Sub goes with beat of motor????

[MG's VH Wag]

Hi all, I have intalled my sound system into my VR and i have just been listening to it when the car is turned off. Anyway i turned the car on and went to listen to some music then when my sub came on and before i put a song on the sub was making bass with the beat of my motor lol. Do i need to get some beefier RCA cables to stop interferance or do i have another problem?

Cheers!

[SAV_117]

are your RCA's running down the same side as your power

[bpottz]

yeah rca's are most likely picking up engine noise, if they are running down the same side as the power, run it on the other side

[MG's VH Wag]

Well the RCA's are running down the middle and the power is running down the drivers side. But they meet at the back seat

[daron]

bad earth or crap power suply doubt its rcas
check amp power and earth

[MG's VH Wag]

Ok i will check over all those my earth etc. I might buy some more insulated RCA wire anyway.

[StoneX]

What brand head unit? Are the speakers running from the head unit or an amp? Do they do it too?

[MG's VH Wag]

Its a pioneer head unit basic model only about a year old. The speakers are connected to the head unit and no they don't do it they work fine its just the sub. When i rev the car the bass gets louder so it is in sinc with the motor.

[trentvy]

does the bass whur when your in reverse just like the car?? lol

[MG's VH Wag]

I have only listened to it when the car is in park

[trentvy]

twas a joke dude sorry

[MG's VH Wag]

Hahah i thought it was a joke but i wasn't sure so i pretended it wasn't so i didnt seem stupid lol.

[StoneX]

It's probably the head unit. They have an internal fuse on the RCA ground track which blows and causes your exact fault.

[MG's VH Wag]

It's probably the head unit. They have an internal fuse on the RCA ground track which blows and causes your exact fault.

Is there any way that i can fix it?

[StoneX]

If you want to be dodgy (or to even just test if that's the problem), you can get a bit of wire and link it from the head unit's chassis to the outer ring of the RCA socket on the back of the head unit... How you attach it to make good contact is up to you

It'd be best to get it fixed by Pioneer though.

[SAV_117]

generally rcas and power need to be 50mm apart if there not the power cord induces a voltage into the rca electromagnetic stuff blah blah anyway 50mm if there together thats your prob if not like daron said earths if thats not it get some filters

[kopper69]

Try disconnecting the RCA's at the amp and see if the problem is still there. If it is, the signal is coming through the RCA's and you know the problem is going to be with the head unit or RCA's. If the problem still exists you know it is going to be with the amp or amp wiring.

[MG's VH Wag]

Ok cool thanks for the help guys, i will try all those things tomorrow and see if i can figure out the exact problem. I'll let yous all know how i go.

Cheers

[MG's VH Wag]

I just went out and tested then. I moved the positive and RCA's apart and the problem was still there, I unplugged the RCA's and the problem wasn't there. Does this mean its either the RCA's or my head unit or something else?

Cheers

[StoneX]

Do this...

if you want to be dodgy (or to even just test if that's the problem), you can get a bit of wire and link it from the head unit's chassis to the outer ring of the rca socket on the back of the head unit... How you attach it to make good contact is up to you

it'd be best to get it fixed by pioneer though.

[MG's VH Wag]

OK i will try that tomorrow, which rca do i attach the wire from the head unit chassis onto? The white or red rca socket? Also can i attach the wire to the heatsink at the back of the head unit or does it have to be the chassis?

Cheers

[StoneX]

Either RCA as the outer ring on all of them is just meant to be ground anyway. Yeah, the heatsink is fine as it's screwed to the chassis.

[MG's VH Wag]

Ok thanks mate! thanks for the help, i will try it today and let you know what happens.

[MG's VH Wag]

I connected a wire from the chassis of the head unit to the outer ring on the black RCA and it didn't fix the problem, it is still the same but it also has a whine to it. Does this mean that it is in my RCA wires? Do i need thicker ones?

[MG's VH Wag]

I just played some music with my car going but no sub connected and the rear speakers make a whine and crackle with the car. So i'm thinking that i really need to insulate the wires that run along the bottom of the car from the front.