Am running 300B SET monoblocks (10 watts per) with Tekton Double Impacts ($3250) and they are a match made in heaven. Also have Emotiva XPA-1s connected and they have 1000 watts into 4 ohms. Because the SET amps are so much more accurate and pleasing, I listen at louder levels with 10 watts than with 1000! Go figure. Eric Alexander at Tekton is very pleasant to deal with and although his cabinets are utilitarian, the speakers and designs are exemplary. Terry London and many others have been extolling this combination. These are truly full range speakers and with REW convolution tuning they easily go down to 20cps.