Cab Speakers for the Jensen VR209

[bigb]

I have the Jensen VR209TP which is standard in the Sprinter chassis of my year however since the class A lost the Sprinter doors they put some Audiovox 6.5" RV speakers in the side panels. I wanted to upgrade them and being careful to try and match the watts closely to the originals I ordered a pair of MB Quarts, however when I installed them tonight they sounded awful, muddy and distorted. The Audiovox sound better so I am thinking of just buying a new pair of those unless someone has found a better option. Part of the issue of course is the mounting locations which allow for vibration but working on that with tighter mounting and sound mat.