@blin116 - I defer to mapman on the efficiency issue. The way I see it is this: The Ohm Walsh speakers represent such a good value, that if you find you must upgrade elsewhere, such as your amp, it is well worth it, as these speakers will let you hear what you spent the money on. If your integrated has pre-outs, you can try borrowing a higher powered amp to see if you like the results. But you may not feel this is necessary.
My thoughts are that John Strohbeen does not want to present Ohm speakers as tweaky or demanding of a lot power or expensive electronics. And, to a degree, he is correct. As my initial review noted, the 2000s sounded quite good on an older Onkyo surround receiver rated at 80 watts per channel without my subwoofers. And yes, you can plunk them down in your room, play a little bit with toe-in, and off you go with good sound. But, and it is a big but, none of this means the Ohm Walsh series won't respond well to better electronics, tweaks, room treatments, etc. They will, and in spades. The good news is they are not tweaky in the sense that they won't sound good at all unless you get fancy footers, expensive gear, high-priced cables, or extensive room treatments. So one can do as much or as little as they like, and then just enjoy.
My thoughts are that John Strohbeen does not want to present Ohm speakers as tweaky or demanding of a lot power or expensive electronics. And, to a degree, he is correct. As my initial review noted, the 2000s sounded quite good on an older Onkyo surround receiver rated at 80 watts per channel without my subwoofers. And yes, you can plunk them down in your room, play a little bit with toe-in, and off you go with good sound. But, and it is a big but, none of this means the Ohm Walsh series won't respond well to better electronics, tweaks, room treatments, etc. They will, and in spades. The good news is they are not tweaky in the sense that they won't sound good at all unless you get fancy footers, expensive gear, high-priced cables, or extensive room treatments. So one can do as much or as little as they like, and then just enjoy.