Amp question

[DmcnKng90]

so today i was bored so i hooked up my 300 watt jensen amp to my 2 rear speakers 250 watt max each so everything was hooked up correctly sounded fine with the car off but once i turned on the car the speakers gave off a very loud whinning sound and if i pushed on the gas it would get even louder...... what could be the reason for the whinning?
TIA

[nine_deuce]

That whine is alternator noise. Its either a bad ground, or your rca cables might need replaced. Check those and that SHOULD fix your problem

[H22WAGON93]

Make your ground short and make sure it a good solid ground. Run rca and power on opposite sides of the car.

[hybrid90accord]

what type of headunit r u runnong?

[DmcnKng90]

what type of headunit r u runnong?

pioneer idk the exact name of it but its only a few months old its prob my rca's there non brand name and they just look cheap and my rca cable and my power line are on the same side so im gonna have to switch one over

[hybrid90accord]

pioneer are known for having bad internal grounds/ in teh circuit board which draws in engine noise threw the rca pre-out. if you try to identify and isolate the noise source and if its not the ground, or rca wires it might just be the headunit or amp. try running rcas from another source into teh amp and see if u still get noise.

[mak]

Actually, it's not 'internal grounds', it's an internal fuse on the RCA pre-out ground that tens to blow easily, but you were close.

The easiest way to resolve this is the slit the shielding on your RCA cables (both sides) CAREFULLY, so that you only go through the plastic/rubber shielding and not through the wire inside of it, then wrap a wire around the now exposed wire, solder or tape it up and ground the wire you just soldered/taped to the chassis of the stereo.

Another option is a ground loop isolator, those can often resolve the issue so long as you ground the ground loop isolator to the stereo's chassis.

-mak

[hybrid90accord]

Actually, it's not 'internal grounds', it's an internal fuse on the RCA pre-out ground that tens to blow easily, but you were close.

The easiest way to resolve this is the slit the shielding on your RCA cables (both sides) CAREFULLY, so that you only go through the plastic/rubber shielding and not through the wire inside of it, then wrap a wire around the now exposed wire, solder or tape it up and ground the wire you just soldered/taped to the chassis of the stereo.

Another option is a ground loop isolator, those can often resolve the issue so long as you ground the ground loop isolator to the stereo's chassis.

-mak

no it is a ground coming off the main circuit board. i worked at a pioneer service center for 6 months. Trust me its a ground in board that is more common then a fuse. That and the ribbon cable are the most

[loud92CB7]

rca's dont have fuses...... its a bad soder on the main board as stated. but this problem can also be from a shitty ground to the amp itself. dont use a seatbolt. take sandpaper and get to some bare shiny metal and screw the ground there..... just make sure its not a gas tank.... lol