The Onkyo engineers do know how to pack their receivers with features, and each upgrade always includes an additional advantage. The bass was nice and tighl,with an overall meaty LF response, which we noticed on the low organ notes of Bach's "Prelude For 2 Violins". The imaging and depth were beautiful and accurate, while the mid-frequency bias actually helped recordings like Alex De Grassi's acoustic guitar sound. The price is quite reasonable and the SR804 makes a great package deal!