Originally Posted by biglen
My biggest reason for purchasing the sub, was that it goes down to 18Hz. It needs to be in max extension for that, but I don't want to shorten the life of the sub either. Hopefully, Dr. Hsu will shed some light on this.
When any equipment has to work less hard, it definitely help extend it's long term reliability. Setting the sub to two ports open, EQ2 definitely help reduce the stress on the sub when played at the same listening level. That said, the sub still has a great long life even if you don't do that. If you love the deep bass extension, don't worry about leaving it in one port open mode. It's the same as buying a DLP projector - if you run it in ECO mode, the bulb will last longer. However, if you like your picture bright, don't use the ECO mode and not enjoy it just because ECO mode will make the bulb last longer.
P.S. If you have the upgrade itch like most of us, you will most likely upgrade long before getting close to the life of the sub!