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Subs popping on turn on


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Looking for some help.  I have a 2008 Ford f250 diesel and am working on a small system consisting of pioneer avh 4200nex head unit, skar rp 1500.1, and 4 sundown 6.5 xv2.  I have asked in other places with conflicting answers.  I am getting a pop in the subs on turn only.  This also only occurs on a delayed turn on.  If i get in my truck and crank it over fairly quickly it does not happen, but if i turn the truck on without starting for about 30 seconds or longer when i finally do crank it over i get the popping. Just hoping to get some ideas on how to cure this. Thanks for any help

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OK have you made sure all the grounding points for the amp are bare metal and no paint?  That could cause a small ark that could cause that to happen, and also the power wire is tight and secure in all locations, a small spark could cause something like that alot of times.

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may need a flyback diode on the relay.  When the coils magnetic field builds or collapses, it can cause a voltage spike

Chevy Sonic Wall (4) 15's on 10k Build Log

https://www.stevemeadedesigns.com/board/topic/209412-2015-chevy-sonicwall4-15s10klithiumlarge-case-hairpin-us-alts/

(4) Fi SP4 15's | (2) Ampere 5Ks | Active! | Arc KS600.2 & KS125.2mini | CDT Silk Domes | Silver Flute 8s | 240Ah JY | US Alts

Jeep Wrangler JK (4) 8's in a 4th Order Build Log

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Its not a dumb question, but it is a searchable question. Like, google. Or this forum. 

Chevy Sonic Wall (4) 15's on 10k Build Log

https://www.stevemeadedesigns.com/board/topic/209412-2015-chevy-sonicwall4-15s10klithiumlarge-case-hairpin-us-alts/

(4) Fi SP4 15's | (2) Ampere 5Ks | Active! | Arc KS600.2 & KS125.2mini | CDT Silk Domes | Silver Flute 8s | 240Ah JY | US Alts

Jeep Wrangler JK (4) 8's in a 4th Order Build Log

https://www.stevemeadedesigns.com/board/topic/209841-shadow-2016-jeep-wrangler-jk4th-order4-8sdc-35klarge-case-hairpin-us-alts/

IG @walledsonic

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1 hour ago, J21 said:

Well it's not on this forum and so Google explained what it does but i could still use help as to what relay I'm connecting it to.  

Here you go.  There's more to read in this thread but here is the post explaining the flyback diode and how it works with the relay (typical Bosch style 5 prong relay)

 

Chevy Sonic Wall (4) 15's on 10k Build Log

https://www.stevemeadedesigns.com/board/topic/209412-2015-chevy-sonicwall4-15s10klithiumlarge-case-hairpin-us-alts/

(4) Fi SP4 15's | (2) Ampere 5Ks | Active! | Arc KS600.2 & KS125.2mini | CDT Silk Domes | Silver Flute 8s | 240Ah JY | US Alts

Jeep Wrangler JK (4) 8's in a 4th Order Build Log

https://www.stevemeadedesigns.com/board/topic/209841-shadow-2016-jeep-wrangler-jk4th-order4-8sdc-35klarge-case-hairpin-us-alts/

IG @walledsonic

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