Doms Stereo Thread

[Domsz06]

Dog,

You deleted your post. I'm runnin 0 gauge, 2 strands of it for the grounds. as well as the power. I mean I guess It could be.

one side of the grounds goes to one battery bank, the other side of the grounds goes to the other battery bank, and that's how I have it ground. Then the starter battery goes to the motor ground, as well as one of the other battery banks goes to the motor ground. One battery bank is only ground to batteries. I wonder if that's the problem.

[philwsailz]

Dog,

You deleted your post. I'm runnin 0 gauge, 2 strands of it for the grounds. as well as the power. I mean I guess It could be.

one side of the grounds goes to one battery bank, the other side of the grounds goes to the other battery bank, and that's how I have it ground. Then the starter battery goes to the motor ground, as well as one of the other battery banks goes to the motor ground. One battery bank is only ground to batteries. I wonder if that's the problem.

I have a hard time knowing for sure about your grounds, so let me ask the question: Are all of your batteris tied solidly to a common ground? All of them at the same place? I cannot picture humming or buzzing with nothing else turned on, but if you are backfeeding a ground connection through another component it might make for funny noises.

If you do not have all of your batteries tied together on the negative side, you NEED to do so.

[Domsz06]

all my batteries are tied together on the negative side yes. But not all of them together. Do I need to tie all 7 batteries together? There is only one ground on the boat, and all the batteries end up back to that yes, but not all of them are all tied together, three are tied together, then the other three are tied together then the ground then the one and to the ground.

[philwsailz]

all my batteries are tied together on the negative side yes. But not all of them together. Do I need to tie all 7 batteries together? There is only one ground on the boat, and all the batteries end up back to that yes, but not all of them are all tied together, three are tied together, then the other three are tied together then the ground then the one and to the ground.

hmmm... My answer to you is maybe. It will not mess anything up, and may cure your issue. With that many batteries, I would personally have a jumper from ground to ground tying all seven together, with as little wire as possible.

I know that weight distribution / balance / etc. all likely has played a part, and the seven batteries might be scattered. it will be tough, and you may actually have the best scenario already in place. Still, I have seen weird stuff, with circuits finding ground through some interesting paths, causing some very interesting and unwanted things to happen.

OH! Also, make sure that the radio is FOR SURE always connected, (positive and negative) to the same battery bank as the amplifiers. Things can get weird for example when the radio is getting power from say the starting battery while the amp(s) are getting their power from a dedicated house battery bank.

[Domsz06]

ok, well I'll look into all of this. and I may run an extra ground to the HU as well as the extra battery bank. I think I have some wire I can just jump it first, to see if that works, and then make it prett if need be if it works.

[dogbert]

ok, well I'll look into all of this. and I may run an extra ground to the HU as well as the extra battery bank. I think I have some wire I can just jump it first, to see if that works, and then make it prett if need be if it works.

My guess then is that it's your head unit not being on the same ground circuit as the rest of your system. I had that issue and I fixed it with one of those ground isolators. Given the size of your system, you may be better off grounding it all to the same ground circuit.

Also, didn't you say that you had a battery isolator installed? If so, is your head unit on the main boat battery and the rest of the system on your battery banks?

[Domsz06]

no no isolater.

The HU is just hooked up to what ever power wire came stock. I didn't change anything, just like the ground too. I'll ground the HU to the commen ground with the amps and see if that helps any.

[dogbert]

Ok, then that may be your problem. Mine was accentuated by the motor running, but you probably have so much power that it's showing up just sitting there.

[Domsz06]

but wouldn't you think all the speakers would make it?

[Domsz06]

NVS's are the ONLY one's making it.

[dogbert]

What's the connection from the amp driving the NVS's and the HU?

[Domsz06]

for the NVS's is goes HU, RCA, Equalizer, RCA to symlink converter, to digital equlizer, to symlink to amp to speakers. make sense?

[dogbert]

Could you switch out the amp connections for some other speakers between the digital equalizer and the amp to see if it does the same thing?

Geez, sounds like you're gonna need a patch panel.

[Domsz06]

yeah I can switch anything out, I'm just wanting to try my easy fixes first, ie grounds, then get complicated. I think its a ground, because I remember when anhaney was over, I had a bit of one, then it went away, so I would venture to say it's a ground, since they can be spotty at best. SO... I'll look at grounding issues first, then go complicated.

[Domsz06]

ok phil, dog and sp

Talked to duane and he has the EXACT same problem. He wonders if it's due to the sensitivity of the speakers. When his are off or no volume they hum, and as soon as you give them some juice it stops. HE mentioned something about a de-coupling. Here is what he said, any ideas? "Regarding the hum, I get that on mine too when the volume is virtually off. Too be honest I don’t know why unless it’s just because of the sensitivity of the speakers, but it really shouldn’t be there IMO. It’s probably a bit of a ground loop issue, may even be coming from the relay on the amp remote turn on line. I’m thinking a de-coupling capacitor at this location would be the test/solution but would need to consult an EE to determine the appropriate value."


Thanks guys.