Has Anyone Uesed A PrimaLuna Amp With Harbeth Speaker's

Since you double posted you get two for the price of one:
Just look at these Stereophile measurements: https://www.stereophile.com/content/primaluna-dialogue-premium-power-amplifier-measurements it has a pretty bad load dependent frequency response. You might as well buy yourself an equalizer. Moreover, its output of little over 20 watts is not enough to drive the Harbeths. Just do yourself a favour and do what Harbeth’s designer Alan Shaw suggests and get a beefy solid state amplifier. Even very good ones will cost less and will sound far better.
If you look on this site you will see that there have also been quality issues (there just appears to be a pattern, but I am not sure if it is real).

Harbeth's Alan Shaw demonstrated the M40.1 in Hilversum in the Netherlands (there is a youtube video somewhere but I cannot find it right now). With some music, the peak power indicators on the monoblock power amplifiers indicated that they were producing more than 500 watts per channel.

Sigh. Power means undistorted and uncompressed dynamics, and, as Alan shaw's demo showed, that may mean some 500 watt peak power.