Engine Noise due to ground loop or amp? - Page 2

LaxPlaya8513 · 02-25-2006, 01:07 AM

well, it's not really hard to check the continuity.....sorta odd....

matt11601 · 02-25-2006, 01:21 AM

It's been really frustrating bringing my car back to Circuit City time after time. Not to mention I don't have much faith in AADeals now. I really really really wish I could have returned it for my money back, but looks like I'll be stuck with a new amp for the time being.

Splash-X · 03-05-2006, 08:15 PM

Are you aware that if you paid by a credit card or debit card w/ visa/mc logo you can simply call up your bank/card company and tell them the merchandise arrived damaged. You had to buy one localy to save time and now the orginal company wont take the "defective" merchandise back. File a dispute claim saying you wish to return the item because it was defective and they wont allow it.

99.99999% of the time, no matter what the problem, your credit card company is going to award the dispute to you because they want you to be happy. Any company that takes credit cards is aware.

Trust me, just call them and file a dispute and give them the details. Tell them you just want a refund and they wont give it.

On a side note, the same applies to going out to eat. If you go to a resturant and you pay by credit card and you decide that the meal simply wasn't up to par (even after you paid for it) you can dispute the charge and you will win. Sounds stupid, but in their eyes the consumer is always right no matter how wrong they are. Any company that values their customers sees this and work with you to resolve any issues you may have.

matt11601 · 03-05-2006, 09:06 PM

I had no idea you could do that.

When I called them up they said it's company policy to not refund on Sony merchandise. The only thing they will do is an exchange for the same product which is what I ended up doing because I thought I was out of options.

I really wish I knew about this before I returned the broken amp.

Toastyfishands · 06-11-2007, 01:21 PM

I litterally just had the same problem about 20 minutes ago. Im not sure who installed my amp, because the car was a gift. who ever did didn't ground it properly, find where your amp is, follow the black ground wire to where ever it connects to the body of the car, remove that screw, where the connector makes contact, scratch it up so that there is metal to metal contact. most likely whoever installed the amp left the paint underneath the connection, and it is grounded, but not grounded properly.

I just did that to my ground, and it works perfectly now, no noise except for when the car starts up it sounds like a laser gun fight for about .3 seconds. i really wish it would last longer so i can figure out which side of the car wins.

boomintrac · 06-11-2007, 11:46 PM

Nothing like bringin a post back to life a year and a half later.
Aron

BRow86 · 06-12-2007, 08:42 AM

I have to say, after blowing one car battery and going through about $250 dollars worth of cables of all sizes, nuts, crimp terminals, etc. and then finally hooking up everything with a friend last night, I can say that it feels damn good when the thing finally DOES work and you did it yourself. I still don't know how I'm going to power my incoming system (1500rms + 150w carputer) but hey, nothing like figuring out how to do it right, ya know? As for cheap amps, I've been there, and I have to say that with car stereo stuff, you might as well do it right the first time because, in the end, replacing all the crappy stuff with cost more than trying to save money in the first place.

Toastyfishands · 06-12-2007, 12:02 PM

wow, i really didn't look at the date at all. go me

dcsmith · 01-20-2008, 04:29 PM

Quote: Originally Posted by Toastyfishands

wow, i really didn't look at the date at all. go me

I'm still reading it another year and a half later. I mean a half a year later.

matt11601 · 01-20-2008, 07:28 PM

Quote: Originally Posted by dcsmith

I'm still reading it another year and a half later. I mean a half a year later.

And I'm still subscribed to this thread after all this time.

It's funny going through this thread and looking back at my situation.

vs420michael · 04-07-2008, 11:43 AM

Quote: Originally Posted by matt11601

Like many of you, I need to install an amplifier before I can install my carPC. I had Circuit City install a cheap amp I got off eBay today and the guy told me that there's a lot of engine noise and he told me that the amp sucks.

First off, I know the amp sucks but it's a means to an end. But he was right about the engine noise, there's a lot of it. When I am not revving the engine, there's a very loud hum. When I rev the engine, the engine noise gets louder and is on top of the hum that's already there. Needless to say, I can drown out the engine noise by turning up the volume when listening to music.

When he told me that there's a lot of engine noise, he blamed it on the fact that the amp sucks. I always thought engine noise had to do with poor grounding of the amplifier. He also suggested I buy a better amplifier (from Circuit City of course) so that these problems won't happen.

So now I come to you guys for help. Is he right? Is it because the amp sucks? I don't think this is the problem because members here have bought cheap Pyramid amps for $20 off eBay.

Here's what I think. I think he did not ground properly and so I'm getting very loud engine noise. But he is blaming the engine noise on the amplifier.

What do you guys think? If the amp is to blame, then I'll just have to dip into my carPC money and buy a quality amp. But if the problem is due to his poor installion then I want to fix it myself.

Thanks.

-Matt

matt,ill tell u how to get rid of the noise.take the rca plugs out of the back of your radio.take a knife and cut off the first layer of plastic of the wire to exspose the shield of the rca,s.take a piece of wire 8 gauge or 10 doesnt matter and cut about 1inch or so of cover to exspose naked wire.wrap the wire around both left and right channel rca grounds that u have exsposed on the rca,s and then wrap electrical tape around them.take the other end of the wire that u havent used yet and cut a half of an inch of the skin off the end and put a donut spade on the end and take a screw out of the radio cover and put screw through the end of wire and put back in radio.now its grounded and the noise should be gone now.i did it to mine and it was gone.all amp components are made in china,so if one is junk then they all are.see ya

pdegameplayer · 05-06-2008, 11:51 AM

since this thread has been bumped alot i thought what the hell...

ok my problem is that i have a rockford fosgate p3002 amp now when i had installed in my friends saturn it had no engine hum now when i installed it in my car i get a stupid annoying engine hum and i know for a fact is not the amp i have a full shielded rca cable with a ground and all's good with that and i have a good ground connect anybody got an answer?

pdegameplayer · 05-06-2008, 12:34 PM

sry it double posted

dopey273 · 05-07-2008, 12:39 AM

what headunit, are the pwer and signal wires ran on opposite sides, where is the gain set, is it maxed out. Also is the amplifier screwed down to a piece of wood or did you screw it through the floor into the metal?

pdegameplayer · 05-07-2008, 08:18 AM

Quote: Originally Posted by dopey273

what headunit, are the pwer and signal wires ran on opposite sides, where is the gain set, is it maxed out. Also is the amplifier screwed down to a piece of wood or did you screw it through the floor into the metal?

auctually i found the problem it went a little deeper than the grounding loops and power problems i took off the cover of the amp some how it crouded inside the amp i took a steel brush and got all the crousion off the components and it works fine now, also my amp is just loose in my trunk because i hate to screw it down because its not mine its on loan!

btw i have the gain all the way up but that should make no diff on this amp its solid! and i have a 1/0 Awg cable for both the power and the ground and the signal wires are run down the center of my car and the power is run down the side so no cross talk there i fully believe that my problem was the crousion on the board!

thanks for your help...

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