I’ve had both and would go with Rythmik. I’ve had many REL subs over the years and enjoyed all of them except the T9x. I had a pair and just could not get them to sound good. The Rythmik goes a lot lower also. My experience with the T9s made me question their quality and price to performance ratio. They market their new aluminum drivers as an upgrade but I think their old doped paper/pulp ones are better. At around $1100 shipped the Rythmik are a tremendous value.
Rel t9x or Rythmik F12G
Trying to decide between these two. Similar price. I have a small room (11 x 11) and I am trying to compliment Klipsch Forte 3’s. Looking for the best sounding bass for music only. Anyone have experience with both that can expound on the differences? Amp is a PL Evo 400. I also use a Dynaco solid state rebuild amp. Thanks