Bookshelf speaker pairing with subwoofer

@m20j201

Not sure what your budget is.

For excellent pairing with subwoofers make sure you pick speakers that come with port plugs- e.g. KEF, B&W, Dynaudio etc. The reason is that the output from the speaker ports is usually low in frequency where it will compete with the frequencies coming out of the subwoofer. What happens when the port output mixes with the subwoofer output is that you can get cancellations in the sound, additions to the bass sounds that can create peaks or be out of phase with each other that will lack clarity and sound hard / distorted.

It is best to plug the ports and let the subs integrate with just the frequencies of the main speaker’s woofer.  Trying to integrate the subwoofers with the sound of the ports AND the woofers is impossible to get right.  

Sealed speakers are also an excellent option to match with subwoofers.  The issue us that not many stand mount speakers have sealed enclosures.  ATC for example. 

The Triangles are super bright IMHO. The MoFi SP 8 are not and also very good for the money but may not integrate very well. . The MoFi SP 10 should not need a sub.

I would look for a used or discounted pair of Dynaudio Contour 20i.  Totally smooth / non bright and are designed to use port plugs as an option (they come with them).  I cannot emphasize enough how port plugs make for the best sounding subwoofer integration.  If you are a careful observant listener, subwoofers and open ported speakers can sound excellent but you will also hear compromises too, things that sound worse than without the subs.  Plug the ports and no compromises along with easier integration.