I just bought the sony cdx-f7710 because it's pimpy brushed aluminum - j/k

anyway I also bought some nice pioneer speakers at the same time - but now that I'm working on a cage for the car the rear deck speakers sound raspy with no backseat cushion

what would be a good replacment for this ap front and rear without mounting an amp since there is no place to hide it as the seats are 2 low and the cage negates most everything else

the car is a 4 door 94 civic

the head unit is 52wx4 max

and just looking for clean sound - not crazy bass ect

thx