I was complaining one day to a fellow camper about the terrible sound quality from the awning arm speakers. He recommended disconnecting these teeny, tiny speakers and mounting better quality outdoor speakers to the outside of the trailer, much like many models of travel trailers and 5th wheels already come with.
It is a fairly simple task on my trailer because the stereo unit is on the same side of the trailer as my awning. Not sure if this is a doable project for you, but it may be worth considering spending your money on better sound equipment rather than just replacing a terrible speaker with another terrible speaker.
2019 Jay Flight 264BHW, Rocky Mountain Ed.
2020 Ford F150 XLT SuperCrew, 3.5L EcoBoost w/Turbo