Raidho's are anything but fatiguing. Again as a former Dyn C1 and C1 sig owner I would say the dyn's are more fatiguing (Raidho is better in the mids and highs). That said the bass in the Raidho's don't come close the Dyn C1. The bass drops like a rock with Raidho D1's at 50hz (C1's rated at 45hz but really are closer to the mid 30's). But what they do is so much better than the Dyns. The separation between instruments and vocals is amazing due to a much blacker background. Better depth too. I hear detail like I never knew from the Dyn's. They also are not analytical. But like with electrostatics the Raidho's are very directional meaning a small sweet spot. As one reviewer stated "outside the sweet spot the speakers are good but in the sweet spot Good God".
But like I said before Dyn C1's are a bargain (8,500 for the C1 signatures vs 25,500 for the D1's)(stands optional).