Not at all. Watts don't work the way most think. There's many reasons this is so, but unfortunately the minute you delve into them it only riles up the technobabblers and away we go down the rabbit hole into Wonderland. When the only thing that matters is how it sounds, and the reality is there's amps that sound way more powerful than mere RMS watts would lead you to believe.
Those speakers you have are pretty close in efficiency to my Talon Khorus, which I have driven plenty loud in my rather large room with two different tube amps, 50 and 60 watts. Both of which drove them slightly less authority than a 150wpc McCormack DNA1, not exactly a slouch SS amp. Watts just aren't all they're cracked up to be.
