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<blockquote data-quote="beastyle" data-source="post: 37657" data-attributes="member: 542068">Fiat problem.... At first I had two external amps and one in a sealed box, the one in the sealed box didnt allow remote bass controll (only on the box itself) so I added a caliber rc unit and stashed it in the dash...The sub&#039;s frequenty and gain level are all the way up so that I can set it correct through the caliber unit however (it does work) I have an annoying thump and have CD switching noises (only if frequenty is real low) when the volume is lowI know how to fix it (cant change grounds, and grounds are clear, also multimeter indicates that grounding has little enough resistence), but I want to know why it occured in the first place, can it be because there&#039;s a shitload of RCA underneath my radio and on top of the caliber unit ? The unit is about 5 x 5cm and has two rca in and two rca out&#039;s.I tried solving it with an LT2 filter which basically is an ground loop isolator and indeed the sound was gone, the confusion remains because it cannot be the ground //content.invisioncic.com/y282845/emoticons/crazy.gif.c13912c32de98515d3142759a824dae7.gif</blockquote>

[QUOTE="beastyle, post: 37657, member: 542068"] Fiat problem.... At first I had two external amps and one in a sealed box, the one in the sealed box didnt allow remote bass controll (only on the box itself) so I added a caliber rc unit and stashed it in the dash... The sub's frequenty and gain level are all the way up so that I can set it correct through the caliber unit however (it does work) I have an annoying thump and have CD switching noises (only if frequenty is real low) when the volume is low I know how to fix it (cant change grounds, and grounds are clear, also multimeter indicates that grounding has little enough resistence), but I want to know why it occured in the first place, can it be because there's a shitload of RCA underneath my radio and on top of the caliber unit ? The unit is about 5 x 5cm and has two rca in and two rca out's. I tried solving it with an LT2 filter which basically is an ground loop isolator and indeed the sound was gone, the confusion remains because it cannot be the ground [IMG]//content.invisioncic.com/y282845/emoticons/crazy.gif.c13912c32de98515d3142759a824dae7.gif[/IMG] [/QUOTE]

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