It wasn't pushed past xmax or bottomed out. I wasn't throwing a ton of power at it or playing much below tuning. It was on a AQ 3500 but wasn't getting anything close to 3500. I was running just the one until I could build the new box for both of them. The suspension didn't last too long either, it seemed to get pretty soft way to fast. I chalked it up as getting a dud. It happens. My hdc3 took it fine and the hcca took it fine and both of them were ran in the same box on the same music for the most part so I'm sure it wasn't my music or the box. I actually called and asked if you guys were having any issues like this since it lasted less than a month and the guy I spoke to said no. He blamed it on my box but after I told him the specs and everything he said it should work great in my box and handle close to 5k. I have heard from a few people that said they have seen a few people have issues also. They said something about a glue change or something that was not working as well as the old glue.