Dimming: 300 rms?

[psych0ticnemes1 5,000+ posts]

... yea i'm only running a jbl 180.2 (360rms @ 4ohms) and like 50 watts from my deck, and i have dimming at higher volumes with my head lights on... and granted, my gain is close to 3/4 (because i have my sub-out in the negatives) but should my elec really be that weak? I have a '91 Nissan NX 2000, so my alt probably isn't very big, but isn't this a bit ridiculous?

No big 3, didn't think i needed it with 300rms

Thanks for your input...

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[audiolife 5,000+ posts]

get your alt and battery checked at autozone...noway it should dim if working right. when that is checked and taken care of do the big 3.

 

[psych0ticnemes1 5,000+ posts]

big 3 is going to be done this summer, it is a must, especially in such a small vehicle...

does autozone check it out for free?

 

[audiolife 5,000+ posts]

yup might not be perfect but if there is soething wrong it should catch it

 

[psych0ticnemes1 5,000+ posts]

yup might not be perfect but if there is soething wrong it should catch it

ty sir.

 

[AgEnT 10+ year member]

yea my lights were dimming with only 400 rms and now my battery died lol. might have been the battery but idk.

 

[ultimate157 5,000+ posts]

Check the grounds on your amplifier, as that is most likely the problem. I had a 250w RMS amp it was dimming when I had a bad ground.

 

[SOundin LOUD 10+ year member]

I Had that problem at 200 RMS but i bought a cap and it fixed my problem

 

[psych0ticnemes1 5,000+ posts]

Check the grounds on your amplifier, as that is most likely the problem. I had a 250w RMS amp it was dimming when I had a bad ground.

how should i check my ground? you moved your ground and you didn't have dimming anylonger?

 

[ultimate157 5,000+ posts]

I Had that problem at 200 RMS but i bought a cap and it fixed my problem

Lols. //content.invisioncic.com/y282845/emoticons/rolleyes.gif.c1fef805e9d1464d377451cd5bc18bfb.gif

how should i check my ground? you moved your ground and you didn't have dimming any longer?

Yes. You don't necessarily have to move it, just make sure it is screwed down onto a completely bare, shiny piece of metal.

 

[psych0ticnemes1 5,000+ posts]

Lols. //content.invisioncic.com/y282845/emoticons/rolleyes.gif.c1fef805e9d1464d377451cd5bc18bfb.gif


Yes. You don't necessarily have to move it, just make sure it is screwed down onto a completely bare, shiny piece of metal.

alrighty, thank you sir

 

[jiggy2dmax 10+ year member]

Sounds like your clipping the amp.

 

[n2audio 5,000+ posts]

Sounds like your clipping the amp.

may be, but even a clipped 300w amp shouldn't change things much.

Most of the power increase from clipping comes from an increase in efficiency of the amp when clipped, not so much from extra current being drawn.

Psycho, what about dimming from other electronics (hu off)?? When you flip on your blower motor, or press the brakes?

 

[Megalomaniac 5,000+ posts]

are you bridging the amp? caus emy friend had his bridged and its not recomened on his amp and his amp was demanding too much current and gettting hot

 

[spin dB 10+ year member]

I would check the grounds but I doubt it is it. I would check to make sure that the amp is not bridged past it's rated power handling. I would think that maybe the amp is not the main culprit. I would bet that either the battery or the alt is faulty. Have those checked out at autozone like previously suggested and see what they say. If you still have problems then I would say that something in the electrical system is wired wrong. If your amp is hooked up correctly then it should not be dimming with only 300Wrms.

 

[profundus-sanus 10+ year member]

i agree with everyone else, except the guy laughing about the cap, they do have purpose.

Get the battery and alternator checked. Then check your ground connections, for the battery grounds too. Also, assuming you haven't already, check your positive connections at the battery. Corrosion *****.

Maybe if you have acess to a clamp meter check and see how much current your amp is drawing too.