Subwoofer

@jpwarren58  : Not complex, it could be complex if you insist in only one subwoofer and do not care about the very high Intermodulation Distortion and Total Harmonic Distortion the Ryan speakers havs.

Subs: HSU or Velodyne.

R.

Suggest you look at B&W’s top line of subs, the DB series. My Magico dealer recommended them. My JL Audio f113 sub craped out so needed a replacement. Bought a pair and they are excellent. Easy and fast to integrate with my Wilsons using their onboard software and your smartphone.

@jpwarren58 , If you try adding just one subwoofer to your current situation you will be very unhappy with the results. I suggest you wait until your circumstances improve. At any rate adding just one sub is never a good idea, Two is the minimum. 

Mijostyn is right for me...

I added ONE sub few years ago, because so good was the Mission Cyrus in the bass  they are not  good up to under 45 hertz and organ music goes under...

I disconnected it the same day and sold it... ( Kreisel k9  sub )

integrating subs is a job of his own...

@jpwarren58 , If you try adding just one subwoofer to your current situation you will be very unhappy with the results. I suggest you wait until your circumstances improve. At any rate adding just one sub is never a good idea, Two is the minimum.

You left out the single BEST brand of subs to consider for two channel: REL. Why? Is a budgetary constraint?