I've owned a B&K ST 140 and ran it with Thiel CS 2's which were a much easier load than the Thiel 1.5's. The B&K ST 140 is not a great match with low impedance loads.
http://stereophile.com/solidpoweramps/675/index9.html
The Threshold is only rated at 5 Watts less per channel than the B&K into 8 Ohms, but below 8 Ohms the Threshold is much more capable. Oh yeah, and IMHO much better sounding.
http://stereophile.com/solidpoweramps/675/index9.html
The Threshold is only rated at 5 Watts less per channel than the B&K into 8 Ohms, but below 8 Ohms the Threshold is much more capable. Oh yeah, and IMHO much better sounding.