I have a pair of Vandersteen Quatros and run them with a Pass Labs Aleph 3 and have plenty of headroom. If my little 30 watt high current class A amp has no issues, your 100 watt tube amp should be just fine.
Amp for Vandersteen 5A Carbons
Getting ready to, very possibly, make a deal for a pair of these Vandy's. Wondering if my amp will do. It is more than fine with my current speakers, some older Infinity's with powered side-firing subwoofers, but those speakers have a sensitivity of 96 dB. The Vandersteen's is 87 dB.
My amp is an Audio Research VT100. 100 watts/channel.
My amp is an Audio Research VT100. 100 watts/channel.