Which REL sub, R528 or B2

I have the R528 attached to the astonishing Focal Micro Utopia Be - The result is magnificent.
The sub blends perfectly: Fast, Realistic bass.

I use Audioquest Sub-3 + Russ Andrews-Kimber Kable 8TC Neutrik Speak-on REL cable.

The room is about 35 square-meters.

I'm using a Rel B3 connected to a Synergstic Research Rel Spec
Reference Subwoofer cable and using a Synergistic Research T3 SE
Power Cord. This sub effortlessly integrated with my system with speed
and power. Best sub I ever owned.

Joey - Did you have the original Rel cable when you first got the B3? If so how would you describe the difference after upgrading to the SR cable?

Yes, I used the original but after I installed the Synergistic Research
cables and I noticed a lot of definition and separation of instruments.
Especially in the bass department. This sub is fast enough to keep up with
my Focal speakers and disappears and is unlocated. The bass is perfect
low and loud in my room. Only one was needed in my corner to supply all
the bass my room needs. I also tried Audioquest and some others but they
were not the best. Synergistic Reseaech Rel Spec Reference Cable does
it all.

Thanks for the reply. I will say the cable did the same for me. I would have to say the cable added to the speed of my B3 because again I heard attack and decay I never knew existed. It blends in perfectly with my Dyn C1 sig's.