audio gurus, I NEED help-- this one stumped even me...

[Jando86 10+ year member]

4 years ive been running my px300.4 JBL amp I've gone through thousands of $$$ in audio; this game is not new to me but I am open to learn.

amp:

4x125 @4 ohm

4x 170 @ 2 ohm

CEA rated.

today i went to install 2 ohm speakers in the rears. some 8 inch jbl coaxials i bought in the UK.

they sounded AWESOME for all of 1 minute, then all music cut out, a high pitched twisted squeal was heard, the the amp started to smoke by the RCAs. volume input did nothing. I killed the amp by turning the radio off. I thought the terminals might've shorted, but this was not the case as they were well wrapped in E-tape.

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i replaced the speakers with 4 ohm speakers and it worked fine again after the smokefest. Whats causing this if my amp IS 2 ohm stereo stable?

Click to read more...

 

[snoopdan 5,000+ posts]

It's a feature.

 

[Jando86 10+ year member]

//content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

 

[UpGradde 10+ year member]

maybe the 2 ohm speakers were bad? Did you check the ohms with a dmm?

 

[Decible_Demon]

hmmm... this happened to me with an audiobahn amp... my guess is you had the subs wired wrong.

Or you just popped a few things in your amp... but like mine.... it kept working

 

[Jando86 10+ year member]

no subs involved. speakers were brand new and i tested them before installing (2.5 ohm each DCR)

 

[Jando86 10+ year member]

someone who repairs amps told me some of the resistors might be partially fried and when the 2 ohm load is presented to the amp it can no longer handle it. this seems logical... thoughts?

 

[wesl56 10+ year member]

can u describe the smell of the smoke?

 

[Louisiana_CRX 5,000+ posts]

can u describe the smell of the smoke?

x2

 

[Pemrick69 10+ year member]

smelled like napalm in early morning.

lmao, how exactly is he supposed to describe the smell?

honestly, i'm curious.

 

[dman4486 5,000+ posts]

maybe the amp can't handle 2 different loads?

 

[KyleBechtold 5,000+ posts]

did you only have the 2 ohm speakers on it? and just 2 of them? that would make a one ohm load on the amp.. no bueno

 

[MakeshiftAudio 10+ year member]

Eh, it cutting out is interesting... I'm too tired to think at the moment, and if this isn't solved by tomorrow I'll give my 2 cents. Or diagnonsense, whatever works for you.

 

[Jando86 10+ year member]

did you only have the 2 ohm speakers on it? and just 2 of them? that would make a one ohm load on the amp.. no bueno

//content.invisioncic.com/y282845/emoticons/wow.gif.23d729408e9177caa2a0ed6a2ba6588e.gif

two 2 ohm speakers, one on left, one on right in the rear (independent channels). that makes a 2 ohm stereo load.

also, it smelled like delicious bacon //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

actually couldnt get a good wiff...

 

[dman4486 5,000+ posts]

//content.invisioncic.com/y282845/emoticons/wow.gif.23d729408e9177caa2a0ed6a2ba6588e.gif

two 2 ohm speakers, one on left, one on right in the rear (independent channels). that makes a 2 ohm stereo load.

also, it smelled like delicious bacon //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

actually couldnt get a good wiff...

fuck you and your ava. It is 2A.M. and I want some noms!!!!//content.invisioncic.com/y282845/emoticons/furious.gif.fc81ca146dbff91fede3ed290dbc4f4c.gif