How high do subs go

Sounds like you are trying to integrate with some satellites? As Kr4 mentioned most true subwoofers are designed to operate within frequencies no higher than 80 Hz. There are many subwoofers that will have a range to 150Hz - 200Hz that are designed for satellites or limited range smaller speakers. The trade-off may be low end extension but at least you will have some reach into the lower frequencies, about 40Hz-50Hz, to balance out smaller speakers

You will probably be limited in options but if you do some searching, I am sure you can find one to fit your application in both passive and active units.

Bill B.