dimming? adding a sub?

[deano17 10+ year member]

I have a kicker CVR 12" sub running off a kicker zx750.1 wired at 4 ohms with the gains half way up. Electrical system is the stock in a 99 nissan altima besides the deka battery. The battery is probably a low end deka because it was just meant to be for the stock car when it was replaced. Anyway I was listening to it with the volume at 50/62 and I was getting dimming. The subwoofer volume control on the pioneer headunit was also at +6. No bass boost on the amp or HU. Is this just from my electrical system being crappy or is it because i used the +6 volume setting on the HU or something? It's not that bad and I can deal but it brings me to my next question...

I am looking to get another CVR and wire them to 2 ohms. At the moment the sub is probably seeing 400 watts from the amp. If I add another it will be about 800 watts. Will the dimming get much worse if I do get a second sub?

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[terra 5,000+ posts]

have you done the big 3?

 

[dman4486 5,000+ posts]

you need to set the gain correctly with the sub control on the hu at 0....check "gain setting tutorial"

 

[deano17 10+ year member]

no big 3. shouldn't i not need it for such a low amount of wattage?

 

[dman4486 5,000+ posts]

no big 3. shouldn't i not need it for such a low amount of wattage?

depends on what your stock wiring consists of