Anyone have this issue????

[Durham Racing]

alright so i put a new cd player in my truck and this is what happens: [] head unit
6.5 O-----l--l------O 6.5
l center


6x9 O---------------O 6x9

O sub

when balanced my front right 6.5 goes crazy and starts to squeak
andmy back right 6x9 doesn't play at all it does is just squeak. if i fade the sound to the front both 6.5's play fine you can crank them as loud as you want and neither squeak. and if i distribute all the power to front right 6.5.... or either of the left speakers there isnt any squeaking but when i go to balance the sound in middle (balance-0 and fad-0) my FR 6.5 squeaks. so whats wrong?
left side sounds fine no matter were the sound is distributed.

heres what i dont get:

A. why wont my BR 6x9 play at all (I have swapt the 6x9's and nothing changed)

B. why does my FR 6.5 squeak when the sound is balanced but doesn't squeak when faded to the front or when all the power is to that speaker?

 

[Durham Racing]

Oh and the deck I installed was used but worked fine before it was removed.
and my speakers are give or take 11 months old

 

[RangerFabWorks]

got a speaker wire pinched, or grounded out somewhere. recheck all the connections on the back of the radio, and on the back of the speakers, then check so make sure you dont have a pinched wire somewhere.

 

[Durham Racing]

thanks
ill look