Question about Sunfire True Sub MK II Subwoofer

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Sunfire annoying popping noises

Every now and then my sunfire issues 3 to 5 loud pops. I can't pin down any input sequences that produce the popping so I can't re-create the noises. It started about a year ago and seems to be getting worse.

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  • Vorsche Apr 01, 2009

    Mine does the same thing, I took it to a very good local shop and they told me one of the subs was over extending the coil. I need to send it into the repair facility, if I can get them to call me back.

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If you remove the volume knob, and tighten the nut below, it should take care of the popping noise, as well as any input noise issues. Based on my experiences with my MKII

Posted on Jul 08, 2009

  • under2x Oct 12, 2010

    This totally cured my intermittent hum on my mk 2... was driving me insane. I tried an adapter to isolate the ground (thinking it was a ground hum) and even a ground isolating power conditioner. Nothing worked until I saw this and tightened the nut under the volume knob.

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There are grounding issues on the Sunfire subs, your best bet is to solder a ground network connecting the negative side of the RCA inputs, and potentiometers to ensure the are connected directly to the ground-lug (green wire) inside the amp. Make sure it is disconnected from the power for a few days before you open it, or the 200volt capacitors could give you a hit!

Posted on Sep 15, 2015

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Posted on Jan 02, 2017

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Hi Megan,

I appreciate you adding me to your list of contacts and asking me to help you with your problem.

However, I don't know if I can be much help from here. Noises can be very difficult to diagnose when you actually have the vehicle in front of you. All I can tell you for sure is that the noise you are hearing is not normal and if it happens only when you apply the brakes, then it is most definately brake-related. I have had some vehicles making noised as you described because of broken brake hardware. I have had some with similar customer complaints that have had loose or missing caliper mounting pins. Then I have had some that the problem was not the brakes at all, but rather lower control arm bushings that were coming apart and applying the brake was making the entire front suspension shift and make a loud popping noise.
My professional advice is to take it by a professional auto repair shop and have one of the technicians drive the vehicle. They may be able to give you some idea of what is going on just by hearing and/or "feeling" the noise themseves. Then again, they may tell you that the wheels need to be removed for a full brake and suspension inspection before they can tell you anything.

I wish I had a more "cut-and-dry" answer for you, but I am afraid that is pretty much impossible at this point.

Good luck,

Dave (dttech)

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-Dylan

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