amp/speaker problemhigh pitch/smoking

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=115648
Printed Date: May 18, 2024 at 8:14 PM

Topic: amp/speaker problemhigh pitch/smoking

Posted By: bumpinmymusic
Subject: amp/speaker problemhigh pitch/smoking
Date Posted: August 14, 2009 at 10:53 AM

I have a JL e4300 4 channel amp that I recently installed 2 6x9's Infinity Kappa on.....the one speaker played just fine and the other one has a high pitched sound that came from it and started to briefly smoke from the coaxil tweeter area.... I tried adjusting the amp and no help...
What would cause this? Has anyone experienced this before? Bad amp channel/ bad speaker?

I have the amp grounded in the same place as my sub amp and its using the same remote wire, 12V is coming from a distributor block...

Thanks

Replies:

Posted By: eric21
Date Posted: August 14, 2009 at 1:00 PM

My infinity kappa 6x9's did the same thing (the smoking), but this was the 12 years ago model. They kept playing for a while if I remember corectly. I think I was over powering them with 125watts per.

Posted By: DYohn
Date Posted: August 14, 2009 at 2:34 PM

Congratulations you blew the speaker. That amp will produce 110 watts into 2-ohms, and I am willing to bet you accelerated the failure with bad clipping by having the gain too high.

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Posted By: i am an idiot
Date Posted: August 14, 2009 at 6:56 PM

Disconnect all speakers from the amp. Turn the volume all the way down on your radio. With a meter set to AC Volts, touch and hold the black meter lead to the speaker negative connection. Touch the red lead to the speaker positive terminal. Notice the voltage reading. Check the other channels in the same manner. If one channel reads a higher voltage than the other channel(s), the one with the higher voltage has a problem. DO NOT CONNECT another speaker to it until you get the amp repaired.

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Let's Go Brandon Brown. Congratulations on your first Xfinity Series Win. LGBFJB

Posted By: DYohn
Date Posted: August 15, 2009 at 10:32 AM

Yes, Or your amp is defective.

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Posted By: bumpinmymusic
Date Posted: August 15, 2009 at 10:42 AM

i am an idiot wrote:

Disconnect all speakers from the amp. Turn the volume all the way down on your radio. With a meter set to AC Volts, touch and hold the black meter lead to the speaker negative connection. Touch the red lead to the speaker positive terminal. Notice the voltage reading. Check the other channels in the same manner. If one channel reads a higher voltage than the other channel(s), the one with the higher voltage has a problem. DO NOT CONNECT another speaker to it until you get the amp repaired.

thanks. I'm going to check that today. I had all the dials turned all the way down as I always do on my initial install. I just got a high pitch and soon after a brief smoke coming from speaker.

Posted By: i am an idiot
Date Posted: August 15, 2009 at 6:16 PM

If he has a grounded Non Bridged speaker wire, it could cause the amp to oscillate. If he removes all speaker wires and has AC voltage on only one channel of the amp. There is a problem with the amp. However if there is no AC voltage on either channel of the amp, we need to investigate further. If there is no voltage on either wire, you need to check the resistance between each speaker wire and ground of the vehicle.

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Let's Go Brandon Brown. Congratulations on your first Xfinity Series Win. LGBFJB