I think this is an amp issue

[9runn1]

Hi I think this is an amp issue. I have an 07 classic silverado truck, it came factory with the bose stereo system. My issue is when I first get in and turn on the radio if I turn it all the way up it is extremely loud but after about 30 mins or so the volume has dropped to the point if I turn it all the way up it's about half of the normal volume.

Thanks for taking the time to check out my issue.

Click to read more...

 

[huberoy123 10+ year member]

Not sure if yours has steering wheel controls, but if it does: that may be your issue. My wife has a Bose system that won't get loud unless I use the steering wheel control to turn it up. The volume knob on the stereo is almost useless. If it doesn't, your amp may be the issue. You can purchase a harness that allows you to bypass the factory amplifier and install an aftermarket one. Have you considered replacing your head unit with a quality one that has an amplifier in it? Or, replacing the head unit and purchasing an aftermarket amplifier. Just some thoughts.

 

[9runn1]

Not sure if yours has steering wheel controls, but if it does: that may be your issue. My wife has a Bose system that won't get loud unless I use the steering wheel control to turn it up. The volume knob on the stereo is almost useless. If it doesn't, your amp may be the issue. You can purchase a harness that allows you to bypass the factory amplifier and install an aftermarket one. Have you considered replacing your head unit with a quality one that has an amplifier in it? Or, replacing the head unit and purchasing an aftermarket amplifier. Just some thoughts.

I

 

[9runn1]

I

Thanks for your input. I do have steering wheel controls and that's all I really use. I've played with all the Volume controls and it remains the same. I am considering putting a

 

[9runn1]

Whoops new phone...different stereo but I'm kinda on the fence right now. A stereo shop where I live said in order to keep my steering wheel controls I would either have to get a pricey bose stereo or I could go with like a kenwood for instance but I would need a special $200 harness to maintain steering wheel controls

 

[huberoy123 10+ year member]

Have you considered going with a stereo that doesn't use steering wheel control. I have a JVC unit that has a volume knob, but everything else is controlled by the touch screen. I even have the option of controlling the volume by swirling a finger clockwise to increase the volume or counterclockwise to decrease it.

 

[brice15s]

Whoops new phone...different stereo but I'm kinda on the fence right now. A stereo shop where I live said in order to keep my steering wheel controls I would either have to get a pricey bose stereo or I could go with like a kenwood for instance but I would need a special $200 harness to maintain steering wheel controls

theres gotta be a cheaper way. keep scouring the internet

 

[some dude]

Could the factory amplifier get hot after running for a while and reduce output to try and mitigate the high temp?
That's what came to my mind when I read your symptoms.

 

[crazyjoe72]

I have a hifonics Zeus zx1000. 500 x2
And it was a gift along with my 12” American bass xd and want to sell them both is there any way you could give me a price range to ask for them both

 

[huberoy123 10+ year member]

theres gotta be a cheaper way. keep scouring the internet

Whoops new phone...different stereo but I'm kinda on the fence right now. A stereo shop where I live said in order to keep my steering wheel controls I would either have to get a pricey bose stereo or I could go with like a kenwood for instance but I would need a special $200 harness to maintain steering wheel controls

I agree that there has to be a cheaper way. Stop past your local Best Buy for an estimate. You should be able to get the adapter and install for less than $200. The local shops usually charge higher prices. Ask me how I know??????

 

[9runn1]

I agree that there has to be a cheaper way. Stop past your local Best Buy for an estimate. You should be able to get the adapter and install for less than $200. The local shops usually charge higher prices. Ask me how I know??????

Thank you for your input

 

[9runn1]

Could the factory amplifier get hot after running for a while and reduce output to try and mitigate the high temp?
That's what came to my mind when I read your symptoms.

I don't know where the amp is located but I always have the heat on coming out of the vents in the dashboard. I probably subject the stereo itself to unusually high temps. And your theory makes sense. So it could even be the stereo that's getting to hot and affecting the output?

 

[some dude]

Yeah. Thermal throttling?
If you wanted to explore further find out where amp is located and do some experiments, try to keep it cooler and see if volume stays louder.

 

[huberoy123 10+ year member]

I don't know where the amp is located but I always have the heat on coming out of the vents in the dashboard. I probably subject the stereo itself to unusually high temps. And your theory makes sense. So it could even be the stereo that's getting to hot and affecting the output?

I would do a google search to find out where the amplifier is located.

 

[audiobaun 5,000+ posts]

I would do a google search to find out where the amplifier is located.

I would do the same. Its possible its up under the dash or behind the glove box