I have some links for you, even though you just bought your subwoofer. AVtalk measured the 800R and the original 800 at ground plain. Did pretty well, but the THD was high. 800R: http://www.avtalk.co.uk/forum/index.php?t=msg&th=14718&start=0&rid=0&SQ=0 800: http://www.avtalk.co.uk/forum/index.php?t=msg&th=13937&start=0&rid=0&SQ=0 They're not your sub, but damn close. SheepStar
