Sub Woofer Blown - part #?

[slights]

I have a 98 Explorer 4D, 4WD, Eddie Bauer edition with the Mach stereo system. The subwoofer croaked recently. I found one on ebay, for a 99 model, but have no idea if it is the same speaker and amp. It looks identical; does anybody have a part number for my 98 or know right away if the 99 is the exact same?? Thanks in advance!

 

[Cdn Explorer]

I used a Rockford Fosgate 6.5" sub-woofer. Fits in there like it was meant to be there, and sounds better too! Just try not to break the plastic cover like I did...

Model #RFP4406