Vfet / SIT Amplifiers

@sonetduo haha, it's definitely a synergy thing... I am a big believer in the genius of Mr. Pass!  

@zm Me too. You might take some of my comments that were previously misdirected, and scrutinize your preamp. It should not be a volume thing that make an amp 'wake up', unless it has a malfunction (which, to do that, would probably be bias-related). But if the amp seems OK, really take a hard look at the preamp.

So yesterday I ended up pulling the trigger on a Don Sachs model 2 - going to try that with the SIT-3 and see how it does!

Well, I guess I'll resurrect this thread. I've recently bought Victor JM-S7 and two Yamaha B-3s. I found this forum looking for some info about Victor's amp for my review. Unfortunately, it's practically impossible to find any.
I've recently reviewed the Yamaha B-3 amps and it was a delight. Sure, I haven't heard all the amps in the world, but I can say one thing, Yamaha B-3 is the best sounding amp so far (at least to my ears).

Both, the B-3 and the JM-S7, are fantastic amps. I can't agree more about the sound signature of the B-3.
Unfortunately for you, now you are tainted by the vfet virus and I have a prediction to make that your vfet collection will gradually grow :)

I have most of all Vfet amps ever made and I never get tires of listening to them. B-3s are special indeed and besides the Sansui BA-1000s, they are the only vfet amps that could be used in BTL mode, albeit, if you have hungry speakers, the B-3 or the BA-1000s are not the best choice, while using them in BTL mode.

You will also enjoy the Victor but the sound signature of the NEC vfets is different than that of the Yamaha.
Note that all three of your amps will need restoration soon.