subs cut out when brakes are applied

[cwatts2oo8]

my system works fine while driving, bumps like crazy and sounds good. but when i am slowing down and applying the brakes the subs cut out. no completely it just sounds very distorted or inverted in some way. what could cause this?

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[revrider1 5,000+ posts]

maybe some wires are getting caught up on the peddal?

 

[93dakota 10+ year member]

do ur RCA's cross the wire going to the brake lite at all.

 

[Louisiana_CRX 5,000+ posts]

what system do you have?

 

[cwatts2oo8]

i have a MA Audio Hk-1398 with two Infinity Kappa 12" Perfect Dvqs. they work so good while driving, but when braking it *****.. it cuts out during low bass..

 

[Sideways17 10+ year member]

How is the ground? Tight and short? Not flimsy or wiggling under braking?

RCA terminals on the amp solid? Not broken soldier of loose in any way? RCAs run on opposite side of power wire or sheilded from any factory wiring harnesses in the vehicle?

Sounds like something is barely making contact or an interference problem. Where is your amp mounted? Any unnecessary tension in power, remote, ground, RCAs of speaker wire? Check all crimped ends.

Hope this helps ya narrow something down.

 

[cwatts2oo8]

everything is solid.. the only thing is the grounds.. i couldnt find a good place to drill for grounds because i have an 88' camaro and the only place to mount the amps is on a metal hump a few inches above the gas tank. so the grounds are both sort of long. would it be bad to run the grounds back to the battery? is that too long? and what side would i run it on, the one with the power?

 

[undeadxsunshine 10+ year member]

Yeah you could go ahead and run a ground to the battery on same side as power, might help.

 

[cwatts2oo8]

i was told grounds must always be short, does it not matter if running straight to the battery?

 

[Savstyle 10+ year member]

i was told grounds must always be short, does it not matter if running straight to the battery?

itll be ok running it to the battery

Try it out and see if works

 

[I Like Waffle]

Could be teetering on the edge of low voltage. I know my engine RPMs drop and i lose about 1.5 volts when i apply the brakes. You could be around 12v when you apply the brakes and its throwing it below 11 and putting it in protect. Try applying the brakes with less volume and see if they cut off

 

[Shinju 10+ year member]

Who needs breaks!

Use the Hand break and drft around teh corners!

 

[dman4486 5,000+ posts]

I would shoot for either the bad ground scenario or the low voltage scenario. what is your voltage at idle(at the amp)?

I am assuming this is an automatic, so take this number while in gear and on the brakes.

 

[boltpride 10+ year member]

Who needs breaks!
Use the Hand break and drft around teh corners!

this

 

[iamamp3pimp 5,000+ posts]

fix the ground before you fry the amp....