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<blockquote data-quote="Streetz" data-source="post: 5206692" data-attributes="member: 602994">I&#039;m actually unsure if it&#039;s the amp, headunit or subwoofers...I recently just installed a new subwoofer setup (2 RF P3D412, a Profile AP2000 amplifier and a custom vent box).&nbsp; For about a week everything worked fine, than the subwoofers have a constant humming sound coming out of them.&nbsp; When the music is up loud and deep bass hits the subwoofers make a horrible distortion sound.&nbsp; I don&#039;t really know how to describe it other then it&#039;s not right and is freaking me out.&nbsp; When that happens all the lights inside and outside dim.&nbsp; I&#039;ve tried different RCA cables and moving the ground to a new place (had to move it anyways).&nbsp; The amp is pushing about 75-80% (350-400w x 2) even though the subwoofers are able to handle full load.The humming is constant and will get louder or softer if I change the output of the amplifier.&nbsp; It&#039;s not real loud, just enough to be annoying if I have music muted or paused.&nbsp; Also I noticed yesterday it only happens when playing a CD, didn&#039;t hum when switched to radio.&nbsp; When I unplug the RCA cables the humming stops.&nbsp; When I disable the subwoofer output via headunit, the humming still continues which leads me to believe it&#039;s not the HU.&nbsp; Last thing is when I turn on the car a popping noise comes from the subwoofers for a brief second.I have an old Pioneer headunit that needs to be replaced soon because it&#039;s been acting up for a while now, but with the joly season coming up, money is short and would like to wait until next year if at all possible.I&#039;m not sure where to start with the problem, or what could be causing it.&nbsp; I checked the subwoofer wiring, everything&#039;s hooked correctly.&nbsp; I thought maybe I need a cap or do &quot;the big 4&quot; which I haven&#039;t done yet, or the headunit.&nbsp; I&#039;m thinking power is the issue and a cap is needed.&nbsp; I&#039;m praying it&#039;s not the new amp or subs though.&nbsp; Any help is greatly appreciated, so thanks in advance for any help! //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif</blockquote>

[QUOTE="Streetz, post: 5206692, member: 602994"] I'm actually unsure if it's the amp, headunit or subwoofers... I recently just installed a new subwoofer setup (2 RF P3D412, a Profile AP2000 amplifier and a custom vent box). For about a week everything worked fine, than the subwoofers have a constant humming sound coming out of them. When the music is up loud and deep bass hits the subwoofers make a horrible distortion sound. I don't really know how to describe it other then it's not right and is freaking me out. When that happens all the lights inside and outside dim. I've tried different RCA cables and moving the ground to a new place (had to move it anyways). The amp is pushing about 75-80% (350-400w x 2) even though the subwoofers are able to handle full load. The humming is constant and will get louder or softer if I change the output of the amplifier. It's not real loud, just enough to be annoying if I have music muted or paused. Also I noticed yesterday it only happens when playing a CD, didn't hum when switched to radio. When I unplug the RCA cables the humming stops. When I disable the subwoofer output via headunit, the humming still continues which leads me to believe it's not the HU. Last thing is when I turn on the car a popping noise comes from the subwoofers for a brief second. I have an old Pioneer headunit that needs to be replaced soon because it's been acting up for a while now, but with the joly season coming up, money is short and would like to wait until next year if at all possible. I'm not sure where to start with the problem, or what could be causing it. I checked the subwoofer wiring, everything's hooked correctly. I thought maybe I need a cap or do "the big 4" which I haven't done yet, or the headunit. I'm thinking power is the issue and a cap is needed. I'm praying it's not the new amp or subs though. Any help is greatly appreciated, so thanks in advance for any help! [IMG]//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif[/IMG] [/QUOTE]

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