Quote Originally Posted by Florian
I agree with RGA, my friend runs a REL Stadium with modified power supply (the stock one is crap) and when you run it x-o'd at 30Hz you can hear where it is. This is a Magnepan MG20 fully active and triamped. Granted, it is hard but you will be able to hear it out on complex music from Mahler or Bach. Thats why its better to use two subs instead of one.Ofcourse thats not the only advantage, but one of them. Or just ditch the box in your mains and buy a fullrange speaker that doesnt have a box in the first place. Or a good box speaker that is fullrange also. *

PS: The Quads are very good in the midrange, and i mean very good. But the fact is that the Quads are limited in bandwith and the bottom end extension. What they do, they do very well tough.

* I know its expensive but i am mentioning the ultimate solution here.
Before you agree with RGA, you'd better get the facts straight: So what is the slope of the low pass filter (crossover to you) for the REL sub?

Any speaker has a limited bandwith and low frequency extension. The question is what those limits are. In some rooms, the Quad ESL-63 can do a reasonable job reproducing the 32 Hz organ pedal in Saint Saens Organ Symphony.