You got bigger problems than you realize, the "Jeep" and Wrangler decal on your Jeep is backwards, not to mention the letters on your tires. Im betting the wires to the speakers must be backwards as well, Also your fuel door is on the wrong side of the Jeep. I think if you fix these issues you will solve the speaker problem. My God man I think the whole thing is backwards.
Just messing with ya, welcome aboard.
Tanks do well at crossing ditches and running stuff over but other than that a Jeep will get you anywhere a tank will and more.
Now the tank might get beter gas milage but that is a different story.