Thread: Anyone else have this happen?

I have two 12 inch Polk Audio subs, along with a 1600 watt amp.
I was curious if other people have this happen, when the bass hits hard on the sub woofer, for example when the volume is maybe 1/2 on the head unit, my inside dome lights dim almost all the way down, and my head lights dim a lot also.

Time for a new alternator?
what do you think?

Sounds like you need a big capacitor or an extra battery in the mix

Head unit: Sony CDX GT34W - radio / CD / MP3 player - In-dash car stereos - CNET Archive
Amp: PowerBass Autosound ASA 600.4x 4-Channel A/B Amplifier | PowerBass USA
Subs: db212-2 Car Subwoofer from Polk Audio
The power is hooked up to the fuse relay. On the left side of the car is the power, remote, and ground. The right side is the rca cord.
Wired with a Kicker amp kit.
The ground is hooked up to a bare metal part under the rear seat.

Move the power to the battery and get an alt rewire for the underwood relay center. Should help a tad. You'll still need a cap or extra battery I think though

Kicker - D-Series Amplifier Installation Kit - 09DPK4 theres the kit. i had to get the kicker rca seperate - Kicker - Z-Series 9.9' 2-Channel RCA Audio Cable - 09ZI23
And i have a new 80amp inline fuse. (i broke the one that came with it...
And what do you mean Alt rewire?

Upgrade the stock 8 gauge alternator wire to a 4 gauge. It'll help dramatically.

that's the one from the battery to the fuse relay right?

ZZPerformance - Alternator Power Cable #ZZ-APC

well that's certainly a cheap enough place to start i will check it out and keep updated

Basically get a piece of 4 gauge wiring about 24-30 inches long. Wire it to the alternator output terminal and to the positive battery post. The factory 8 gauge wire for the alternator will stay in place. The factory wire runs half way around the damn car and is too small to power the car, let alone subs.

If I try to dim my lights after doing this upgrade I can, but typically I don't turn mine up that loud. Getting too old for that I guess. LOL

cool i will start with an alt rewire and then if that doesnt solve everthing i will move on to rewiring.

Or rebuild the one you have with this:

Wholesale Alternator Parts - Starter Parts - Alternator & Starter Repair kits - HIGH OUTPUT ALTERNATOR KIT-DR CS130D 220A

Run more wire to the amp first.

One four gauge run isnt enough from my limited experience.

That amp might draw over 1.6 kW, which is quite a bit for a single run of 4.