Low power tube amp for Sonus Faber?


I'm thinking of buying an Italian tube integrated Mastersound 845 compact for my SF Elipsa SE. 
It uses 2 845 Valves, single ended at 30W per Channel. Would really like to try a valve amp on the Elipsa. Is this a mistake? Has anyone tried this? I've listened to Mastersound pf100 which are 120W mono blocks and I was blown away. Unfortunately the price difference is nearly ten fold. Has anyone tried using a low power valve amp with SF? 
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Showing 1 response by skiroe

According to a lengthy email exchange I had with Roger Sanders --over 40 yrs of ESL experience -- the jist of what he explained to me is that speakers with a 4 ohm rating will not actually perform at their state SPL range.    a 91 db rated speaker will be somewhere in the 80's.     The discussion I had revolved around a pair of Decware speakers rated at 94db..   Roger's calculation indicated that they were more like 86 db or something to that effect.   If Im not mistaken has to do also with not being 1 watt @ 1 meter.   Im sure someone here that posted remembers better than I.