Possessed Radio and component speakers

duker51 · Mar 14th, 2006, 08:17 AM

Hi Guys,
I need some help with my possessed radio components. I have a 2005 Nismo Frontier King Cab with the upgraded 6 disk stereo (not the RF stereo). I bought the following components and had them installed professionally: Alpine MRV 345 V12 Amp, SPS-171 component speakers, and the SPS-170 speakers. I left the stock radio in the truck. The system worked great for about 3 months, and it sounded terrific. Now, all of a sudden I am having issues.

I’m going to describe the different problems I have had over a one week period.

Day 1, turned on the stereo and the back speakers are silent. The front tweeters and the front speakers work. Amp is on.

Day 2, same problem as above on my morning drive to work. Amp is on. Start the truck up to drive home from work, and all 6 speakers work. Amp is on.

Day 3, start up the truck, turn on the stereo, and the sound is really low. I turn up the volume all the way to the max setting 31, and I can barely hear it. The stereo sounds like the volume is set to level 5. It stays this way for the whole ride. Amp is on.

Day 4, same as Day 3. Amp is on.

Day 5, Start up the Truck, turn on the stereo, the left front tweeter works and the left front door speaker works. The back speakers, right front tweeter, and right front door speaker are out. Amp is on. I stop at my destination for about two hours. I get back in the truck, start it up, and all of the 6 speakers work again. Amp is on.

Help! Does anyone have any ideas as to what is going on with my system??? There is no buzzing sound or strange noises coming from the speakers whether they are working or not. I have also not seen any error messages from the amplifier LCD. The amp is wired directly to the battery, and the installer used two of those RCA boxes to connect the radio to the amp.

I am at a loss as to why this erratic behavior is happening to my system. Any help you could give me would be appreciated.

Thanks,
Jerry

avenger · Mar 14th, 2006, 11:46 AM

sounds like an intermittent short somewhere... maybe putting the amp into protection mode?

mdaugherty · Mar 14th, 2006, 01:06 PM

Jerry,
I would bring it back to the installer ASAP. Has to be an amp/wiring issue. I have the same truck and I was contemplating doing the same thing. I just bought a nissan Sirius receiver, so I will probably keep the stock unit. What I do not know yet is whether the KC has an external amp like the CC. IF so, maybe that is what is causing your problems.
Mike D

duker51 · Mar 14th, 2006, 03:17 PM

Thanks Mike!

Yes, I have a phone call into the installer. I don't want to fry anything!

I don't think the stock non RF 6 speaker stereo has an internal amp. I'm not 100% on that, but the installer showed me the factory spec documentation for the radio, and it had no mention of an internal amp.

Enjoy your new components!!

msubullyfan · Mar 14th, 2006, 03:20 PM

Quote:

Originally Posted by avenger

sounds like an intermittent short somewhere... maybe putting the amp into protection mode?

That's exactly what it sounds like to me, but I would think that he would be getting some sort of code on his LCD if that was the case.

Perhaps the line output converters are defective???

I agree with the previous post -- get it checked out ASAP before something shorts out for good.

msubullyfan · Mar 14th, 2006, 03:21 PM

Quote:

Originally Posted by duker51

I don't think the stock non RF 6 speaker stereo has an internal amp. I'm not 100% on that, but the installer showed me the factory spec documentation for the radio, and it had no mention of an internal amp.

You're correct -- the 6-disc changer in the KC is EXACTLY the same as the CC RF system. The only difference is that there's no RF sticker on the KC model.

mdaugherty · Mar 14th, 2006, 06:20 PM

So if the KC has the exact same premium head unit as the CC, and therefore has an external amp, did the installer leave it in the chain and your power amp is getting hot levels? That is a nice amp. I got a bid on a system with that amp, new front and rear Alpine speakers, new head unit, etc, and I just decided to deal with what I have right now. Once I get Sirius hooked up, I will be happy again. And if the whole system goes cowshit, then I can swap some of my old Alpine components in.
Mike D

msubullyfan · Mar 14th, 2006, 07:14 PM

Quote:

Originally Posted by mdaugherty

So if the KC has the exact same premium head unit as the CC, and therefore has an external amp

No, it doesn't have an external amp. The KC head unit is unamplified. Sorry if I wasn't clear.

scuba91ta · Mar 15th, 2006, 06:59 AM

I would def get ahold of the installed and have him check it out - sounds like the amp is a bit intermittant - maybe something internal..

mdaugherty · Mar 20th, 2006, 02:14 AM

What did you find out with your installer?