Tube Amps Watts vs SS amp


Can someone explain is there is a difference between the watts of a tube amp vs vSS amp, Looking to get a tube amp ,but i see that the watts are much less than the SS amps, So how do these Tubes amps with 25 -70 - wpc drive these high end speakers, I have a vintage pair of AR 9s and 2 mcintosh MC2200 amps in mono (400 WPC) to drive these ,what tube amp will power these under 3-4k new or used, Thanks 
bestbaker

Showing 2 responses by noromance

It's most likely been already covered but a watt is a watt whether it is sand or glass. All other factors will influence how amps work in their installations but a Watt is the same no matter where it comes from.
A 10x increase in power output will result in a 10dB increase in volume -sound twice as loud. Unless you are trying to deafen yourself, you don’t need all that power.
See these meters:
https://www.youtube.com/watch?v=EomDuIvsd3M
https://www.youtube.com/watch?v=_0fdmAp2CbM