Question about Sony XM-2100GTX Car Audio Amplifier

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Sony XM-2100GTX Car Audio Amplifier sound but very low

Driving along to work and the bass like died, pulled over and there is sound coming from my 15 inch sub but no big bass? all lights are on, cap, working any ideas

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  • markus223 Oct 09, 2007

    Tryed another sub exacly the same and the bass is there but further into the song it disapears and comes back when it wants to , the bass stays on at the beginging of the song then dies through it ? the amp isn't hot and all lights are on as normal?

  • markus223 Oct 09, 2007

    it happens when driving and Stationary, i'll try the RCAs when i get home,haven't got any spares but i'll ask around, how can you tell if there damaged,

    thanks for help so far :)

  • markus223 Oct 11, 2007

    i've tried another sub smaller this eveing and it doesn't cut out but this is a infinity 1200 w sub the original sub was a 1500 w which works in my mates car with sinalir power amp. , but i've noticed my Farehd cap which is a toxic 1 Farehd  cap the blue lights go off after while is this normal  after the turn the key. i've checked rca wires and i've checked and turned the switches on the amp but seems to work with smaller sub but bigger sub the problem continues?



     



    thanks so far :) really been great thanks

  • markus223 Oct 11, 2007

    how would i find that out ? im a novice at all this lol sorry if it sounds stupied lol

  • markus223 Oct 11, 2007

    my sub i have the problem with is Toxic TSW150F

  • Anonymous Jan 19, 2009

    very low sound coming from two speakers

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  • Master
  • 631 Answers

If there is sufficient voltage at the amp, you may have blown the woofer. If you have another speaker, connect it to the amplifier to see if it plays normally. If not, the amplifier may have failed. Let me know what you find.

Posted on Oct 05, 2007

  • 2 more comments 
  • Perry Babin Oct 09, 2007

    If you have another set of signal wires (RCAs) going to another amp, use them to drive the sub amp to see if the problem remains.

    Does the problem seem to be related to shock/vibration (does it cut off when you hit a bump)?

  • Perry Babin Oct 09, 2007

    Moving the signal cables from the highs amp to the sub amp will send a known good signal into the amp. I'd suggest that you use the cables that were plugged into the highs amp. You know that they are in good working order. If the amp still cuts out, it's likely in need of repair.

    One other thing you can try is moving all of the controls on the amp. Sometimes a bad connection in a switch or pot can cause similar problems.

  • Perry Babin Oct 11, 2007

    What's the impedance of this woofer?



     



    What's the impedance of the 15" woofer?



     



    Some capacitors shut off automatically and some have a remote terminal to switch the display off. If yours doesn't have a remote terminal, it should shut off after the ignition is switched off.

  • Perry Babin Oct 11, 2007

    The easiest way is to measure the resistance with an ohm meter (with the speaker disconnected from the amp).



     



    Otherwise, you'll need to know if it's a single or dual voice coil woofer. If it's a DVC, you'll have to know if the coils are in series or parallel. You'll have to know the impedance of the individual voice coils. Sometimes the exact model of the woofer will tell you whether is a SVC or DVC and the impedance. You'd have to pull the speaker to determine if the coils of a DVC woofer are in series or parallel.



     



     

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