i had the sp100r2 which is the direct predecessor to the classic 100 -- i was so excited to find a pair as I wanted the big spendors back in my system after having the original sp100 years ago
i happened to have the harbeth mon 40.3s in house at the same time, was interesting to have them to both to directly compare, both are champs for midrange reproduction but notably different
the spendors have more treble air and less bottom end solidity compared to the mon 40 but there was a troublesome resonance at 2-2.5khz that lent voices and woodwinds a certain grit and hardness and siblance that i could not accept... i tried dsp of various sorts to try to tame but could not -- ultimately i gave up and sold them, despite my initial enthusiasm it was not to be
maybe this problem was corrected in the later classic 100 (it is a the crossover point between mid and tweet...)... maybe....
one person’s data point

