Herron VTPH-2A, Herron VTSP-360 and Herron M2

I have the VTSP-360 ESP/REF and one of the last VTPH-2A phono stages that Keith made.  My M1 amps are on their way back from Keith after some "updates". They had already been upgraded to a FET front end and he has some additional tweaks he's doing to them. He makes this stuff to listen to himself and is somewhat tight lipped about what exactly gets "updated" or "upgraded" from one model to the next, other than describing the sound you should expect to hear.  I change gear more often than most probably, but the only thing that I see changing in that part of the chain in the future is possibly the amps.  His tube gear is fantastic.

My VTSP-360 ESP has been sent to Keith for the REF upgrade.  I did upgrade from the M1 amps to the M2 amps.  Every change has been a positive one! 

Are the M2 amps class a/b. I'd guess as much. I think they run at 100 watts. Class A @15 watts would be phenomenal!  Class B for the rest would suit fine! 

That would be a good question for Keith.  150w into 8 ohms and 275w into 4 ohms.  I believe they only run a few watts in class A but I'm not entirely sure

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