I'm going to say going on past experience with Sony subs, this one will be an improvement over your current one. No, there is no such thing as too much sub, though this one is not a bottom dweller. It will get you to ~25Hz in output mode and close to 20 in extension mode IIRC. The two ports and a switch on the amp allow you to select that tuning - you'll need to manual to properly configure it as you could damage it if you set the amp one way and configure the ports another.