I have both Duke's and Miles III, I have used them with YBA pre/pow 400, ML 32/33h, Atmasphere 60W OTL mono's and Spectral 30ss/250. Most resolving of all was and is Spectral combo, ML is dark sounding amp, OTL's are all about midrange, YBA is on the slow side with fantastic timbres, hallographic imaging and natural highs.