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Question about Hifonics BX1000D Car Audio Amplifier

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No output I have a hifonics bx1000d. problem is little to zero output at the speakers. the amp is used and the previous owner swears it was working when he shipped it out. he has offered to refund my money but that's not the issue here. the amp will power up and stay powered up, no protect light. just the green power led. the protect does come on for a split second then goes off. the amp does not blow fuses or act strange in any other ways just very little output. I'm running a Kenwood headunit and an audio control eqx for the input. I have tried turining the eqx up till clipping and still nothing. I then tried bypassing the eqx and running the input straight off the sub output rca's from the headunit. still nothing. I then re-installed my old school Orion 2150sx and everything works like it should. one other question on my Orion the bolt thru the board got hot an d melted the nylock nut causing the amp to get really hot and the power trace lifted off the board do you think I can epoxy the trace down? I have put a new bolt thru it and it is working pretty good now for a 14 yr old amp...lol thanks andyj

Posted by Andy Jones on

  • Andy Jones Feb 17, 2007

    found out what's wrong with it.
    first off I sent the amp to a shop. the guy did a burn on it and found nothing wrong I called him and told him the symptoms he did another burn and still found nothing he said it was fine.
    I got it back hooked it up and problem was still there. I checked and rechecked the wiring, voltage on everything was within specs (13.5v)ground was good even checked the impediance on the subs (one of which had a broken lead but didn't cause problem) I went so far as to wire every sub to the amp by itself problem still existed I was ready to send the amp back to the seller when I figured I would have one more look at it.
    I pulled the back cover off and started looking it over even started checking everything I could with the meter. when I suddenly noticed a sheared leg on the inside one of the twin coils it was hard to spot at first because it was still over the soldier spot on the board but I took a test lead you could move it aside and see it had sheared off probably during shipping it was not burned in half it had sheared the box looked like it took a good hit during shipment!!! I pulled the board from the heatsink un soldiered the offending coil cleared the broken leg out of the board and was able to get enough slack on the coil leg to re soldier it to the board put it all back together put it in the truck the next day and violla!!!! it works perfect!!!!!
    thought I would post my find on here just in case someone else has a similar problem....
    thanks guys for your help



1 Answer

Mike Duncan

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Have you tried turning up the vol/gain control? Are all the switches on the amp set for full spectrum output? Are you sure you are using the RCA input and not the RCA output jacks (if it has such)? Check all the switches to be sure they are in the "most default" position. Something you might try, is to make a jumper wire to temporarily jump from the audio input ground to the power supply (chassis of car) ground. If this makes it work then you have a input ground problem in the amp. Good luck. P.S. As for epoxying the trace down on your other amp. If the foil is still in good condition then it should be ok to epoxy it down. If it needs some "help" then do that first, then epoxy.

Posted on Jan 22, 2007


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