My amp dims.... (not protection mode) - Realm of Excursion



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Old 03-28-2014   #1 (permalink)
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Default My amp dims.... (not protection mode)

So I bought a truck, and it had a system in it already. It had a brutus 2400 (which the guy kept), powering 2 kicker cvr 12's in a kicker box. To replace the amp that the guy had kept, I bought a BRX 1100. For a while now I have noticed that the amp's "Hifonics" lettering (that lights up blue) dims when bass plays. It doesn't even have to be coming from the subs. I can turn the subs all the way down via the bass control knob and it still does it. Sometimes more sometimes less. I've done the big three and it still happens.

What could this be? I checked the wiring to see if he wired it with the right size Wire and he did the Power wire with 4 gauge and a 150A fuse. This seems about right to me... I have it grounded to the body where a bolt for the back seats screws in with 1/0 AWG.

My headlights do not dim when the bass plays, the only dimming besides the amp's blue lettering is my dash (where the speedometer is etc.) and that only happens when I roll up my windows.
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Old 03-28-2014   #2 (permalink)
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Default Re: My amp dims.... (not protection mode)

i would check the ground connection.....make sure it is clean....free of paint
try checking/watching the voltage at the amp while playing and see if there is any drop
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Old 03-28-2014   #3 (permalink)
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Default Re: My amp dims.... (not protection mode)

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Originally Posted by 97_eldo View Post
i would check the ground connection.....make sure it is clean....free of paint
try checking/watching the voltage at the amp while playing and see if there is any drop
how do I do that I forgot. Is it having the DMM on the ground and then on a positive lead?
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Old 03-28-2014   #4 (permalink)
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Default Re: My amp dims.... (not protection mode)

It dims because the circuit driving it is cheap. It happens. It's nothing wrong, usually. LED's are hyper sensitive to voltage change. So even .05V difference can make it dim. and dropping .1V is common.
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Default Re: My amp dims.... (not protection mode)

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Originally Posted by Based View Post
how do I do that I forgot. Is it having the DMM on the ground and then on a positive lead?
black from dmm to negative and red from dmm to positive

but it is likely just as blackdragonx1186 mentioned it may just be nothing to worry about
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