Are they useful or were they just put there so the dealer could make money
off unsuspecting consumers? They face each other and are six inch full range
Pioneers. Do they serve any purpose at all? I am not hearing any.

If I replace them with better speakers can I expect any improvement in sound
or should I just leave them as is and pretend that they aren't there? I was
thinking that perhaps something with an aimable tweeter might provide some
additional ambience but I am not so sure given how low they are mounted in
the rear compartment.

What have people done in their cars?