stereo question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

76bonanza · 12-03-2003, 09:37 AM

I have a alpine cd player and a 200 watt amp. My question is I have some wine or hiss in it.

What type of noise reducer should I use and on what power wire?

Thanks

crackajacka · 12-03-2003, 10:44 AM

i would think a filter on the actual power wire would be where to put it, i dont know about what kind of filter.

LOHRTBT · 12-03-2003, 11:09 AM

I think you should just fix the problem rather than hide it. You have a bad ground.

crackajacka · 12-03-2003, 11:20 AM

o yea lol, never thought of that. then whats up with when i roll the windows down i get radio reception interference and its only when im rolling em down or up(btw i got power windows)

Russell · 12-03-2003, 11:46 AM

Anything electronic will cause that kind of noise, you can buy alternator whine reducers at Radio Shack pretty cheap

gldevall · 12-03-2003, 01:09 PM

I agree with Dave. Fix your ground.

**old Rusty C10** · 12-03-2003, 01:36 PM

fix your gound and then go to radio shack go to a manager they almost know what therye talking about

76bonanza · 12-03-2003, 03:20 PM

What ground?? Also if I filter the power wire should it be on the amp or head unit? Also on the constant power or the switched power?

gldevall · 12-03-2003, 03:31 PM

The ground on either your radio or your amp, if you are using one. Motor noise is almost always caused by a poor ground somewhere. Also, if you are running an amp, make sure your rca's are running on the opposite side of the vehicle than your power wire. If they are running side by side this can cause noise too.

76bonanza · 12-03-2003, 05:56 PM

Yes I am running amp have them both grounded to the body dont know how better to ground. How about those ground loop isolators that goes between amp and head patch into the rcas???

gldevall · 12-03-2003, 06:02 PM

I've never used any filters. Did you remove all the paint from around where they are grounded? Maybe you need to ground them elsewhere.

phantom dually · 12-03-2003, 08:42 PM

Try a few things with the ground. If you have the amp screwed to metal of the truck pull the screws out and hold the amp off of all metal. Make sure it is all still hooked up and see if the sound goes away. If it does use a few plastic gromets and space the amp off the metal area just a 1/8" or so. If that is not it try a small length of wire and hold one end to the radio chassis and touch the other to the exposed jacket part of the RCA or even to a grounded part of the truck. Try this at the amp also. Grounds are very critical as said and alot of people never hook the ground wire up securely and the unit will pull a ground from the antenna wire instead. This could be a reason you are getting fuzzy reception also. Let us know!!

C-10volvo · 12-03-2003, 10:23 PM

i have my 500 watt harmon kardon amp grounded to the floor of the cab under the seat. i dont have any noise. my amp is under there aswell

crackajacka · 12-04-2003, 11:09 AM

ive got my amp grounded off on one of my seatbelt bolts and my radio is grounded off on the side of the cab where i stripped the paint with a wire brush and put a bolt there

76bonanza · 12-04-2003, 09:39 PM

couple new things it does not get louder with stereo volume. But does get load when I rev the engine or turn on the lights?

r0lf- · 12-04-2003, 11:08 PM

Its your ground, OR you could have the power near other electrical devices that are causing interference. Either way, reground it to the cab floor (I just reground my amp the other day and it got a MUCH better signal and sound) and trace the power wires to see if there is something that might cause such interference.

phantom dually · 12-04-2003, 11:21 PM

Did you try anything I suggested??

76bonanza · 12-04-2003, 11:45 PM

I will work on it this weekend to much work right now.

phantom dually · 12-04-2003, 11:52 PM

OK let us know!!

76bonanza · 12-07-2003, 11:58 AM

I am currently working on my grounds.

Couple of questions.

My front speakers are run off my head unit and rears off a depth charge 200 watt amp With the amp rcas unplugged my front speakers with my head on them make no noise at all. With the amp plugged up the rears make the nosie even at zero volume.

Should I assume then it is the amp and concentrate on it?

Moloko · 12-07-2003, 12:06 PM

Like the others have said, its your ground. I just installed a radio in my friends 81 C/10 and he has the same issue when he grounded it to a seat bolt. I grounded it to the seat belt bolt and problem solved.

76bonanza · 12-07-2003, 02:39 PM

Well I have grounded amp to seat belt blot same result.

In reference to my above question if it does not come out of my front speakers does that mean it is the amp?

gldevall · 12-07-2003, 02:43 PM

It could just be the amp. Is it a "cheap" amp? I had this problem once and it was the amp, it was a cheapy.

76bonanza · 12-07-2003, 05:29 PM

It is a depth charge amp dont think it is cheap.

Anyone ever use a ground loop isolator? Something about when a stereo is grounded at a different place than the amp you can get a ground loop?

Unpluged the atenna that did not help so it is not coming from attena.

Did all the sugestions so far amp is now grounded to seat belt stereo to firewall.

76bonanza · 12-07-2003, 05:57 PM

Also just eliminated the amp by muting it with a set of dead short rca plugs with the mute plugs in no whine. So either it is the rca wires a ground loop or the head unit not grounded.

12-03-2003, 09:37 AM	#1
76bonanza Senior Member Join Date: Mar 2003 Location: St robert Mo Posts: 2,001	stereo question I have a alpine cd player and a 200 watt amp. My question is I have some wine or hiss in it. What type of noise reducer should I use and on what power wire? Thanks __________________ 1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO

12-03-2003, 10:44 AM	#2
crackajacka Stylin Join Date: Sep 2001 Location: Tuttle, OK Posts: 620	i would think a filter on the actual power wire would be where to put it, i dont know about what kind of filter. __________________ Ive been traveling for some time, with my fishin pole and my bottle of shyne. Most Girls like finished products and just dont understand what a good addiction does for you http://www.paulwall.us/

12-03-2003, 11:09 AM	#3
LOHRTBT BeWarE tHe eViL CrAnkTOe! Join Date: Oct 2002 Location: Yukon, OK Posts: 3,605	I think you should just fix the problem rather than hide it. You have a bad ground. __________________ ~Dave~ You can call me Mike, Mike Oxlong - 1986 Chevy SWB - Stock for now - *1986 Chevy Custom SWB* *Stolen 6/26/05* - 1985 Chevy SWB SOLD - 1999 T/A Some mods www.cardomain.com/id/ramairdave AIM Screenname - Jester84

12-03-2003, 11:20 AM	#4
crackajacka Stylin Join Date: Sep 2001 Location: Tuttle, OK Posts: 620	o yea lol, never thought of that. then whats up with when i roll the windows down i get radio reception interference and its only when im rolling em down or up(btw i got power windows) __________________ Ive been traveling for some time, with my fishin pole and my bottle of shyne. Most Girls like finished products and just dont understand what a good addiction does for you http://www.paulwall.us/

12-03-2003, 11:46 AM	#5
Russell Professional Grade Join Date: May 2003 Location: Fort McMurray, Alberta Posts: 7,915	Anything electronic will cause that kind of noise, you can buy alternator whine reducers at Radio Shack pretty cheap __________________ 1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap)

12-03-2003, 01:09 PM	#6
gldevall Registered User Join Date: Mar 2003 Location: Walker, LA Posts: 2,925	I agree with Dave. Fix your ground. __________________ Gary -1986 SWB: lowered 4/6, SOLD!!! -Best 1/4 mile: 14.51 @ 91.01 MPH -2001 Pewter Tahoe, billet grill, Corsa Sport Cat-back, K&N FIPK SOLD!!! -2004 Z-71 Extended cab with a flowmaster, BDS 6.5", 3" BL, 35x12.5x18 Trail Grapplers on Pro-Comp 18x9 wheels

12-03-2003, 01:36 PM	#7
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,313	fix your gound and then go to radio shack go to a manager they almost know what therye talking about __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!

12-03-2003, 03:20 PM	#8
76bonanza Senior Member Join Date: Mar 2003 Location: St robert Mo Posts: 2,001	What ground?? Also if I filter the power wire should it be on the amp or head unit? Also on the constant power or the switched power? __________________ 1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO

12-03-2003, 03:31 PM	#9
gldevall Registered User Join Date: Mar 2003 Location: Walker, LA Posts: 2,925	The ground on either your radio or your amp, if you are using one. Motor noise is almost always caused by a poor ground somewhere. Also, if you are running an amp, make sure your rca's are running on the opposite side of the vehicle than your power wire. If they are running side by side this can cause noise too. __________________ Gary -1986 SWB: lowered 4/6, SOLD!!! -Best 1/4 mile: 14.51 @ 91.01 MPH -2001 Pewter Tahoe, billet grill, Corsa Sport Cat-back, K&N FIPK SOLD!!! -2004 Z-71 Extended cab with a flowmaster, BDS 6.5", 3" BL, 35x12.5x18 Trail Grapplers on Pro-Comp 18x9 wheels Last edited by gldevall; 12-03-2003 at 03:33 PM.

12-03-2003, 05:56 PM	#10
76bonanza Senior Member Join Date: Mar 2003 Location: St robert Mo Posts: 2,001	Yes I am running amp have them both grounded to the body dont know how better to ground. How about those ground loop isolators that goes between amp and head patch into the rcas??? __________________ 1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO

12-03-2003, 06:02 PM	#11
gldevall Registered User Join Date: Mar 2003 Location: Walker, LA Posts: 2,925	I've never used any filters. Did you remove all the paint from around where they are grounded? Maybe you need to ground them elsewhere. __________________ Gary -1986 SWB: lowered 4/6, SOLD!!! -Best 1/4 mile: 14.51 @ 91.01 MPH -2001 Pewter Tahoe, billet grill, Corsa Sport Cat-back, K&N FIPK SOLD!!! -2004 Z-71 Extended cab with a flowmaster, BDS 6.5", 3" BL, 35x12.5x18 Trail Grapplers on Pro-Comp 18x9 wheels

12-03-2003, 08:42 PM	#12
phantom dually Project92 SWB stepside Join Date: Feb 2003 Location: Louisville KY Posts: 4,792	Try a few things with the ground. If you have the amp screwed to metal of the truck pull the screws out and hold the amp off of all metal. Make sure it is all still hooked up and see if the sound goes away. If it does use a few plastic gromets and space the amp off the metal area just a 1/8" or so. If that is not it try a small length of wire and hold one end to the radio chassis and touch the other to the exposed jacket part of the RCA or even to a grounded part of the truck. Try this at the amp also. Grounds are very critical as said and alot of people never hook the ground wire up securely and the unit will pull a ground from the antenna wire instead. This could be a reason you are getting fuzzy reception also. Let us know!! __________________ 92 C1500 stepside 496 Stroker Competiton Engineering Ladder bars/QA1 coilovers. Dana 60 rear with 4.10 gear and posi. Bonspeed Palisade 20x12 in rear w/335/30/20 and 20x8.5 front w/245/40/20. 5/8 drop with Belltech springs/DJM spindles/drop shocks. WWS Progress thread http://67-72chevytrucks.com/vboard/s...d.php?t=140448

12-03-2003, 10:23 PM	#13
C-10volvo Registered User Join Date: May 2003 Location: Lake Oswego, Oregon Posts: 1,028	i have my 500 watt harmon kardon amp grounded to the floor of the cab under the seat. i dont have any noise. my amp is under there aswell __________________ Ken Morgan For fun: 1964 Volvo 122 For slow: 1984 Chevrolet C-10 For everything else: 1997 BMW M3

12-04-2003, 11:09 AM	#14
crackajacka Stylin Join Date: Sep 2001 Location: Tuttle, OK Posts: 620	ive got my amp grounded off on one of my seatbelt bolts and my radio is grounded off on the side of the cab where i stripped the paint with a wire brush and put a bolt there __________________ Ive been traveling for some time, with my fishin pole and my bottle of shyne. Most Girls like finished products and just dont understand what a good addiction does for you http://www.paulwall.us/

12-04-2003, 09:39 PM	#15
76bonanza Senior Member Join Date: Mar 2003 Location: St robert Mo Posts: 2,001	couple new things it does not get louder with stereo volume. But does get load when I rev the engine or turn on the lights? __________________ 1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO



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12-04-2003, 11:08 PM	#16
r0lf- Hotwheels? Join Date: Dec 2002 Location: Pleasant Hill, CA Posts: 1,145	Its your ground, OR you could have the power near other electrical devices that are causing interference. Either way, reground it to the cab floor (I just reground my amp the other day and it got a MUCH better signal and sound) and trace the power wires to see if there is something that might cause such interference. __________________ 1978 Money Pit - CUSTOM DELUXE!!!!

12-04-2003, 11:21 PM	#17
phantom dually Project92 SWB stepside Join Date: Feb 2003 Location: Louisville KY Posts: 4,792	Did you try anything I suggested?? __________________ 92 C1500 stepside 496 Stroker Competiton Engineering Ladder bars/QA1 coilovers. Dana 60 rear with 4.10 gear and posi. Bonspeed Palisade 20x12 in rear w/335/30/20 and 20x8.5 front w/245/40/20. 5/8 drop with Belltech springs/DJM spindles/drop shocks. WWS Progress thread http://67-72chevytrucks.com/vboard/s...d.php?t=140448

12-04-2003, 11:45 PM	#18
76bonanza Senior Member Join Date: Mar 2003 Location: St robert Mo Posts: 2,001	I will work on it this weekend to much work right now. __________________ 1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO

12-04-2003, 11:52 PM	#19
phantom dually Project92 SWB stepside Join Date: Feb 2003 Location: Louisville KY Posts: 4,792	OK let us know!! __________________ 92 C1500 stepside 496 Stroker Competiton Engineering Ladder bars/QA1 coilovers. Dana 60 rear with 4.10 gear and posi. Bonspeed Palisade 20x12 in rear w/335/30/20 and 20x8.5 front w/245/40/20. 5/8 drop with Belltech springs/DJM spindles/drop shocks. WWS Progress thread http://67-72chevytrucks.com/vboard/s...d.php?t=140448

12-07-2003, 11:58 AM	#20
76bonanza Senior Member Join Date: Mar 2003 Location: St robert Mo Posts: 2,001	I am currently working on my grounds. Couple of questions. My front speakers are run off my head unit and rears off a depth charge 200 watt amp With the amp rcas unplugged my front speakers with my head on them make no noise at all. With the amp plugged up the rears make the nosie even at zero volume. Should I assume then it is the amp and concentrate on it? __________________ 1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO

12-07-2003, 12:06 PM	#21
Moloko Hoarding Rusty Objects Join Date: Aug 2002 Location: Slatington, PA Posts: 267	Like the others have said, its your ground. I just installed a radio in my friends 81 C/10 and he has the same issue when he grounded it to a seat bolt. I grounded it to the seat belt bolt and problem solved. __________________ 1985 Chevrolet K20 Silverado 1994 GMC Yukon Follow me on Youtube! - http://www.youtube.com/user/FuelInjectionSucks

12-07-2003, 02:39 PM	#22
76bonanza Senior Member Join Date: Mar 2003 Location: St robert Mo Posts: 2,001	Well I have grounded amp to seat belt blot same result. In reference to my above question if it does not come out of my front speakers does that mean it is the amp? __________________ 1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO

12-07-2003, 02:43 PM	#23
gldevall Registered User Join Date: Mar 2003 Location: Walker, LA Posts: 2,925	It could just be the amp. Is it a "cheap" amp? I had this problem once and it was the amp, it was a cheapy. __________________ Gary -1986 SWB: lowered 4/6, SOLD!!! -Best 1/4 mile: 14.51 @ 91.01 MPH -2001 Pewter Tahoe, billet grill, Corsa Sport Cat-back, K&N FIPK SOLD!!! -2004 Z-71 Extended cab with a flowmaster, BDS 6.5", 3" BL, 35x12.5x18 Trail Grapplers on Pro-Comp 18x9 wheels

12-07-2003, 05:29 PM	#24
76bonanza Senior Member Join Date: Mar 2003 Location: St robert Mo Posts: 2,001	It is a depth charge amp dont think it is cheap. Anyone ever use a ground loop isolator? Something about when a stereo is grounded at a different place than the amp you can get a ground loop? Unpluged the atenna that did not help so it is not coming from attena. Did all the sugestions so far amp is now grounded to seat belt stereo to firewall. __________________ 1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO

12-07-2003, 05:57 PM	#25
76bonanza Senior Member Join Date: Mar 2003 Location: St robert Mo Posts: 2,001	Also just eliminated the amp by muting it with a set of dead short rca plugs with the mute plugs in no whine. So either it is the rca wires a ground loop or the head unit not grounded. __________________ 1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO

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