ground loop isolator?

I forgot to mention, im getting a buzz with a clicking noise when the key is turned on,  then that along with a whining noise when the engine is running. Heck, even when i turn the lights on with just the key on i get noise, engine running or not....All this is with the stereo either on OR off..... (BTW- ford powerstroke desiel 6.0)

Thanks for the link, I'll definatley check it out

LOL,  "Ive read the Pioneer qoutes in a few of your other posts"...But no, its actualy a JVC KW-XG700.  (Hear me out before you judge me,,I have a Ford F250 crewcab 4x4, desiel. with a Fosgate 600 mono- 2 Fosgate P2 10", a Infinity 375A  for the infinity kappa speakers).  I looked for a head unit with as many of the features I liked. It came down to an Alpine or a Kenwood but neither had all.  The JVC did,  though not a fan of JVC,  it was at a price i couldnt resist.....(next time i'll listen to my inner voice. LOL )  

I originaly had i just had  the deck powering speakers and the monoblock. No Noise, but no power either. I added a line driver when i added the 2nd amp and noticed the noise. (Yes loud enough for the car next to me to hear.)  I thought it was the line driver, but during the search i found that the deck was in fact making the noise when powering the speakers direct. It was just so low i couldnt hear it before im assuming.      Im planning on doing the continuity test tomorrow to start with. 

Ok, Im alittle confused.  "Idont need the line driver"??.... But when i had the head unit to the monoblock. I had very little bass unless i turned the gain and the boost knob all the way up.  With the line driver I have the gain up about 1/4 and dont even need the knob. The deck rates the RCA outputs at 2v, with the line driver its about 8v now. Huge difference.....what was I doing wrong before to get such low power?

So preform a continuity test at the line driver too?

Hmmm odd.  This is like learning car audio all over again (actually, i am) from the "old days'. I tried to give direct from the deck a 2nd chance and it had the same result as before - with the Gains maxed on both amps in order to get good sound.... With the cheap line driver( phoenix gold) my gains are set at about 1/4 with strong power.      As for the continuity tests, negative.....Both were below 1 ohm.... I put noise filters(groung loop isolators) at the live driver and no more noise.  Just a little upset that i had to add so many extras for such a simple install.  I have made my mind up that i'll ride out the JVC a few months and go back to Alpine.