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08 TrailblazerSS
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608 Posts
Discussion Starter #1
I just had a complete new sound system put in the truck and now I am noticing the head and interior lights dimming a little when the it is turned up and the bass hits. I have two amps (one 350 and one 300) that split off of one 4 awg (I believe) fed into a distro block. Do you think I need to upgrade the battery cables or is it something else? Thanks.
 

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stupid white guy
TrailblazerSS
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4,887 Posts
It's not anything else.

You can start by doing a big-three upgrade. It will help alot. Search google for "TBSSowners.com big three upgrade" and you'll find it.

Start there first.
 

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08 TBSS awd
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394 Posts
what papabear said, big 3 and if your batterys at its end obv go with a better battery. your system isnt HUGE so i'd doubt needing anything more then that.
 

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WANNABE SS OWNER
Trailblazer SS 2wd
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Aaahhhhh, to be young again.
 

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07 TrailblazerSS Imp
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9,449 Posts
It's not anything else.

You can start by doing a big-three upgrade. It will help alot. Search google for "TBSSowners.com big three upgrade" and you'll find it.

Start there first.
:iamwithstupid: And maybe install a "cap" inline to hold current for the peak power hits from your system.
 

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Garage Queen
TrailblazerSS
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2,055 Posts
yup.. big three will help.. but doesnt completely solve the issue... i have the big 3 +2 option and when my bass hits, i still dim and drop to 11.2V all the way from 13.4V.. but i have a much bigger system then the 300 watt amps you have...

but the big 3 helps overall, even with the the slow power windows of the trailblazer platform SS and non SS
 

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08 TBSS awd
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394 Posts
I have new alt battery and the big three kit and my lights still dim just the same
High amp alt? how many watts is your system? May want/need a second battery.

The adding a cap idea is good IMO as long as your not needing a monster of a capacitor since then it becomes the same price to run a second battery.
 

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Premium Member
TrailblazerSS
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1,317 Posts
Start off with the big 3, if it still continues look into replacing the battery under the hood.

And do NOT add a cap, they are useless.
 

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08 TBSS awd
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i love the capacitor debate. If you have a big system i'll agree they are pretty useless, but if your just getting a minor light dimming it can help solve the problem. i havent ran one in years but back in high school (theres the problem right there lol) i had 2 15s (on a die hard gold battery and stock alt) and my headlights would almost shut off with hard bass hits and a single 2 farad cap kept the lights running normal again.
 

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2007 Trailblazer SS
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79 Posts
Start off with the big 3, if it still continues look into replacing the battery under the hood.

And do NOT add a cap, they are useless.
I agree with bizzle start with big 3 and then go from there. Caps r a waste. Been there had those. Ur better off getting a 2nd battery. It would b cheaper and much more effective

Sent from my HTC Vision using Tapatalk
 

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Premium Member
TrailblazerSS
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1,317 Posts
i love the capacitor debate. If you have a big system i'll agree they are pretty useless, but if your just getting a minor light dimming it can help solve the problem. i havent ran one in years but back in high school (theres the problem right there lol) i had 2 15s (on a die hard gold battery and stock alt) and my headlights would almost shut off with hard bass hits and a single 2 farad cap kept the lights running normal again.
Its no debate, its fact. Capacitors are more of a bandaid instead of an actual solution, but do as you please...

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If you end up swapping the battery, I'd go with a XS Power D3400. I replaced mine with that along with the big 3 and my voltage never dropped under 12.5~ with 1700watts or so...
 
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