Sub Set-up Help for Audioengine A2's!

Hi,

I inherited a set of Audioengine A2's. I am using them on my desktop and would like to add a very small sub.

I am looking at this one.

Yamaha-YSTSW012-Front-Firing-Active-Subwoofer

What would be the best way to hook this up to the Audioengine's and what should I set the crossover at?

Please be gentle...until I got these Audioengine's, I thought my Bose Wave rasio was premium sound

Bumping..

Basically wondering if this Yamaha sub will improve the A2's at all?

It got really great reviews on Amazon...and I need small.

Thanks.