A 50 watt integrated tube amp will drive the 7Us just fine. That said, Tyler speakers in general are very revealing, so while a 50 watt integrated will drive them fine, the model of that 50 watter will most likely make a difference as to getting the most out of the 7Us. As for Bartokfan's comments, I will respectfully disagree on a couple things...
The 7Us are not the same speaker as the Thors (although they do share some of the same drivers). The crossovers are different and the internal design is not quite the same either. As for the tweeter, IMO the Millenium tweeter is on par with the Revelator, but no better (and the Revelator actually costs more). The Revelator is a bit more detailed, while the Millenium is a bit more natural sounding. It really is a tie to my ears, and will be more determined by your personal preferences than anything else -- both are exceptional. I have Tyler speakers with both versions of the tweeters and both implementations sound tremendous. Ty will indeed swap the Scanspeak for the SEAS in the 7Us (or any of his other speakers) if you prefer the Millenium, and tweak the crossover to match accordingly for no extra charge for the swap, BTW.
---Dave
The 7Us are not the same speaker as the Thors (although they do share some of the same drivers). The crossovers are different and the internal design is not quite the same either. As for the tweeter, IMO the Millenium tweeter is on par with the Revelator, but no better (and the Revelator actually costs more). The Revelator is a bit more detailed, while the Millenium is a bit more natural sounding. It really is a tie to my ears, and will be more determined by your personal preferences than anything else -- both are exceptional. I have Tyler speakers with both versions of the tweeters and both implementations sound tremendous. Ty will indeed swap the Scanspeak for the SEAS in the 7Us (or any of his other speakers) if you prefer the Millenium, and tweak the crossover to match accordingly for no extra charge for the swap, BTW.
---Dave