Today for the first time I started having problems with my stereo no music will play and as I try to adjust volume you can hear different speakers giving off a medium volume low pitch frequency noise. Each speaker will separately make noise. Any ideas? Should I just replace the unit itself?

 

Could be wrong but sounds like an amp failure.

 

Is it a bose or non-bose system?

If it's non-bose, definitely time for a new unit. If it's a bose system, it could be the amp or headunit.

 

It's a boss system..so should I replace the unit itself?

 

Bose, it could be either the radio or amp. You can replace the headunit. If the headunit wasn't the problem, you can bypass the amp and run the speakers off the headunit until you get a new amp.

Or you can replace the amp, if it wasn't the amp, you'll need to replace the headunit before you get audio.

Or you can find somebody who knows enough about car audio to diagnose it and find out which of the two is bad, and then replace the bad part.