Random Loud Bass Hits

[Skillet 10+ year member]

I just recently put together my Db drive 1200.1D and my 2 12" Db drive PLW's. Everything sounds pretty awesome except when I begin to listen to music (about 5 minutes into a drive) I get a random loud, long (about 6-7 seconds) bass hit out of nowhere. Another one usually hits soon after. After these two bass hits everything seems to play normally. Any suggestions on why i get these two random bass hits? And I have a crossover setting on the amp along with a lowpass filter, subsonic filter, input level and bass boost. Does anyone have suggestions on what to set the crossover (on or off) and the lowpass and subsonic filter on? I am a n00b when it comes to how to set everything so it doesn't sound to weak or too distorted.

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[atlninja82 10+ year member]

sounds like a bad ground

 

[Skillet 10+ year member]

The ground wire I am using worked fine for my previous system. I just put together these new subs wired in parallel this past weekend. Could there be a loose connection causing this? Would a loosely connected ground cause this? All because of some fvcking thieves, I have to hassle with matching and wiring a new system by my lonesome //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif

 

[Skillet 10+ year member]

And what would running my RCA with my power do? Of course the smart guys that installed my old system at circuit city ran the RCA with the power cable...

 

[Villeza1 10+ year member]

The ground wire I am using worked fine for my previous system. I just put together these new subs wired in parallel this past weekend. Could there be a loose connection causing this? Would a loosely connected ground cause this? All because of some fvcking thieves, I have to hassle with matching and wiring a new system by my lonesome //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif

That would be a good idea. Check all your connections, make sure the thieves didnt fuck something up. Doesnt sound like a bad ground, if everything was fine b4, it might be the amp.

 

[Jh8909 10+ year member]

the rca's on your headunit might starting to be getting fishy, try taking it out and play around with the sub out when music is playing and see if you can hear a difference. if you hear an audible difference while your twisting your rca's their starting to go, get a better head unit.

 

[Skillet 10+ year member]

If it were the amp (I hope not it is a brand new amp) could it be one of the filters or crossover setting causing this? Maybe too high of an input level? And what is wrong with the RCA being with the power cable, what problems would it cause? Sorry to be a nuisance.

 

[Jh8909 10+ year member]

your rca wires are running right along your power wire??? thats a no no. thats cause for a lot of unwanted noise.

 

[Villeza1 10+ year member]

your rca wires are running right along your power wire??? thats a no no. thats cause for a lot of unwanted noise.

X2

I'd check out the RCA's first. Play with them (lol), move them away from the power wire. If no change, test the amp.

 

[Skillet 10+ year member]

Ok, Yeah it looks like they ran the RCA right down the side of my jeep with the power wire... I will move that and check all the connections. Thanks for the help!

 

[Skillet 10+ year member]

I recently got new RCA's and ran them down the opposite side of my car. The bass hits still happen randomly //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif I played with the subsonic filter and when the subsonic filter is set to 50Hz then I do not get any of the random bass hits. When i set it to around 20Hz the random bass hits occur... Is this a sign that the amp is bad? How would i test the amp?

 

[lilmaniac2 5,000+ posts]

No thats not a sign that the amp is bad, the random bass is apparently below 50hz....

Best guess is RCA connection on the HU, try swapping the output on the HU ( if your using the subout try the rear rca out ) see if that fixes the problem

 

[Skillet 10+ year member]

Ok, I will try that. Thanks for the help!