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Distortion problem - Jeep Grand Cherokee & JVC KD-TD71BT head unit
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<blockquote data-quote="hispls" data-source="post: 8782776" data-attributes="member: 614752"><p>Internal fault in head unit or amplifier can absolutely cause intermittent noise issues. JVC is among the top reliable brand head units so it's likely not that, but you really never know.</p><p></p><p>Honestly my first suspect would be the 25 year old factory amp, but it really could be anything. If you're an electronics guy you probably have an idea of the life expectancy of any of that sort of stuff (particularly electrolytic capacitors) and 24 years old is definitely running on borrowed time at best.</p><p></p><p>I think the best suggestion is to try to bypass the factory amp with whatever speaker you have handy run direct to the back of the head unit into one channel and see if the problem shows up in that when your issue comes up in other channels. I'd guess that a modern head unit may well output as much power as those old factory amps and you may not even notice the difference just deleting it entirely and either running fresh wire or buying whatever bypass adapter Metra sells if you don't like popping panels and pulling seats. </p><p></p><p>My big audio build is a 97 grand cherokee and I bypassed the factory amp and ran all new wire to my fronts right out the gate. It's my second Jeep this model and I've had really good luck with them. It'll **** when I finally have to retire it because I know they don't make them like that anymore and I'm sure nice condition ones are going to be pretty well dried up or project/restoration pieces these days.</p><p> </p><p>As an aside, my dad is a little older than you and I got him into using modern head units a couple years back and he really gets into the flexibility of USB or bluetooth for MP3 and streaming from his phone. The moral of the story is you can teach an old dog new tricks.</p><p></p><p>Good luck.</p></blockquote><p></p>
[QUOTE="hispls, post: 8782776, member: 614752"] Internal fault in head unit or amplifier can absolutely cause intermittent noise issues. JVC is among the top reliable brand head units so it's likely not that, but you really never know. Honestly my first suspect would be the 25 year old factory amp, but it really could be anything. If you're an electronics guy you probably have an idea of the life expectancy of any of that sort of stuff (particularly electrolytic capacitors) and 24 years old is definitely running on borrowed time at best. I think the best suggestion is to try to bypass the factory amp with whatever speaker you have handy run direct to the back of the head unit into one channel and see if the problem shows up in that when your issue comes up in other channels. I'd guess that a modern head unit may well output as much power as those old factory amps and you may not even notice the difference just deleting it entirely and either running fresh wire or buying whatever bypass adapter Metra sells if you don't like popping panels and pulling seats. My big audio build is a 97 grand cherokee and I bypassed the factory amp and ran all new wire to my fronts right out the gate. It's my second Jeep this model and I've had really good luck with them. It'll **** when I finally have to retire it because I know they don't make them like that anymore and I'm sure nice condition ones are going to be pretty well dried up or project/restoration pieces these days. As an aside, my dad is a little older than you and I got him into using modern head units a couple years back and he really gets into the flexibility of USB or bluetooth for MP3 and streaming from his phone. The moral of the story is you can teach an old dog new tricks. Good luck. [/QUOTE]
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Distortion problem - Jeep Grand Cherokee & JVC KD-TD71BT head unit
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