Well, I friend made me an offer on my Yamaha M-80 I couldn't refuse, so I sold it, thinking of upgrading. In the meantime, I found a B&K ST2140 to power my Meadowlark Shearwaters for a great price. It's in fantastic shape.. Hooked it up using Tara Lab Interconnects and using a mint Rotel RCD-855 CD transport. In research, I read so many good things about this amp. But I'm must be missing something. The highs and upper mids are pretty good, but it lacks in solid low end response. I can't figure it out. while the Yamaha M-80 is 250 WPC, I kept the gain scaled back to keep from over powering the Meadowlarks. and even half throttled, it "throttles" the B&K. I am just wondering if there is something I am missing. Specific interconnects or power cable ? Just looking for opinions and advice. Thanks..