<![CDATA[sub/amp problems]]>I am having an issue with my subs/amp right now, every time they try to go the amp flashes the protection light and it happens every couple of seconds. this just started ooo 5 min ago and before this they were not doing anything since one of the wires from the amp to the subs came loose. any idea what i need to do to fix it or is something toast? also i havent taken a look at any of the fuses yet but i figured if one went nothing would be working.

]]>https://fargostreet.com/topic/20365/sub-amp-problemsRSS for NodeWed, 27 May 2026 20:32:53 GMTTue, 24 May 2011 02:01:33 GMT60<![CDATA[Reply to sub/amp problems on Wed, 05 Oct 2011 20:06:05 GMT]]>I'd really have to see it to know for sure at this point. As for the speaker wire grounded to the ground wire.....I'd have to see before I knew if that was a problem or not as well.

]]>https://fargostreet.com/post/313352https://fargostreet.com/post/313352Wed, 05 Oct 2011 20:06:05 GMT<![CDATA[Reply to sub/amp problems on Wed, 05 Oct 2011 18:07:03 GMT]]>all connections seem to be good. so i tried adjusting some of the settings on the amp and now the protection light is flashing on and off again.

]]>https://fargostreet.com/post/313351https://fargostreet.com/post/313351Wed, 05 Oct 2011 18:07:03 GMT<![CDATA[Reply to sub/amp problems on Wed, 05 Oct 2011 17:24:31 GMT]]>im checking all my connections right now. then im going to try and check if there is any power going from the amp to the sub. I have a feeling that there is something wrong with the amp but hopefully its just a connection.

The amp is a Rockford Fosgate p300-1 and the sub is a Kenwood KFC-W12. did not buy the sub in town, got it online bnib. also checked the sub after i hooked it up to the amp and got nothing and it seems to be fine but i would need to hook it up to a working amp to fully know.

Also while i was checking the ground wire, there was some speaker wire grounded with it. any idea what that would have been for?

]]>https://fargostreet.com/post/313350https://fargostreet.com/post/313350Wed, 05 Oct 2011 17:24:31 GMT<![CDATA[Reply to sub/amp problems on Wed, 05 Oct 2011 13:53:16 GMT]]>Double check all of your connections (RCA inputs on amp/outputs on deck; speaker wires on amp, inputs on sub, etc...) to make sure signal is making its way from the deck to the amp. If any connections loose/unhooked, reconnect them.

While your old sub was out is it possible that the speaker wires shorted together? This can cause the amp to blow it's output channels which would mean the amp is dead/needs repair.

Also, you said that you got a new sub.... does this mean brand new sub purchased from a local retailer or does it mean "new to you" where you bought it on craigslist/ebay/some shady online store. If it wasn't bought brand new in box from a local store I'd say there is a 30% chance that you bought a defective sub that the previous owner knew was dead when he sold it.

What is the make/model of the amp and sub? I ask because it's possible (not necessarily likely) that if it is a low end amp that initially it had a surge/spike that took out the amp AND fried your old subs voicecoil simultaneously.

If you want me to spend 10 minutes looking it over for you I can do that as well for no charge.

701.541.3484

]]>https://fargostreet.com/post/313347https://fargostreet.com/post/313347Wed, 05 Oct 2011 13:53:16 GMT<![CDATA[Reply to sub/amp problems on Tue, 04 Oct 2011 23:44:57 GMT]]>new problem with the amp/sub. so i got a new sub but when i hooked it up nothing happened. only light on, on the amp is the power light. its a 4ohm svc sub and im wondering if i just wired it up wrong or if there is something i could be missing.

]]>https://fargostreet.com/post/313341https://fargostreet.com/post/313341Tue, 04 Oct 2011 23:44:57 GMT<![CDATA[Reply to sub/amp problems on Wed, 21 Sep 2011 05:50:46 GMT]]>More often than not, it is the subwoofer that is blown. Hence the advice given to verify wether or not it was one or the other. While i have seen the same thing happen to other amps that you described, its not a common occurance and would be a diagnosis further down the road from the initial diagnosing. Good option nonetheless. Great to see others input.

]]>https://fargostreet.com/post/313185https://fargostreet.com/post/313185Wed, 21 Sep 2011 05:50:46 GMT<![CDATA[Reply to sub/amp problems on Tue, 20 Sep 2011 20:40:20 GMT]]>I had the same problem with a Phoenix Gold amp. Would go into protect mode. I blamed the sub, had it warrantied, and it was the amp. A resistor had burnt off the board and was causing the amp to go into protect mode under load.

]]>https://fargostreet.com/post/313176https://fargostreet.com/post/313176Tue, 20 Sep 2011 20:40:20 GMT<![CDATA[Reply to sub/amp problems on Thu, 26 May 2011 12:52:01 GMT]]>

civic91;323039 wrote:
pretty sure they are blown when i push down on them they make a bit of a grinding noise

Yep lol

]]>https://fargostreet.com/post/311290https://fargostreet.com/post/311290Thu, 26 May 2011 12:52:01 GMT<![CDATA[Reply to sub/amp problems on Thu, 26 May 2011 05:45:35 GMT]]>pretty sure they are blown when i push down on them they make a bit of a grinding noise

]]>https://fargostreet.com/post/311287https://fargostreet.com/post/311287Thu, 26 May 2011 05:45:35 GMT<![CDATA[Reply to sub/amp problems on Thu, 26 May 2011 01:17:21 GMT]]>

civic91;323033 wrote:
well i am just starting to look at subs again so send me some info on the sub and a price.

Did you check the resistance to make sure it's blown?

]]>https://fargostreet.com/post/311284https://fargostreet.com/post/311284Thu, 26 May 2011 01:17:21 GMT<![CDATA[Reply to sub/amp problems on Wed, 25 May 2011 21:58:53 GMT]]>well i am just starting to look at subs again so send me some info on the sub and a price.

]]>https://fargostreet.com/post/311281https://fargostreet.com/post/311281Wed, 25 May 2011 21:58:53 GMT<![CDATA[Reply to sub/amp problems on Tue, 24 May 2011 23:51:27 GMT]]>And if your sub is blown, I have a sweet 12" MTX 9500 series for you 🙂

]]>https://fargostreet.com/post/311272https://fargostreet.com/post/311272Tue, 24 May 2011 23:51:27 GMT<![CDATA[Reply to sub/amp problems on Tue, 24 May 2011 03:56:38 GMT]]>one probably is for sure. but remove them and verify no wires are touching. then, hook one up at a time to see if one or both cause it to go into protect. If you can, have someone measure resistance of each sub with a multimeter to see what the ohms of resistance are.

]]>https://fargostreet.com/post/311259https://fargostreet.com/post/311259Tue, 24 May 2011 03:56:38 GMT<![CDATA[Reply to sub/amp problems on Tue, 24 May 2011 03:50:41 GMT]]>well the protection light doesn't flash when the subs are disconnected, so looks like they are blown.

]]>https://fargostreet.com/post/311258https://fargostreet.com/post/311258Tue, 24 May 2011 03:50:41 GMT<![CDATA[Reply to sub/amp problems on Tue, 24 May 2011 02:18:47 GMT]]>Unhook the sub and see if it still does this. If it doesnt. its your sub that is blown. If it does, your amp needs repair or replacement.

]]>https://fargostreet.com/post/311256https://fargostreet.com/post/311256Tue, 24 May 2011 02:18:47 GMT