pushing my sub too far?

[I'mPoor:(]

I got it all set up now I have a new problem. voltage stays 14-14.5 all the time. 2 12s at one ohm make my lights dim like they're hazards. I set the gains down a lot and it only made a difference at the point where I couldn't hear the bass... so I took one 12 out. running it 900rms at 2 ohms. used dmm for tuning. and I'm still having dimming. did I do something wrong? I got a quote from singer but it's gonna take me 2 or 3 months to get that money together so I'm trying to work around that for now

If it is quick heavy hits and not long notes when the dim happens, you dmm might not be able to keep up like the update speed so you are not seeing the vdrop.

 

[loudenuff]

if that's the case can that harm my amp? I think I might just get 2 low power rf subs and use my old amp until I get the money for the alternator.

 

[James Coyle]

1400 watts rms on a stock electrical system other than the big 3? That's a heavy load especially if it's an older car (usually indicates a smaller alt) with an older battery. What do you drive and what type of battery is it?

 

[loudenuff]

1400 watts rms on a stock electrical system other than the big 3? That's a heavy load especially if it's an older car (usually indicates a smaller alt) with an older battery. What do you drive and what type of battery is it?

I have a 99 grand prix with a duramax battery and stock 110 amp alternator

 

[Jeffdachef 5,000+ posts]

Go to an alternator shop and see if you can get it beefed up. You need to add a small battery like a kinetik hc600 to the rear. That obsidian should handle the power fine as long as you back the gain off when you start bottoming out.