Sorry to butt in, but to those who joined the group purchase of monica2 dac might be interested in doing another group buy for the SS i/v stage, I'm going to order 2 units for myself, txt or pm me if you're interested in joining. Its a good time to get them right now since the peso is doing well against the dollar.
If you have a Monica 2 without a gainstage or with the 6688 grounded grid stage, the SS i/v stage is a worthwhile upgrade!
The Monica 2 is a great DAC, the Monica 3 is out and the only difference is it has a built in SS i/v stage and cost much more. BTW, my friend Yeo have discontinued the Monica 2 and might discontinue the SS i/v stage sometime, so take up DOHbert's offer, you will not regret the upgrade!
I ran the SS i/v stage at around 18VDC, this to my ears gave me the dynamics that I wanted.
So those who will get the SS i/v stage, PM me if you want to ask questions how to hook it up to the Monica2 and what kind of regulated power supply to use.