Out of curiosity, I noticed it has two swappable op-amps...is one for the XLR input and one for the signal stage, or are both for the signal stage (due to PFFB design)? The ZA3 has one signal stage op-amp per channel, so two since it's a stereo amp, and then a single separate op-amp for the XLR input, and then two more for the subwoofer output. It makes sense that the subwoofer ones are out of the equation, but I just wanted to confirm exactly what the two swappable op-amps are actually for. I want to bring over the op-amps from my current ZA3s to the new V3 Monos when I get them, but I'd hate to have to order an extra pair of op-amps in the event the V3 Mono needs two op-amps just for the signal stage. I am currently running just 1 Burson V7 Vivid op-amp per ZA3 on the right channel only (leaving the left channel one stock), and am really hoping that I would not need to order 2 more to use the ones I currently have in the new V3 Monos.
I also went ahead and ordered a pair of the 10amp, 48volt power supplies from Fosi. I am currently running a pair of 5amp power supplies with my two ZA3s, but when I ordered them, I ordered them without any power supplies, so I will just include these 5amp ones with them when I sell them (after putting the stock op-amps back in).
-Ed