When I say "couldn't make a bad sound," I mostly mean high distortion from over-driving the cone. That is the one to worry about since that can put the sub in danger. Chuffing doesn't put the sub in danger by itself, and most ported subs can be pushed into port turbulence. In fact, I can't think of any that didn't off the top of my head. However, some only do it mildly. The problem with this sub is that it would run into port turbulence pretty early on as I raised the levels, at least at 20Hz and below. It's still a very good sub. And port chuffing is easily addressed by making the subwoofer face away from the listening position since that sound is fairly directional.\n\n\nAs I'm sure you know well though Shady, that is only half of the story. Even if you do not hear the chuff, it means that air flow in the port is turbulent and therefore distortion rises. In a reflex design in the active range of tuning when the port is active, most of the output is from the port as cone displacement decreases. You can see that in all models of ported speakers. At tuning, cone displacement is drastically curtailed and vent air flow increases. Below tuning, cone displacement rises rapidly.\nYou can see what I am saying in your distortion measurements. The port airflow is turbulent at low frequencies. I can say categorically that I make sure that does not happen when I have done designs for members. So, I absolutely would not make that trade off. Can I just say once more that I am so glad I have never had to shop for my speakers.