I see. You don't want the cost to be prohibitive. It is good Ibasso is including some buffers. I look forward to your impressions.
I will probably be offering some custom L/R modules but not the buffers, as iBasso is including a very nice selection. My main concern is with the cost of rolling opamps in the PB2, as there will need to be 4 modules instead of 2 for each channel. The current D12 L/R modules will work very nicely, except for needing twice as many.
Great! I look forward to it. Do you plan on assembling a topkit or different opamp combos?
My PB2 and D6 are enroute, so I should have some impressions fairly soon. I, too, really look forward to determining the ultimate performance of the PB2 with regard to these two very hard-to-drive phones. I am now driving my K1000, HE-6 and K340 directly from the speaker terminals of my Virtue 2.2.
As these are all balanced phones, the Virtue does a superb job of allowing all 3 phones to reach their full potential. I will have a very good basis for comparison when the PB2 arrives.