Appreciate the info John.

The sub is a Dahlquist QX125S (10" woofer, 125 watts). I've set the sub as per your advice. In tweaking the volume control, I find that I have to turn it just below the half-way point to hear enhanced bass from my 60's...I may be able to notch it down a little lower after more extensive listening. Is this OK, or should I be considering a sub with a lower low-end frequency spec? I should add that I am not a bass "fanatic"...don't need to hear/feel the nether-world region to the nth degree. I use my system primarly for music, and was just looking to enhance the bottom-end of the 60's.

A final question, should the sub always be left powered on, or does it matter? (I believe this sub goes into a stand-by mode if the power is left on and no signal is being transmited to it, LED indicator changes from green when active to red when no signal).

Thanks again.

Joe