. . . to take the Stentor plunge again. I am very happy with a single Stentor III but, many moons ago, went from one to two subs (in a system MUCH different and long removed from my current one) and vaguely remember the same subtle but worthwhile improvement. It just took your commments to shake out the cobwebs from this fuzzy brain of mine! Having been of the mind set for the last few years that subs "muck-up" the sound of full range speakers, I hesitated to buy the REL. But, crossed over at 23hz and with the coarse and fine tuning adjustments, this Stentor III really adds that last little ooomph way down below and it does it with musical punch, detail and without imposing itself on the woofers in my main speakers! Yeah, a second REL it is!!