Sub for klipsch box?

[bamaboy 5,000+ posts]

I have a klipsch promedia 2.1 in my room, it sounds nice but i was wondering if i changed to a different sub would it help? depth from holt to port is like 3.5" and the sub is 3.25 i think i was thinking eu 700 or one from partsexpress like a tangband or something here are some pics

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[bamaboy 5,000+ posts]

its a 6.5" sub

 

[Jdizzle 10+ year member]

eu 700 should work nicely in there