Subwoofer for classical music listener

Al,

I'm using a Rogue Pharaoh integrated class D amplifier with a Vandersteen 2Wq sub. After reading this thread, I tried a little testing. When I turn the balance control all the way to the left while playing music, the sub sounds pretty much normal. But when I turn balance all the way to the right, the subs output seems somewhat attenuated. When balance is in the mid setting, all seems normal. Bass sounds good and well integrated (seamless) with the main speakers. Using one sub, the left and right signal is summed at the sub. Everything to my ears sounds normal and good, but I can't help but wonder if I'm not getting quite as much mix of the right signal along with the left. I have had this sub in my system for over a month and a half with everything turned on most of the time and have noticed no ill effects to the powered sub or my Rogue. Any thoughts?  Thanks!   
Tim

Thank you, Al, for your input. It is much appreciated!
Tim

You might not have it  dialed in quite right. Some of the imaging problems come from the single sub. you have both channels mixed together which cancels the ambient and phase signals coming from the low frequencies for both Left and Right channels. Contrary to popular belief, there are signals down in the low frequencies that will give clue to direction and space.

smer319,

             "Only REL subs work well."
Prove it.... That is, prove it without B.S.ing all the fine people of this thread.