Speaker humm and hiss

[Omer Darshani]

Hi guys. I have a corsa opc /Vauxhall vxr2013. And I installed a pumpkin headunit, focal performance 165 v1 last editiom, an nvx vad 11005 amp. And 4 gauge wiring kit.

Power wires and RCAs run on different sides of the car,
For ground to the amp I sanded the body beneath the rear seatbelt bolt and screwed the bolt back on the cable. (Also made sure that it's good) Also gave the head unit a sperate ground trying to fix the problem, aslo tried different RCAs,

Now the problem is: I have this annoying humm and slight alternator hiss from the front focal's that goes away when I turn off the headlights or press the brakes. (The alternator hiss still stays a little).

If anyone has a clue. I'll greatly appreciate any help . I believe it has something to do with ground problem

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[dragon.breath 10+ year member]

Some quick tests can tell you what component are picking up the noise. Don’t unplug anything with the stereo on.
1. Unplug the rca cables from the amplifier. If the noise is gone, it is not the amplifier or speaker wires that are picking up the noise.
2. Reconnect the RCA to the amplifier and disconnect them from the head unit. Turn stereo on. If the noise is gone, it’s not the rca cables.
3. Reconnect every thing but hold the head unit in your hands out of the dash. If noise is gone, you have a radiated noise problem in your dash.

Once you figure out what piece is the problem you can figure out a fix.

 

[Mitchell Fosgate III]

Hissing sound from the speakers? Then the wiring is wrong to the speakers. Plus terminals, negative terminals. Are there added wires around or connecting to the speakers? Like electrical window wire switches going to the speakers with the radio speaker wires. There are grounding wires also. Lots of wires can cause hissing sounds coming from the speakers. Try putting a black ground wire to ground the speakers.

 

[AnthonyO 10+ year member]

Hissing sound from the speakers? Then the wiring is wrong to the speakers. Plus terminals, negative terminals. Are there added wires around or connecting to the speakers? Like electrical window wire switches going to the speakers with the radio speaker wires. There are grounding wires also. Lots of wires can cause hissing sounds coming from the speakers. Try putting a black ground wire to ground the speakers.

 

[AnthonyO 10+ year member]

Some quick tests can tell you what component are picking up the noise. Don’t unplug anything with the stereo on.
1. Unplug the rca cables from the amplifier. If the noise is gone, it is not the amplifier or speaker wires that are picking up the noise.
2. Reconnect the RCA to the amplifier and disconnect them from the head unit. Turn stereo on. If the noise is gone, it’s not the rca cables.
3. Reconnect every thing but hold the head unit in your hands out of the dash. If noise is gone, you have a radiated noise problem in your dash.

Once you figure out what piece is the problem you can figure out a fix.

Agreed

 

[Mitchell Fosgate III]

I've been around cars for a long time. When I was 16 years old, my dad let me drive his Toyota truck it was a stick shift. 5 gears. I drove that truck to the ground. 19 years then gone. But learning things the hard way or the correct way for some. On those trucks, taking apart a cassette means ruined radio already. But Toyotas were built to last. Today, I just borrow or look at My brother's new Ford Truck. 4 door truck. Big truck. Impossible.

I've been around cars and trucks my whole life. So considered experts in the business.

 

[AnthonyO 10+ year member]

I've been around cars for a long time. When I was 16 years old, my dad let me drive his Toyota truck it was a stick shift. 5 gears. I drove that truck to the ground. 19 years then gone. But learning things the hard way or the correct way for some. On those trucks, taking apart a cassette means ruined radio already. But Toyotas were built to last. Today, I just borrow or look at My brother's new Ford Truck. 4 door truck. Big truck. Impossible.

I've been around cars and trucks my whole life. So considered experts in the business.

WTF are you talking about? I think I lost 100 brain cells trying to read this.

 

[AnthonyO 10+ year member]

When I was 16, my girl friend used to give me a handjob in the front seat of my 1976 Buick Century. But it has nothing to do with the OP topic.

 

[spokey9 5,000+ posts]

When I was 16, my girl friend used to give me a handjob in the front seat of my 1976 Buick Century. But it has nothing to do with the OP topic.

So you're a handy j expert then

 

[spokey9 5,000+ posts]

Truth be told after watching several Aiwa commercials in my youth I became an mega-expert car radio magician from the knowledge contained in those 30 second clips

 

[AnthonyO 10+ year member]

I watch videos on YouTube. So I’m an expert.

 

[spokey9 5,000+ posts]

I watch videos on YouTube. So I’m an expert.

That's almost a doctorate buddy

 

[AnthonyO 10+ year member]

I've been around cars for a long time. When I was 16 years old, my dad let me drive his Toyota truck it was a stick shift. 5 gears. I drove that truck to the ground. 19 years then gone. But learning things the hard way or the correct way for some. On those trucks, taking apart a cassette means ruined radio already. But Toyotas were built to last. Today, I just borrow or look at My brother's new Ford Truck. 4 door truck. Big truck. Impossible.

I've been around cars and trucks my whole life. So considered experts in the business.

I just realized who this is. President Biden, is that you?