Oh, Sedond, aren't you the guy who sold the 99 because of an alleged "impedance mismatch". I know that sound of the Rogue 99 is greatly improved (especially bass tightness)by using it with different feet, specifically #4 BDR cones. Also, according to Mark at Rogue, they are not offering any official *Magnum* mod. BTW, Tml2, I noticed a big difference between the 99 and 66. I liked the 99 much more in my system.