Based on my experiences the TRL tubed preamp named the Dude will make any system sound its best. It sounds like live music.
$3500 and it easily bested every single preamp I have owned or heard in my home system by a wide margin. The other preamps sounded good, but none of them came close to the live sound of the Dude. Instrumnets sounded just like they do live.
This is why I can say with confidence it will make any system sound profoundly better. The amp/speaker compatibility is most important and all efforts should be made to get this right.
Please keep in mind I have owned a bunch of top notch preamps from Thor, CJ, Audio Note, Tom Evans, Tube Distinctions, Audio Horizons, BAT, Aloia, Placette,Supratek and others. None of them came close to the live performance I experience from the Dude. Uncanny and unique. So unique in this way.
Bill