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<blockquote data-quote="cneelyii13" data-source="post: 5211490" data-attributes="member: 604041"><p>Hey, people! I am new to this site so take it easy on me. I have been installing car stereo systems for myself and others for over 10 years now. I have also been asked to consult on some installations, but just local. Nothing big. I have recently run into a problem that I cannot solve, but I think that I have an idea. I believe that it has to do with my voltage settings at my head unit, but you all help me on this. This problem is madness.</p><p></p><p>I have a Kenwood Excelon Head Unit, I can't recall the model number at this time. I also have a MTX 204 4-Channel amplifier pushing a custom built component set, and a MTX 302 2 channel amplifier that is pushing a single MTX 5500 8" subwoofer. This set-up is all that is left after I blew a similar subwoofer, a MTX 250D class subwoofer amplifier, and fried a sub pre-out on a newer model excelon head unit.</p><p></p><p>Anyway, my first install included the original Kenwood Excelon head unit and the MTX 204 4-channel amp. I just wanted one amplifier in my truck, because I had heard the the grounding properties in a truck really sucked. I had everything hooked up and working. I put the rear channel on the sub pre-out of the head unit. I would notice that everytime I would come to a stop, the head unit would flash/blink. I never thought anything of it. I did think that it could be a possible voltage problem, but everything was working fine. Everything was working great for a few months until all hell broke loose. One day I went to start my truck and all I heard was this loud continuous bass note that didn't respond to the volume knob. I had to yank the RCA cables from the amp to make it stop. It scared the snit out of me. So after waiting about 10 minutes, I hooked the RCA's back to the amp and unplugged the subwoofer wires. I looked at the wires and tried to reinstall them and a spark like from a battery connection happened. I was shocked so I tried it again, and the same thing happened. At that point, I realized that I had live voltage coming through my system, but I didn't know from were exactly. The voltage had fried my subwoofer.</p><p></p><p>I installed another amp, MTX250D to power a spare subwoofer that I had. I hooked it up to the sub pre-out rca, and the same thing happened. I was able to save my sub this time, but not my amplifier. I realized then that it was my sub pre-out that had a voltage problem, so I replaced the head unit with the newer model Kenwood Excelon, but I left the 4 Channel amp in play. I connected the sub pre-out to the rear channel, and hooked up the sub. I had sound for about a minute, and them it became distorted all of a sudden, and then finally went out. I figured it was just the rear channel of the amplifier, so I installed another amp and plugged it into the sub pre-out, the same thing happened, so I now run it off of the rear pre out from the head unit, but that limits what can be done with the system. I still get that flashing/blinking head unit at every stop. What do you all think it could be?</p></blockquote><p></p>
[QUOTE="cneelyii13, post: 5211490, member: 604041"] Hey, people! I am new to this site so take it easy on me. I have been installing car stereo systems for myself and others for over 10 years now. I have also been asked to consult on some installations, but just local. Nothing big. I have recently run into a problem that I cannot solve, but I think that I have an idea. I believe that it has to do with my voltage settings at my head unit, but you all help me on this. This problem is madness. I have a Kenwood Excelon Head Unit, I can't recall the model number at this time. I also have a MTX 204 4-Channel amplifier pushing a custom built component set, and a MTX 302 2 channel amplifier that is pushing a single MTX 5500 8" subwoofer. This set-up is all that is left after I blew a similar subwoofer, a MTX 250D class subwoofer amplifier, and fried a sub pre-out on a newer model excelon head unit. Anyway, my first install included the original Kenwood Excelon head unit and the MTX 204 4-channel amp. I just wanted one amplifier in my truck, because I had heard the the grounding properties in a truck really sucked. I had everything hooked up and working. I put the rear channel on the sub pre-out of the head unit. I would notice that everytime I would come to a stop, the head unit would flash/blink. I never thought anything of it. I did think that it could be a possible voltage problem, but everything was working fine. Everything was working great for a few months until all hell broke loose. One day I went to start my truck and all I heard was this loud continuous bass note that didn't respond to the volume knob. I had to yank the RCA cables from the amp to make it stop. It scared the snit out of me. So after waiting about 10 minutes, I hooked the RCA's back to the amp and unplugged the subwoofer wires. I looked at the wires and tried to reinstall them and a spark like from a battery connection happened. I was shocked so I tried it again, and the same thing happened. At that point, I realized that I had live voltage coming through my system, but I didn't know from were exactly. The voltage had fried my subwoofer. I installed another amp, MTX250D to power a spare subwoofer that I had. I hooked it up to the sub pre-out rca, and the same thing happened. I was able to save my sub this time, but not my amplifier. I realized then that it was my sub pre-out that had a voltage problem, so I replaced the head unit with the newer model Kenwood Excelon, but I left the 4 Channel amp in play. I connected the sub pre-out to the rear channel, and hooked up the sub. I had sound for about a minute, and them it became distorted all of a sudden, and then finally went out. I figured it was just the rear channel of the amplifier, so I installed another amp and plugged it into the sub pre-out, the same thing happened, so I now run it off of the rear pre out from the head unit, but that limits what can be done with the system. I still get that flashing/blinking head unit at every stop. What do you all think it could be? [/QUOTE]
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