Just woundering why my subs are making a whining noise when they hit low bass but when there just playing with minmum bass there is no noise ? any suggestions!

maybe a grounding issue? maybe you don`t hear the noise cause its turned down. what ga cable do you run? more details please.

Well the amp is only im using 4 gauge the amp is 800watt rms so that should be fine rite?

do you hear any noise when you rev the car?

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My car stereo.... the never ending saga.....

Is there a stiffening capacitor in the system? Is your battery lead acid type? (with caps)
Check the voltage your amplifiers are getting when there's low bass at high level.

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E.C wuz here

No there is no capacitor should i need one and im not sher what kind of battery it is.

I'd recommend a stiffening capacitor for any system pushing over 500 watts total. (this will HELP the system, not cure the problem)
Ask your mechanic what type battery you have.

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E.C wuz here