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Car Audio experts, step inside....

  • Thread starter Thread starter 68keyblr
  • Start date Start date May 25, 2007

68keyblr

20+ Year Stangneter
Mar 17, 2003
946
20
49
Arizona
May 25, 2007
#1
  • May 25, 2007
  • #1
I have an Eclipse 4 channel amp with 2 6 x 9's on the package shelf and 6-1/4" round speakers in the kick panels.


I was driving down the road and I smell that unpleasent aroma of an electrical part burning up and suddenly my stereo freaks out and starts popping very loud and fast. So shut everything down, disconnect the power to the amp and finish driving home.

The next day, I hook power back up and turn the stereo on and everything works great. BUT - when I start the car, I now have a hum to the RPM of the engine through the stereo.

Is the amp blown, or is there a filter somewhere that could be blown? Where would the filter be located? I didn't install this audio system Plus, I don't know much about audio in general
 

iskwezm

10 Year Member
May 24, 2005
4,159
20
79
Rowland Heights,California
May 25, 2007
#2
  • May 25, 2007
  • #2
The popping noise sounds like a short but it sounds like one of the transformers/powersupplies in the amp took a dump in the amp

try bypassing the amp and see if the stereo does it by itself.
 

calpolymustang

Member
Feb 1, 2004
217
0
16
Santa Rosa, CA
May 25, 2007
#3
  • May 25, 2007
  • #3
i have a similar eclipse amp. you might check to make sure there arent any loose wires.

after you try iskwezm's idea, this this: try plugging in an ipod or discman with headphone jack into the preamp in. this requires a cord with head phone jack for the ipod on ine side, and red/white rca jacks on the other side for the amp input. you should be able to play your ipod through the amp. this allows you to see if the hum is from problems in the amp vs problems in the head unit

http://edifier.ca/eshop/images/L221MM-2.jpg
 

Psydwaze

Founding Member
Oct 10, 2001
661
0
16
Sacramento, CA
May 25, 2007
#4
  • May 25, 2007
  • #4
iskwezm said:
try bypassing the amp and see if the stereo does it by itself.
Click to expand...

Before doing that, unplug the signal cables from the deck to the amp. If the noise goes away its more than likely the deck and not the amp.
 

68keyblr

20+ Year Stangneter
Mar 17, 2003
946
20
49
Arizona
May 25, 2007
#5
  • May 25, 2007
  • #5
Thanks for the advice, I'm going to try all of these suggestions tonight to see if I can narrow it down
 

geostang351

Member
Mar 30, 2005
946
0
17
Danb., CT
May 29, 2007
#6
  • May 29, 2007
  • #6
Update?
 

68keyblr

20+ Year Stangneter
Mar 17, 2003
946
20
49
Arizona
May 29, 2007
#7
  • May 29, 2007
  • #7
Sorry I got sidetracked working on my '88....I'll try it tonight and report back!
 

iskwezm

10 Year Member
May 24, 2005
4,159
20
79
Rowland Heights,California
May 29, 2007
#8
  • May 29, 2007
  • #8
Just so you guys know, the headunit rarely gives off any type of interference type noise(unless something went bad internally).Usually the RCA cables getting interference are the main source of "a buzz" that gets amplified by the amp or a ground is bad.
 
R

RUSTYNUT

New Member
Mar 22, 2007
128
0
0
PDX
May 30, 2007
#9
  • May 30, 2007
  • #9
I would first look for what caused the burning smell. The rest won't matter if your car catches on fire. You should have blown a fuse before the smell got that strong. Sounds like an unprotected wire shorting out. I think the last time I used a noise filter it was installed in the power supply for the head unit. They are installed to take out alternater and ignition noise. If the stereo was installed by a place offering free install with purchase, I would look over the wires very carefully.
 

68keyblr

20+ Year Stangneter
Mar 17, 2003
946
20
49
Arizona
Jun 6, 2007
#10
  • Jun 6, 2007
  • #10
Bad Head Unit

I finally got around to driving the amp from my ipod and it was crystal clear with the engine running! Looks like the head unit must have blown something, which would explain that ozone smell.

My dad was a EE for Motorola for 30 years and he thinks that a capacitor took a dump. He said that nowadays manufacturers make electronic components barely above the expected power threshold, instead of double or triple above like they used to.

Anyhow, I'm going to try to make a warrantee claim on my pioneer head unit.

Thanks for all of the advice - you guys rock! :SNSign:
 

calpolymustang

Member
Feb 1, 2004
217
0
16
Santa Rosa, CA
Jun 6, 2007
#11
  • Jun 6, 2007
  • #11
He said that nowadays manufacturers make electronic components barely above the expected power threshold, instead of double or triple above like they used to.
Click to expand...

but I wouldn't say that the amps of today are built worse than the ones made way-back-when. Today, stereos use better power transistors, DSP (digital signal processing), and control systems in various parts of the device. Some of today's stereos can do more than what personal computers did ten years ago.

Hopefully the problem occured from a bad head unit and not from a bad connection in the wiring. If it failed inside the unit, its more likely it was from a manufacturing defect than from being under-engineered.
 

68keyblr

20+ Year Stangneter
Mar 17, 2003
946
20
49
Arizona
Jun 6, 2007
#12
  • Jun 6, 2007
  • #12
calpolymustang said:
but I wouldn't say that the amps of today are built worse than the ones made way-back-when. Today, stereos use better power transistors, DSP (digital signal processing), and control systems in various parts of the device. Some of today's stereos can do more than what personal computers did ten years ago.

Hopefully the problem occured from a bad head unit and not from a bad connection in the wiring. If it failed inside the unit, its more likely it was from a manufacturing defect than from being under-engineered.
Click to expand...

I got a good two years of use out of it so I'm guessing the failure is internal to the head unit. I'd think a wiring problem would have manifested sooner.
 

Z06killinSBF

Member
Apr 25, 2005
457
1
19
McKinney, TX
Jun 7, 2007
#13
  • Jun 7, 2007
  • #13
68keyblr said:
my pioneer head unit.
Click to expand...

There is your first problem. I think Pioneer and Sony both are very poorly made. JMHO
 

68keyblr

20+ Year Stangneter
Mar 17, 2003
946
20
49
Arizona
Jun 7, 2007
#14
  • Jun 7, 2007
  • #14
It's out of warranty so I need to get a new one. Any suggestions? I think it would be cool to get a 7" LCD flip out LCD screen DVD head unit
 

iskwezm

10 Year Member
May 24, 2005
4,159
20
79
Rowland Heights,California
Jun 7, 2007
#15
  • Jun 7, 2007
  • #15
Z06killinSBF said:
There is your first problem. I think Pioneer and Sony both are very poorly made. JMHO
Click to expand...
We deal with a lot of Pioneer and have very good luck with them,Sony on the other hand, i wouldnt touch, along with Alpine
 

calpolymustang

Member
Feb 1, 2004
217
0
16
Santa Rosa, CA
Jun 7, 2007
#16
  • Jun 7, 2007
  • #16
I ditched my head unit and just run the amp straight off my iPod. The audio isnt as good, since the analog output on the iPod is designed for head phones, but it still sounds good.

If you buy a deck with and iPod interface, then you will benefit from a digital signal and better audio quality.
 

iskwezm

10 Year Member
May 24, 2005
4,159
20
79
Rowland Heights,California
Jun 7, 2007
#17
  • Jun 7, 2007
  • #17
calpolymustang said:
I ditched my head unit and just run the amp straight off my iPod. The audio isnt as good, since the analog output on the iPod is designed for head phones, but it still sounds good.

If you run buy a deck with and iPod interface, then you will benefit from a digital signal and better audio quality.
Click to expand...
Why dont you buy a iPod cable with RCA ends(yes we make them).It will also charge your iPod too.

its the iC-RCA
http://www.pac-audio.com/products/productsCatagory.asp?mmSearch=iPod Integration
 

calpolymustang

Member
Feb 1, 2004
217
0
16
Santa Rosa, CA
Jun 7, 2007
#18
  • Jun 7, 2007
  • #18
Looks like only some of those wiring kits will transfer a digital signal to the deck. I believe some of the others are just sending analog signals to a CD-changer or AUX input

But if youre like me and have loud mufflers, you wont notice the difference when the cars racing a Camaro.
 

68keyblr

20+ Year Stangneter
Mar 17, 2003
946
20
49
Arizona
Jun 7, 2007
#19
  • Jun 7, 2007
  • #19
iskwezm said:
Why dont you buy a iPod cable with RCA ends(yes we make them).It will also charge your iPod too.

its the iC-RCA
http://www.pac-audio.com/products/productsCatagory.asp?mmSearch=iPod Integration
Click to expand...


This is exactly how I had the old deck set up. The sound was really good. For now, I've used the RCA cables to drive the amp directly so I can still listen to music until I get this sorted out. We're leaving at 6:00 am tomorrow for a car show a few hundred miles away
 

68keyblr

20+ Year Stangneter
Mar 17, 2003
946
20
49
Arizona
Jun 7, 2007
#20
  • Jun 7, 2007
  • #20
calpolymustang said:
Looks like only some of those wiring kits will transfer a digital signal to the deck. I believe some of the others are just sending analog signals to a CD-changer or AUX input

But if youre like me and have loud mufflers, you wont notice the difference when the cars racing a Camaro.
Click to expand...


very true...Flowmaster 40's can be LOUD! My ipod died a while back so I use my XV-6700 Pocket PC for my MP3 player now - I don't think anyone makes a digital interface in a head unit for a PocketPC device yet. So I guess I'm stuck with analog RCA input
 
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