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Unread 12-19-2011, 10:42 AM   #1
jecko
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Radio replacement with infinity gold amplifier

Greetings all, I am writing from italy. I need your help.

I have a ZJ grand cherokee limited 1998 production, with an Infinity Gold sound system. I decided to replace the stock radio, and I need some information.

I was told that you can not use an aftermarket radio in the presence Infinity Gold amp, as it works with an impedance of 2 ohms instead of 4 ohms. This would result in damage to your car stereo with aftermarket amp to 4 ohms.

I'd like to know this information before the components are broken.

Greetings from Italy, you are great!

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Unread 12-19-2011, 11:09 AM   #2
HighLonesome
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You can use the Infinity amp with another radio. The amp accepts line level input. It's the Infinity speakers that are 2-ohm.

Oh and welcome
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Unread 12-19-2011, 11:57 AM   #3
jecko
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i have replaced stock speakers with another one because old are broken. It's a problem for overheating?
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Unread 12-19-2011, 12:39 PM   #4
sebian
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I have replaced the head unit, and all my speakers with aftermarket parts. I am still using the Infinity Gold amp though, and no probs with anything.
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Unread 12-19-2011, 01:00 PM   #5
HighLonesome
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Quote:
Originally Posted by jecko View Post
i have replaced stock speakers with another one because old are broken. It's a problem for overheating?
If the replacment speakers are 4-ohm, they amp will run cooler.
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Unread 12-21-2011, 12:07 PM   #6
jecko
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What you said is true. Today I installed the new radio, and there is no problem.

I had to make an homemaded plexyglass mask because i have used a radio 1DIN but with dimensions of about 1,5DIN.

In italy is impossible to find a 1,5DIN radio.

Eventually I put a photo.
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Unread 12-21-2011, 12:17 PM   #7
somebody5788
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Quote:
Originally Posted by jecko View Post
What you said is true. Today I installed the new radio, and there is no problem.

I had to make an homemaded plexyglass mask because i have used a radio 1DIN but with dimensions of about 1,5DIN.

In italy is impossible to find a 1,5DIN radio.

Eventually I put a photo.
That's because they don't really make them anymore anywhere. We just buy the dash kits that allow you to mount a single DIN into the 1.5 DIN slot.

It was free with my radio and I have another one for when I finally talk my buddies into a Jeep haha
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Unread 12-21-2011, 12:29 PM   #8
HighLonesome
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Rock on.
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Unread 12-21-2011, 01:26 PM   #9
E-rok
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my 96 had a pioneer HU installed when I bought it, and the speakers sounded blown if I turned the volume up at all, it was terrible. got a stock HU at a JY and it sounds great now. the pioneer WAS installed with an install harness, but there was nowhere to plug in that small 2 wire plug, not sure what that was for. I almost bought new speakers thinking they were blown, good thing I didnt
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Unread 12-21-2011, 02:17 PM   #10
somebody5788
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Quote:
Originally Posted by E-rok View Post
my 96 had a pioneer HU installed when I bought it, and the speakers sounded blown if I turned the volume up at all, it was terrible. got a stock HU at a JY and it sounds great now. the pioneer WAS installed with an install harness, but there was nowhere to plug in that small 2 wire plug, not sure what that was for. I almost bought new speakers thinking they were blown, good thing I didnt
I believe in those years the VIC and the Radio had some communication for setting time. My 94 didn't have that plug.
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Unread 12-21-2011, 02:33 PM   #11
E-rok
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Originally Posted by somebody5788 View Post
I believe in those years the VIC and the Radio had some communication for setting time. My 94 didn't have that plug.
I change the time on the VIC and it doesnt change the time on the HU

either way, something with the aftermarket HU make the speakers sound horrible
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Unread 12-21-2011, 02:34 PM   #12
PolkaPower
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The new head unit will probably sound much better without the stock amp. The stock infinity stuff is pretty poor quality.
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Unread 12-21-2011, 03:10 PM   #13
HighLonesome
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Originally Posted by PolkaPower View Post
The stock infinity stuff is pretty poor quality.
What facts is that statement based upon? Its all made by Alpine and I have found the opposite to be true.
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Unread 12-21-2011, 03:27 PM   #14
PolkaPower
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I removed the stock stuff on both limiteds that I have owned and had both pre amped aftermarket head units sound much better than the stock stuff. It's cheap bottom of the barrel stuff with infinities stamp on it.
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Unread 12-21-2011, 03:46 PM   #15
somebody5788
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Quote:
Originally Posted by E-rok View Post
I change the time on the VIC and it doesnt change the time on the HU

either way, something with the aftermarket HU make the speakers sound horrible
I'm not sure then, I had the same Pioneer you had I believe. Compared to my other ZJ with an OEM radio it did sound better. My Clarion beats out both of them.

Polka is right, If I went as far as bypassing or replacing the stock amp I am sure it would sound better. The stock Infinity amp is basically terrible but it would be a lot of work for me to change things.

As far as OEM vs Aftermarket, the connections you make in the harness can determine whether you get good or bad sound. Crimp connectors are somewhat ok but the best way is solder and heat shrink tube. This is what I did and I have no quality problems, it just lacks some of the notes that I think it should be able to reproduce.
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