Latitude 7390,can the internal speakers be upgraded?(Also "buzzing speakers"?)

I am wondering if anyone knows if better quality after market internal speakers can be purchased for the latitude 7390?This laptop is pretty much my perfect laptop except for the low quality speakers.

I also find I get a buzzing noise sometimes,particularly at higher volumes.Its hard to tell if its a rattling of the chassis and the speakers arent seated correctly or if its the actual speaker making the noise.Anyone got any insight to figuring out what it is?

 

Buy some headphones. Notebook speakers are like phone speakers - to be used as little as possible...

 

http://www.szynalski.com/tone-generator/
Use a tone generator to find out on which frequency the speakers have this problem. Then use the equalizer of the soundcard software to adjust the volume for this frequency lower. Or contact Dell to let them fix the issue.
Please note that laptop speakers are not very well designed to be used at high volumes.