what is this full total sound quality your are talking about? isnt that juss redundant?
and to answer your question..
http://www.diymobileaudio.com/forum/product-selection-comparisons/9806-rear-fill-do-you-use.html
and to answer your question..
http://www.diymobileaudio.com/forum/product-selection-comparisons/9806-rear-fill-do-you-use.html