JBL 180.2 Problems, Is this amp bad ?
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=35017
Printed Date: May 14, 2025 at 11:51 PM
Topic: JBL 180.2 Problems, Is this amp bad ?
Posted By: lensam69
Subject: JBL 180.2 Problems, Is this amp bad ?
Date Posted: July 03, 2004 at 10:27 PM
After reading one review after another praising this amp., i decided to buy it...
I've just spent the entire day battling with it.
I'm going to use it to power a pair of infinity's 693.5 They're rated at 105W RMS, and the Amp is rated at ~90W RMS @4 ohms... so technically it's a good match.
After installing the wiring, interconects, fuses, etc etc, I finally plug in the amp to the HU.
It distorts a bit, but it ok because i still hadn't set the gain. Now the troubles begin...
I go for the usuall procedure... Gain all the way down, HU at 3/4 or until it clips, then slowly turn the gain up, until it distorts, the set it back a bit, etc etc.
You guys know the drill...
However... Those speakers should be *loud* paired whith this amp. At optimum gain settings it barely sounds higher than what my head unit used to put out (Alpine 23w RMS CEA2006 comliant).
If i lower the gain, then the volume goes even lower (as it should) causin distortion from turning up the HU to compensate. AND if i turn the gain up, it sounds louder, but it distorts like crazy...
My HU says the preamp ouputs are 4V, and the amp has the input sensibility labeled as .250V - 4V.
Shouldn't this amp drive those speakers LOUD????
PLease Help!!!!
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forbidden wrote:
Wrong advice young grasshopper, go back to square one and do not pass go.
Replies:
Posted By: stevdart
Date Posted: July 03, 2004 at 11:32 PM
One speaker out of phase with the other one?
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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.
Posted By: lensam69
Date Posted: July 03, 2004 at 11:49 PM
No, I checked with the chanels at the same time, and also one at a time.
Should've gone alpine...
Any other ideas???
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forbidden wrote:
Wrong advice young grasshopper, go back to square one and do not pass go.
Posted By: lensam69
Date Posted: July 04, 2004 at 11:08 AM
anyone??  ------------- forbidden wrote:
Wrong advice young grasshopper, go back to square one and do not pass go.
Posted By: DYohn
Date Posted: July 04, 2004 at 11:15 AM
Sounds like you set it up correctly. You must just want more than this setup can deliver. A different amp won't help, the 180.2 is a very nice amplifier and the Kappa 6X9s are decent speakers. If by "loud" you mean you want ear-splitting volume then no, this is not a setup that will do that. But it will deliver around 100+ db with great SQ which is good for most applications. ------------- Support the12volt.com
Posted By: lensam69
Date Posted: July 04, 2004 at 12:59 PM
Actually i solved it...
I had to open the amp. (Factory warranty be damned)
The HP/LP switch was loose... It was barely making contact.
I put a little bit of solder on it, and presto...
Ear splitting sound! Thanks for all your help anyways! It's always appreciated.
Now... where did i put that Diana Krall CD...?
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forbidden wrote:
Wrong advice young grasshopper, go back to square one and do not pass go.
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