You have to consider what ohm you can wire the sub to. The sub will perform at what ever ohm but it will ask the amp for more/less power depending on how its wired. . If you wire the sub down to 2 ohms the sub will ask the amp to deliver power at 2ohms. Ohms is like the running pace of the amp. Work it too hard it will have a heart attack. Work it to easy and it never reaches its potential. Find the right pace and it can complete a marathon. Example: 2ohm stable 1000 watt amp and svc 4ohm 500 watt sub. The 1000 watts @2ohm is like your base line number. You can run the sub so called regular and it will ask the amp to deliver power at 4 ohm ( 4 ohm sub). Since the amp is 1000 at 2 ohms its 500 at 4 ohm. You half going up, double going down. If you wire the sub down to 2 ohms it will ask the amp to deliver power at 2 ohms which the amp rating tells you it will do 1000 watts. What to consider- 1000 is more than sub can handle. Now if you have more than one sub and/or voice coil you could wire the sub to 1 ohm. If you ask the amp to deliver power at 1 ohm ( going down doubles) you will get 2000 watts which the amp can't handle. You have to UNDERSTAND what wiring configuration does to the amount of power you ask the amp for. Look at a wiring diagram and figure out what amount of voice coils will allow you to wire your setup in a way that asks your amp to deliver power in a way it can handle. I really hope this helps you understand. Like someone else said match a new set of subs to your existing amp and see if you like it!