I have 2 alpine type s 10" subs that are 200w @ 4 ohms. I have a RF (200m) amp that is mono at either 100W @ 4 ohm or 200w @ 2 ohm.(the subs are hooked up in parralel) I am having problems with the voltages in my car as my check engine light keeps coming on. I am not sure if the amp is set at 2 or 4 ohm... by doing the v=ir ohm's laws **** I am presuming it should be @ 4 ohm. is this right? and even then wouldn't the subs be running at 2 ohm?
Is my battery or alternator going?
or is it my setup?
PS I have a 2001 jetta GLS (2.0 litre one). If that helps.