Desperate Radio Help

[Rocket Man]

We would have to dive deeper into Ohm's Law to understand this. The power goes up and down with the volume level obviously. And when you change any two things, as in the voltage (volume level changes this) and
the resistance (changes in speaker between 2/4 ohm) , it changes the other item in the triangle which is current (amps). Watts are an expression of current multiplied by voltage. I misstated when I said amps put out a set amount of power. Explaining electrical theory is not easy sometimes lol. Here's a quick explanation of resistance though, so when you change between 2/4 ohm speakers it should help explain what happens.

"What is resistance?An analogy would be the size of the water pipes and the size of the faucet. The larger the pipe and the faucet (less resistance), the more water that comes out! The smaller the pipe and faucet, (more resistance), the less water that comes out! This can be thought of as resistance to the flow of the water current.
All three of these: voltage, current and resistance directly interact in Ohm's law.
Change any two of them and you effect the third."

 

[Rocket Man]

So on the way to work, I heard 2/3 distortion pops 5-10 minutes in then nothing again. About 30-40 minutes in the sound stop completely. I turned the radio off then turned it back on and it was fine. I have a Kenwood DDX6703S. I’m starting to wonder if it’s the head unit. What’s everyone else thoughts? I got three days off coming up so I’ll pull the radio and either check the wiring or redo all the connections. I may also throw the stock one back in for a couple days and see what happens. I don’t wanna do that Bc then I’ll have to go back to AUX but I can probably survive for a few days during testing.

I think it's either the HU or the amp, and I'm leaning towards the amp, it's possible the 4 ohm speaker messed it up. Pops and such are often audio ic's on the way out. Whichever is easiest to swap out, that's what I'd start with.

 

[Meccanoble]

From what I hear, Kenwood makes really good head units. I'm surprised to hear so many issues but I'm leaning towards HU because I dont see the amp controlling volumes like that and you also mentioned non audio issues such as back up camera problem. Could be combo of both. Its cheaper to replace speaker < amp < HU

 

[iamdub]

Maybe a loose plug or otherwise loose connection(s) behind the HU, including the interface? Since it's pretty much plug-and-play, I'd throw the original HU back in for a few days to at least rule out that variable.

 

[Ben Hinz]

Canned the Tahoe today and got this code. I’m guess it’s probably from when I unplugged the amp while trying to replace?

 

[Rocket Man]

Canned the Tahoe today and got this code. I’m guess it’s probably from when I unplugged the amp while trying to replace?

Most likely, especially if you turned the key on while it was unplugged.

 

[swathdiver]

Is that an active code or historical? Clear it, turn the car on, run the radio and see if it comes back.

I see Mark's post, that's probably what happened.

 

[mikeyss]

Did some googling, you're right, the Bose Centerpoint uses the Lux amp with the 10 speaker system, Y91 code. Denalis and Escalades. Bose calls it a 6000 series amp while the one in the Tahoe (according to Bose employee in article) said they have 5000 series dumb amp.

And in the wiring diagrams, only Y91 has the center speaker in the dash too. I'm pretty sure based on his RPO codes that his system has the dumb amp with 8 speakers and the sub. All his codes are the same as mine save for his radio/nav (UVB) which I think is because he has U42, the rear DVD which mine does not have. My radio/nav is U3U.

I saw a post where I guy changed the ends of the wires to RCA cables and plugged them into his radio eliminating the dumb amp and making it sound better/louder.

One recent discovery; the only smart thing the dumb amp does is lower the bass the louder the volume goes up to protect the speakers.

Now I'm confused, lol. My 09 LTZ has 10 speakers, 4 in the doors, 2 A Piller tweets, 1 center dash speaker, 2 D Piller tweets, and the sub in the console. I do not have RPO Y91 though. I have NAV and rear entertainment as well.

 

[swathdiver]

Now I'm confused, lol. My 09 LTZ has 10 speakers, 4 in the doors, 2 A Piller tweets, 1 center dash speaker, 2 D Piller tweets, and the sub in the console. I do not have RPO Y91 though. I have NAV and rear entertainment as well.

You sure there's a speaker under that dash grill cover? If so, then that's a new one to me. Do you have a Tech2?

 

[mikeyss]

You sure there's a speaker under that dash grill cover? If so, then that's a new one to me. Do you have a Tech2?

I am 100% sure there's a speaker in the center of the dash, I removed the cover to add a piece of foam to prevent rattles. Unfortunately I do not have a tech2 though.