Wondering if I retain my standard speakers and decent pioneer headunit (it was about ?175 a couple of years ago) is it worth buying a budget second hand power amplifier for about ?40? Will I hear a vast improvement. I have no interests in sub woofers, I just want a good sound for playing all types of music. Also, Where do you stash power amplifiers in the MX5? Car in question is a Mk1 with normal door speakers not headrest.