Originally Posted by SmokenAshes
I feel like a cave man figuring out a math problem while looking at these graphs.
You can read and study those graphs, the ones for the PB12-NSD and the EX, and still be no better off at making a decision. It's very close.
I will say this about the VTF-3.4. I think the sealed sub mode is mostly gimmick, in that if someone wants a sealed sub, then buy one that was specifically designed to be a sealed sub. For most people it will be an unused option. And I suspect that the Q tuning it not super useful unless one is taking sophisticated measurements with a mic and REW or maybe through using the SMS-1 sub EQ. Otherwise, it will be mostly guess as to how to tune it that finely.
If I had to pick between the VTF-3.4 and the PB12-NSD, I'd probably go with the PB12-NSD for the lower distortion below 30hz.