In my experience there have been two,The Muse model 160,and the Plinius SA 100 MK III.The Acurus 8008BB was also very good!I'm sure there are many others.I believe all three of these amps were dual mono designs.When I owned them,I also had Sonic Frontiers SFM 160 monos,SFM 75 monos and Consonance Cyber 800 monos.I enjoyed the 3 SS stereoblocks as much or more.I still own/use the Muse amp.All of the amps had strengths and weaknesses.
That said,I have enjoyed many "one box" stereo amplifiers.While maybe not quite as covincing in terms of absolute soundstage,detail retrieval and authority,so many come so close!!!I've enjoyed offerings from Rogue,Cary,VTL,VAC and more.
my current favorite is a Raysonic SP-120 integrated.What joy it brings!
That said,I have enjoyed many "one box" stereo amplifiers.While maybe not quite as covincing in terms of absolute soundstage,detail retrieval and authority,so many come so close!!!I've enjoyed offerings from Rogue,Cary,VTL,VAC and more.
my current favorite is a Raysonic SP-120 integrated.What joy it brings!