Originally Posted by Commander Keen
At moderate sound levels, the stock head unit sounds fine after loudness and EQ are defeated. At higher levels, the speakers will sound better driven by an amplifier.
This... An external amp really helps out on the high-volume end, so if you listen to your music very loudly, EVERYTHING will benefit from being amplified. Most aftermarket components will sound much better than stockers regardless, but they will all begin to wobble and flatten-out at higher volume without more power to push them.