This is still a solid performing sub however it would have been nice to see some additional measurements in different modes since the reveiwer was very critical of the limited extension with all ports open. Keep this in perspective.
Unfortunately we had time to only measure and listen to one mode (all ports open). As seen in the curves provided by the manufacturer, the one port open mode should provide true below 20 Hz extension (at reasonable SPL levels), an overdamped response (gentle downward sloping response), with stronger output at 16 and 20 Hz, but slightly less output in the 25 - 32 Hz range (port output actually cancels woofer output at 16 and 20 Hz in the two ports open position). With this model, you can choose your own set of compromises. When listening to music that does not require as much bass headroom, but you want very tight sounding bass, set it to one port open or sealed mode. When you are watching movies with lots of sub 20 Hz, set it to one port open. When you watch movies or listen to music that does not have sub 20 Hz content but want the most visceral impact with minimum compression artifacts, use the two port open mode (and set to lower Q if you want a tighter bass).
