For lower power amps driven by 6L6, 845, 211, 300B, PX25, etc... there are plenty. I run Art Audio 845 monos and the soundstage is extraordinary but they are only 45w and that radically limits what speakers you are going to use them with.
Your caveat of higher power is an interesting one. I have had a very good experience with a pair of VTL MB-185s. Lovely amps and had a dramatic soundstage in triode. Tetrode left something to be desired.
I have a Rogue Hydra. With stock JJs it is an unexciting amp. Put in a pair of NOS Ciftes and it is 90% as good as the VTLs in triode and blows them out of the water in Tetrode. Probably my favorite amp for the money.
In all the above cases I have had these driving my own speakers from Verdant Audio and have used a PS Audio BHK, Ayre K-5xeMP and Art Audio Conductor preamp, all with exceptional results.
The Ayre MXR Twentys were in one of the best systems I have ever heard but in fairness they were driving Wilson Alexx's. How much is the amp, how much is the speakers?
I have also hear the McIntosh MC275s bridged in Mono with a C22 peamp. Admittedly the C22 (especially the phono stage) is the star of that system but it was pretty spectacular sounding driving a pair of Focal Sopra 2s in terms of imaging within the soundstage. Definitely the best I have ever heard Sopra 2s sound.
Your caveat of higher power is an interesting one. I have had a very good experience with a pair of VTL MB-185s. Lovely amps and had a dramatic soundstage in triode. Tetrode left something to be desired.
I have a Rogue Hydra. With stock JJs it is an unexciting amp. Put in a pair of NOS Ciftes and it is 90% as good as the VTLs in triode and blows them out of the water in Tetrode. Probably my favorite amp for the money.
In all the above cases I have had these driving my own speakers from Verdant Audio and have used a PS Audio BHK, Ayre K-5xeMP and Art Audio Conductor preamp, all with exceptional results.
The Ayre MXR Twentys were in one of the best systems I have ever heard but in fairness they were driving Wilson Alexx's. How much is the amp, how much is the speakers?
I have also hear the McIntosh MC275s bridged in Mono with a C22 peamp. Admittedly the C22 (especially the phono stage) is the star of that system but it was pretty spectacular sounding driving a pair of Focal Sopra 2s in terms of imaging within the soundstage. Definitely the best I have ever heard Sopra 2s sound.