!#@#% amp just died.
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Joined: Feb 2000
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From: Sacramento CA
!#@#% amp just died.
I was doing some further tuning, and playing with polarity.
I decided to bypass the eq to see if it was causing my dip issues...
As soon as I plugged the amp in, i got loud crackling/humming.
It still amplifies... Verified issue is not the source.
Sigh... Next amp won't be an ARC.
There goes my Dynaudio money
I decided to bypass the eq to see if it was causing my dip issues...
As soon as I plugged the amp in, i got loud crackling/humming.
It still amplifies... Verified issue is not the source.
Sigh... Next amp won't be an ARC.
There goes my Dynaudio money
Thread Starter
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Joined: Feb 2000
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From: Sacramento CA
Any thoughts on the Eclipse Class D "ice" full range amps?
A 100x2 is only 300 bones.
not sure what to do about replacing... I want tiny amps.
http://www.eclipse-web.com/amp/xa2000.html
I tend to trust Eclipse...
Not sure about Memphis, they look nice on paper...
The Edesign amps are pretty huge...
A 100x2 is only 300 bones.
not sure what to do about replacing... I want tiny amps.
http://www.eclipse-web.com/amp/xa2000.html
I tend to trust Eclipse...
Not sure about Memphis, they look nice on paper...
The Edesign amps are pretty huge...
Last edited by Kale; Mar 3, 2007 at 02:22 AM.
Supporting Tuner
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From: ================== Houston, Texas www.englandgreen.com ================== Necessary Evil™ __________
CI 6-7-8-9-10 Veteran
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14
You are just not having much luck recently Kale. Hope the replacement is not too expensive.
EG
EG
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From: Sacramento CA
Do they sound as good as AB amps? Thats my only real concern.
Two 30 amp fuses on a 100x2 class d...
my 100x2 class A is two 20 amp fuses... and its less efficient.
Do you think these amps are underrated?
Orion also looks good... 125x2 for 240, but im skeptical because amps that list their max power rating on their body are usually junk. SNR is 77db, I know anything less than 90 is audible...
Last edited by Kale; Mar 3, 2007 at 11:26 AM.
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From: Sacramento CA
Wel ldid some more testing, maybe you have some insight....
If I plug head phones in to the RCA out on the head unit, NO noise
if i plug my ipod directly to the amp, NO noise.
The good news is the amp is probably ok.
The head unit is probably ok.
The RCAs are probably ok, i tried two different pairs.
The bad news is.. WTF is going on?
If I plug head phones in to the RCA out on the head unit, NO noise
if i plug my ipod directly to the amp, NO noise.
The good news is the amp is probably ok.
The head unit is probably ok.
The RCAs are probably ok, i tried two different pairs.
The bad news is.. WTF is going on?
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Thread Starter
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From: Sacramento CA
Update:
I connected amplified headphones directly to the RCA outs on the head unit, and i get a constant humming, even with the car OFF.
If I leave the RCAs connected to the amp, but NOT to the head unit, and turn the amp on, I get the same noise. (Some kind of interference?)
I connected amplified headphones directly to the RCA outs on the head unit, and i get a constant humming, even with the car OFF.
If I leave the RCAs connected to the amp, but NOT to the head unit, and turn the amp on, I get the same noise. (Some kind of interference?)
Le Mans Master
Joined: Jun 2004
Posts: 5,572
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From: Los Angeles Ca
so you only get noise when you plug the head unit into the amp? Is it a busted ground in your head unit? have you tried grounding the rca to the amp ground?
edit: nevermind, you posted before i hit submit.
I wouldn't be conserned about the amp humming *yet*. the amp may need a signal to behave (have heard of this before). I guess as a first line of defense i would try to ground the rca to the amp ground and see what you get
edit: nevermind, you posted before i hit submit.
I wouldn't be conserned about the amp humming *yet*. the amp may need a signal to behave (have heard of this before). I guess as a first line of defense i would try to ground the rca to the amp ground and see what you get
Last edited by scott_fx; Mar 3, 2007 at 12:33 PM.
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More info: If i turn the engine on, the right speaker SCREAMS.
That in combination with the fact I get the noise with or WITHOUT the head unit... So long as an RCA cable is ran...
So it smells like a ground issue.... but how could a ground go suddenly bad?
wait... I did move my ground to a new location the other day, I wonder....
Nope, that ground point is rock solid. WTF.
That in combination with the fact I get the noise with or WITHOUT the head unit... So long as an RCA cable is ran...
So it smells like a ground issue.... but how could a ground go suddenly bad?
wait... I did move my ground to a new location the other day, I wonder....
Nope, that ground point is rock solid. WTF.
Last edited by Kale; Mar 3, 2007 at 12:54 PM.
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OK, lets restart here with the newest info:
Situations:
Stereo connected as normal. (HU to RCAS, RCAS to amp)
REsult: Crackle
---
Stereo not connected to RCAs. RCAS still connected to amp:
Result: Crackle
---
Head phones connected directly to head unit.
Result: Crackle
---
Head unit connected with different RCAS ran down center of vehicle:
REsult: Craclke:
----
RCAs ran down center of vehicle, with ipod directly as source
result: No crackle
---
So, the only time i dont get crackle, is when the head unit is not plugged in AND when im not using the RCA run that goes down the left side of the car.
IF i used head unit and bypass rca run, I still get crackle.
(power is ran down the right side if anyone is curious)
So this must be a noise simply "present" in my electrical system. The ran RCAs act as antennae, the HEad unit acts as an antennae, but not the Stinger RCAS I ran down the center. and not the amp itself.
I am completely stumped.
When the car is on, it SCREAMS.
Situations:
Stereo connected as normal. (HU to RCAS, RCAS to amp)
REsult: Crackle
---
Stereo not connected to RCAs. RCAS still connected to amp:
Result: Crackle
---
Head phones connected directly to head unit.
Result: Crackle
---
Head unit connected with different RCAS ran down center of vehicle:
REsult: Craclke:
----
RCAs ran down center of vehicle, with ipod directly as source
result: No crackle
---
So, the only time i dont get crackle, is when the head unit is not plugged in AND when im not using the RCA run that goes down the left side of the car.
IF i used head unit and bypass rca run, I still get crackle.
(power is ran down the right side if anyone is curious)
So this must be a noise simply "present" in my electrical system. The ran RCAs act as antennae, the HEad unit acts as an antennae, but not the Stinger RCAS I ran down the center. and not the amp itself.
I am completely stumped.
When the car is on, it SCREAMS.
Last edited by Kale; Mar 3, 2007 at 01:16 PM.
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From: Sacramento CA
Le Mans Master
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From: Dyer IN
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u said when the new rcas were ran down the middle and u plugged the ipod in you got no noise correct?
i would try using those rca's plugging them into the headunit and running a small wire from the outer ring on the rca behind the radio to the radio ground and see if it eliminates the noise.
The headphones to headunit crackling tells me you have blown preouts on the radio, which possiably could have blown a ground on your amp but doubtful
i would try using those rca's plugging them into the headunit and running a small wire from the outer ring on the rca behind the radio to the radio ground and see if it eliminates the noise.
The headphones to headunit crackling tells me you have blown preouts on the radio, which possiably could have blown a ground on your amp but doubtful
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From: Sacramento CA
yeah, but if i plug in the IPOD to the RCAs i was using before, i still get the noise... with head unit removed from the car.
did i mention it screams when i start the car?
did i mention it screams when i start the car?
Last edited by Kale; Mar 3, 2007 at 01:44 PM.
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No, the radio is not even within 10 feet of the car, it's completely disconnected
But i'm still getting the noise when I turn on my amp, with those RCA's connected.
I think the noise from the radio is only a symptom and not the disease.
Tried a different amp, no change.
But i'm still getting the noise when I turn on my amp, with those RCA's connected.
I think the noise from the radio is only a symptom and not the disease.
Tried a different amp, no change.
Last edited by Kale; Mar 3, 2007 at 02:00 PM.