Coincident speakers 14 Ohms - What amplification to use when streaming Tidal.

"A SET tube amp is recommended by Coincident, but I do not play records any more..."

Not sure if I follow the connection..

Same here... how are the two connected?  Pick an amp you like and that interfaces well to your speakers.  In the end streaming and vinyl are both 1V nominal analog music signals

97 (or even 94) dB sensitivity is VERY efficient.  Compared to a typical 89dB speaker that means you need something like 1/4 to 1/8 the power for the same volume. 

An "8 ohm" amp is simply the load it is rated into.  Ohms are a measure of resistance. The higher the easier to drive. The lower the harder. Zero ohms is a short circuit. In practice nearly every amp (except tube amps) is designed for a s low an output impedance as possible -- on the order of 1/4 ohm (0.25 and below). Its the other way around that's a problem - a high impedance output tube amp cannot deliver high current.  A 4 ohm or  (yikes) 2 ohm speaker demands lots of current.  No go, like an under powered motor.
The good news is that at 97 dB it wont need much current anyway!(for the record current = voltage / load in ohms).
Bottom line a really good solid state amp ought to dive anything. Within reason mine will.

just some data points for respected hgih end speakers:
Vandersteen 2 - 90dbTotem 88dbMaggie 7s 86 dbVienna mozart 90db

are there speaker at 107? Probably.  But its rare and suggests it was optimized for other than sound