My praise of the VB-88 has been unreserved, and I still feel that way.
I want to report one more thing I didn't notice until I A-Bd with a Bergantino NV (sealed).
The sound from the port is delayed (well, "of course", I would say now, but had not noticed it).
I don't notice any tonal negative from this (neither with bass nor with hifi music played through it).
And I guess that almost everyone here would describe it with a positive word, like "thump", etc, as it does feel kinda pleasantly dynamic-like. Myself, I haven't decided (about this specific little temporal effect).
But it does lead to something important:
If the lows are delayed in time, then their phase must be different from what it would have been, but I hear no problem. But there's this other cab I've complained about, and I thought the main problem with it was a big phase shift as it passed through its tuning frequency.
So, there's this mystery of why I don't notice any audible negative due to phase shift in the VB-88. And here is my answer:
Another member here once mentioned that the frequency response of the VB-88 is already down a little, already at 45Hz (well above where I think its tuning frequency is). So my theory is that the VB-88s frequency response is allowed to begin decreasing gradually at a frequency quite a bit higher than its tuning frequency (instead of being held flat for as long as possible and then collapsing suddenly, and above 41Hz, where I can hear it), until it finally collapses (less severely because it has already declined some) below its tuning frequency (and below 41Hz, where I don't hear it).
Anyway, just one more little thing I haven't noticed anyone mentioning.