Had Pioneer Head unit (DEH7500), infinity speakers and Xtant amp installed in my car; when stereo is is turned on there is a hum/buzz/electronic interference from the ignition coming thru the speakers. All wiring high quality, completed with professional intallation who has done many such setups on Honda S2000 cars without problems.... Please any suggestions for troubleshooting or ideas on what the problem is. Thanks very much!

 

is it from the ignition or the alternator? i'm willing to bet the alternator.

if you had it professionally installed, bring it back.

if you want to do some personal checking first... check your grounds.

i can give you a better troubleshooting suggestion list if you want it... but you paid for your install, and it hasn't been done right (unless this just started). i'd bring it back and insist they make it right.

 

Hello, my name is mister ground noise.

Check to see if......

Your ground cable isnt to long
You ground is on a STOCK honda ground......gold bolts with a crapload of black wires going to them.....

If you STILL have the noise.....youll need to rewire your system properly.

Other than that, with Phil

 

Check the grounds...

 

Ground cables have been checked. The surface around the ground cable was sanded clear of paint so I dont think it is a ground issue. A friend mentioned that the main radio power cable connected to the battery might be an "antenna" for the electrical noise and suggested covering that cable with copper or some metal to keep out unwanted "noise".
Keep your suggestions coming please!
Thanks in advance.

 

You have a bad ground. 100%. 9.99 out of ten times I have encountered this its a bad ground. Sanding to bare metal doesnt always work. Put it to the honda ground and I guarantee itll go away. If it doesnt, your RCA's may be too close to the power.

Also, your ground wire should no exceed 4 feet, although 2 feet is ideal. Check the RCAs as well.

 

[quote]A friend mentioned that the main radio power cable connected to the battery might be an "antenna" for the electrical noise and suggested covering that cable with copper or some metal to keep out unwanted "noise".
[quote]
this sounds a bit far fetched.... this is something you check after you've ruled out a LOT of other possibilities. and even then, i'm thinking this isn't likely.

so, now we need to find out WHERE the noise is coming from... to do that, we need to diagnose the chain...

do each one of these in order, until you find a case where before there is noise, and after no noise.
-disconnect the RCA's from the amps. check for noise. reconnect RCA's.
-disconnect the RCA's from the head unit. check for noise. reconnect.
-connect a discman (using batteries, not a 12V adapter) to the RCA's at the head unit. check for noise. reconnect as normal.

after doing these, get back to me on which cases you had noise.

or, you could just bring it back to the shop who did the work....


also, more details on how things are setup, where wires are run, approximate lengths and locations of grounds, etc. would help.

 

Sounds like good advice. I get the speaker buzz only when engine is on.

I will post a reply to this link after everyone's suggestions are implemented.
Thanks very much!! In the meantime if you have any other ideas please send them.
An appointment has been made for friday feb. 27 and hopefully this willl be resolved. I will report back then.

 

keep us updated. and the alternator only runs when the engine is on... it generally is the source of these kinds of noise... (bad grounds or EMF bleed over usually allow the alternator's noise to come into the system.)


btw, do you have a volt meter or a passport 8500? it is always possible that your alternator is going out... but that would be much further down on my list of things to check... (right before shielding all the power cabling....)

 

[QUOTE]Originally posted by PJK3
keep us updated.