Will this damage my VTF3?

Hi guys, quick question... I know this has been discussed before but I cannot find it using search. I am wondering what the effect is (or if any damage can be done to the sub) by running the Hsu VTF3-MKII with both ports OPEN and setting it to max extension mode, rather than the usual max output mode? Will this allow the sub to dig a little deeper?

I have recently been playing with my dual VTF3's and I have been surprised to find that I seem to prefer running them with both ports open in max output mode. There just doesn't seem to be as much bass when running them in max extension mode, even though they should be digging deeper. I have been playing a bunch of my favorite LFE scenes which dip below 20hz and I am very surprised that max output mode seems to give me more impact.

So I have been curious to try running the subs with BOTH ports open and flipping them to max extension mode to see what would happen. But I don't want to do this unless it is safe. I seem to recall the big "no no" is plugging one port and using the max output setting. But opening both ports would be safe in either max output or max extension? Is that correct?

Some people used to say this would give an "over dampened" response. What exactly does that mean?

Any info appreciated. Thanks

Thx Legairre, I posted this over at Hsu as well and am hoping to get a reply from Pete or someone. I just purchased a second 3-MK2 locally from a fellow AVS forum member because I wanted to see if it helped even out room response. And it certainly does! No matter what subs I get from now on I will always have 2! I just have way too many problems with no bass in one seating position and too much in another. The duals have really helped even that out.

In fact, I would have had dual 15H's ordered by now if they didn't cost $400 bucks EACH for shipping to the east coast of Canada! OUCH!!! I love your review of the 15H but there is no way I'm swallowing nearly $1000 bucks for shipping on two sub. No matter how good!

I'll just wait for someone locally to sell their 15H in a couple of years