I have a Rogue Hydra which is a hybrid Class D and have had it paired with three preamps for extended periods of time and was very happy with all three. Ayre K-5xeMP, PS Audio BHK and Art Audio Composer. The latter two are tube units. I also tried and demo'd 4 other preamps through time. All solid state which I hated.
The brightness that still lingers in most Class Ds can absolutely be offset by a tube pre. I found the stock tubes on the PS Audio to leave a bit of brightness but rolling in a pair of Tunsgram's did wonders. The stock tubes on the Composer are amazing and will temper that brightness beautifully. Full disclosure, I am the importer for Art Audio.
I offer a 30 day no questions asked return policy. If you don't like it, return it and you only need to pay shipping back to CT.
The brightness that still lingers in most Class Ds can absolutely be offset by a tube pre. I found the stock tubes on the PS Audio to leave a bit of brightness but rolling in a pair of Tunsgram's did wonders. The stock tubes on the Composer are amazing and will temper that brightness beautifully. Full disclosure, I am the importer for Art Audio.
I offer a 30 day no questions asked return policy. If you don't like it, return it and you only need to pay shipping back to CT.