10" 900W Low-Profile Car Subwoofer System, Slim Design, Underseat Install

What amperage fuse should I use for the inline fuse close to the battery? Same as the unit, i.e. 25amp?

You can use a 15A fast blow fuse

If you look at this pyle product: https://pyleusa.com/collections/vehicle-subwoofers/products/plmrw12, you show a subwoofer frequency range of 20hz-2.2khz. For the plbx10a, the specifications only show the low pass filter range of 50-150hz, but not the subwoofer frequency range. The low pass filter range is not the same as the frequency range, but is rather a setting on the subwoofer. My car speakers have a 40hz-20khz range, so I'm trying to find a subwoofer that is lower than 40hz. Can someone check with an engineer to find out the frequency range of the plbx10a? Thanks!

plmrw12 is more of a full-range speaker than a  subwoofer

Waht is the frequency range of this subwoofer? How low can it go? Also, why isn't basic info like this included in the product specifcations?

50Hz - 150Hz

Successfully installed and within 48 hours it sounds like it’s broken. Whenever it’s powered on any music makes it rattle. What could be the problem?

Check all the wiring connections of the unit. You can have it rewired to see any difference.