Admittedly, this issue may have been around for a while and I'm just now noticing. I've never been that impressed with the installed BOSE system...but I don't recall ever feeling the need to troubleshoot. Last week, I felt the volume seemed a bit low and noticed that no sound was coming from the front driver-side speaker and very little sound was coming from the front passenger speaker. It's possible, but doubtful, that both front speakers would be bad. Before I take it in for diagnosis, I figured I'd ask on here if there is a recommendation on what I can look at. Also...both fade and balance in the settings are right in the middle (i.e. issue isn't that they were set to rear) Thanks.

 

Yes, both could easily be bad especially the front dash as they are in one of the greatest temperature varying areas of the vehicle.
It could also be the audio system itself (dirty controls, failing channel amp, etc) and it's much easier to have a qualified tech inspect that unless you like removing/reinstalling dash panels.

As an audiophile with a home studio, speakers, not even all-weather ones, can handle indefinite exposure to temperature extremes and humidity (or lack thereof) without losing some or all of their abilities to produce soundwaves. Where and how you use them will impact that and in vehicles the temperature and humidity levels are generally very extreme.
Also, like everything else, they will start to degrade the minute you start using them, but most folks will never monitor megahertz readings that will show this is occurring.
They just wait until they can actually "hear" an issue or can't hear anything.
Purchasing higher end products won't necessarily increase their longevity but "may" increase the sound quality.
Unfortunately, no one's hearing is identical and what most audio equipment can produce is above the highs and below the lows humans can hear anyway.
You won't hear it, but your body might "feel" it, and your wallet certainly will.

 

Thanks...my wife isn't complaining right now...so not an emergency...but I'll likely schedule either dealer or a car audio place to take a look and see if it is simple or replacement of components is required.

 

If you decide to do it yourself, remember that those Bose systems take special low ohm speakers.