Stereo & Electronics - speaker whining after install

i recently replaced all of my speakers but have one problem. when i accelerate the car my right rear speaker whines with the car. at an idle it is constant and as i go faster it gets louder. any idea how i can fix this. it is only coming from 1 speaker as when i unplug it it goes away. tried switching it with the other side and did not make a difference still whined.

are they stock speakers? if you did like aftermarket ones and ran them to an amp, could be your amp is not grounded well enough, or your rca's or speaker wires are picking up the engine noise. happened to me, i had to reground an amp, now it is almost unnoticable. think the noise is coming from my cheap rca's or speaker wire. if they are stock, maybe just however that one wire is ran it is on some metal and isnt very insulated and picking up noise.

the speakers are infinity reference and are wired directly to a kenwood head unit. everything is brand new and no wires are rubbing anything. checked about 5 times lol. so idk wah it is

check all grounds including under the hood. i.e. battery and alt. my aftermarket system was doing that too. i check everywhere and when i rewired the ground on the battery it went away.

What they said. Check all of your grounds, and then make sure your speaker wire you laid is not running next to any power carrying wire. Running powers next to signals is the best way to get whine.

so you bypassed the factory amp behind the spare? Check connection behind kenwood in that case, then unplug kenwood and plug it back in.

IF it is just one speaker, then you need to check the wires to that speaker. It's likely chafed somewhere. If all else fails, just run new speaker wire to it.