Mini amplifier for car

I have already bought from various manufacturers as a small stage and the sound was always lousy. At least if one is to clear full range sound (the same amount of tension in the high middle and low frequency range = balanced).
In addition, the housing and the contents of almost any of the manufacturers of the same, even when 2-channel model. For piezo tweeter is to use just yet.
In addition, the labeling is 1000 watts max. a bad joke to hifi newcomers to mislead. ;)
I just let before all the crap with a list of advantages and disadvantages away.