US Acoustics Recent Questions, Troubleshooting Help & Support

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  • 14 Products
  • 19 Answers

  • 120 watts x 4 at 2 ohms
  • 240 watts x 2 in bridged mode
  • US Acoustics... | Answered on Apr 04, 2011

    There is a possibility that there is a cable which was coming in contact with metal wearing it out eventually and causing a short making the amplifier go into protect or you have a shorted/damaged speaker. Check your cables. With the info you provide, thats the best i can do hope this helps dreamsystems

    US Acoustics... | Answered on Feb 08, 2011

    use the rca's there cleaner sound.

    US Acoustics... | Answered on Apr 09, 2010

    It depends on the quality of the 12s and voicecoil configuration.
    Do you know the lowest impedence the amplifier will operate? is it bridgeable?
    Howabout any low pass crossovers built in?
    I would wait for a better amplifier than risk damaging the 12s if they are worth anything.

    Thanks for using FixYa - a 4 THUMBS rating is appreciated for answering your FREE question.

    US Acoustics... | Answered on Nov 25, 2009

    Please, Please, stop using it, the fact it plays is a malfunction in itself, so get it fixed or get a new one b4 you light your car on fire...

    US Acoustics... | Answered on Oct 08, 2009

    Hello rjhunting,

    Most often the output MOSFET's and associated circuitry will burn out when the amp draws excessive current. And excessive current draw is most often caused by operating the amp into an impedance that is too low. Of course, depending on the age and actual use, the amp could have failed from normal use. The US Acoustics USX-4085 is a relatively good quality low-end amp that was manufactured with excellent components.

    All of their amps manufactured after 2001 carried a 3-year warranty. But when operated in "tri-mode", with normal speakers and a subwoofer, the subwoofer minimum impedance rating was 8 ohms. And the normal speakers should be operated through a high pass capacitor while the sub needed a 15.9 mH low pass filter inductor.

    The MOSFET's and resistors can probably be replaced at a qualified electronics shop. If you are somewhat handy with a soldering iron and have a controlled temperature soldering station, you can do it yourself. Parts are available from: and

    Hope this helps.

    US Acoustics... | Answered on Sep 28, 2009

    it aint the wire, the bigger the better.
    try checking your ground, if there any rust clean with sandpaper. if your gain and freq is cranked it will blow fuses and cut out, cuz the protect mode kicks in

    US Acoustics... | Answered on May 05, 2009

    Hello shwoop22,

    It sounds like power is shorting out or the amp is defective. With the fuse removed, use a multimeter set to ohms and check between the power terminal to ground.

    The protection light will normally come on if the amp overheats (for example when running with too low impedance), or if the speakers are shorted.

    Hope this helps.

    US Acoustics... | Answered on May 05, 2009
    try this site to see if it's for your model, but if not it should still give you the basics for installation. Now for the crossovers, if they are passive they will go between your head unit and amps or speakers. if you can tell me the make and model of the crossovers, i can tell you exactly how to hook them up. Let me know if this helps :)

    US Acoustics Car... | Answered on Apr 30, 2009

    85 watts
    Hope this is a fix Ya.........

    US Acoustics... | Answered on Feb 22, 2009

    My suggestion is to take it to a local repair shop and have them look at it

    US Acoustics... | Answered on Feb 20, 2008

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