ohm's and amp noise

[slickstang92]

i bought a hifonics ZRX 1000.4 and set up all my speakers around it to be at 2-ohm so i got it done hooked it up had no headunit at the time so i just connected my ipod to the amp just to see if everything was working and it was just fine but when i connected the headunit the amp keeps making all kinds of really loud like noises when i turn the key on and even when the headunit is on standby and only does it when the rca's are connected to the h/u i can't figure out why it's doing it.

does anyone know whats going on and can help me also if i did something stupid please tell me i'm not new to car stereo's but first time i've redone a whole car.

Thanks

anyone who read before editing i was wrong about the amp stability and my wiring they are at 2-ohm

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[TaylorFade 10+ year member]

If it doesn't make those noises while connected to your iPod... that kinda narrows it down, doesn't it?

 

[Chevy Blazin' 10+ year member]

headunit

 

[slickstang92]

Sorry i forgot something i tested but first no they were different rca for ipod and h/u but i tried a different amp with same rca and h/u and last summer when i first got the amp and speakers in im alpine h/u did the same thing but i i thought it was the h/u because i tried a different one that worked fine it was a kenwood.

on other thing my friend did a kenwwod hifaonics 4 channel set up and had the same problem i don't think he ever fixed his tho i don't know i f this matters but when i tested with the other kenwood last summer the h/u was not powered by the car i used a jumpbox at the time because i still had the alpine harness in

 

[TaylorFade 10+ year member]

Reading one post with no punctuation is all I can take.

I'm out.