted on Feb 09, 2008

  • James wood
    James wood Feb 09, 2008

    sorry but i cant think of anything right now

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Assuming the amplifier is 2 ohm mono stable... the amplifier is bridgeable... and the subwoofers are Single 4 Ohm Voicecoils, You would wire them as follows....

Both + on Both subs to the + bridged terminal on the amplifier.
Both - on Both subs to the - bridged terminal on the amplifier.

This will net a 2 ohm mono load for your amplifier.

If you have something different - let me know... and I will give you the proper wiring for what you have.

Thanks for using FixYa - a FixYa rating is appreciated for answering your FREE question.

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Building Competition stereo's is a big hobby of mine.

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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.

Have fun
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1 Answer

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2 Answers

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Ok.. Bridge the two sub into 4ohm than bridge to amp.


So. this how it goes.

sub1 + -
to      | |
sub2 - +
=      4ohm
       

           From Sub
                Two
            -          +  
            |           |
amp (L) - + (R)- +


This will use the full potiental of RF 800a2 amp. I believe it like 1153 watts max out.

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