I have a pair of Dunlavy SC-IV speakers, which are supposed to go as low as 30 Hz. I had a REL Stentor III for home trial. I dialed the setting for the high pass filter in at 25 Hz., so it has to be low enough to be non directional. Does anyone have experience with this combination? It's of course also a matter of costs: one Stentor III is already expensive, but two of them is very expensive! But I wonder: would one Stentor III not be enough to make a good sound?