Quoted from UKCatsFan76:You need an amplifier to push that large sub, do a search on here. $40 for the amp. Then it will rattle the glass and your game room.
It's not a sub, it's a woofer. You are expecting too much from a single driver that's being used for a very large range of frequencies. Sure, you could add a bigger amp, but it's still not going to sound great. I'd buy one of those external subwoofer's to go along with it, it really opens up the sound all around because it reduces the workload from the cabinet woofer.