Gpowered, Class D amps are very efficient and should get these Pendragons in a good grip. The SDS amps are great but the DIY Hypex Ncore amps seem to have uped the game. A good class D amp should have no particular "sound", very neutral. Isn't that what an amp should do? Only amplify the source without drawing attention to itself?? Some tube fanatics that are used to a certain "sound" might not go wild for this i'm afraid.
PS: i'm very intrested in a Pendragon myself but also in a good open baffle like a GR research Super-V or an Emerald Physics. Anyone heard these? And how would they compare to a Tekton Pendragon or Lore??