Little help with REL subwoofers, please?

@jjss49, that's incredibly generous of you! I'm in Vermont, so not quite local, but I greatly appreciate the thought. I took a look at your impressive system(s) and I can imagine borrowing all kinds of things from you! 

@sns, it's great to hear about your listening session. Fantastic. My own listening sessions have started to feel a little less amazing lately, coincidentally right around the time that I launched this thread. Go figure.

Ishmael, recognizing that the book we call Moby-Dick is but a draft, a draft of a draft, says, "God keep me from ever completing anything ... Oh, Time, Strength, Cash, and Patience!" That pretty much sums up the audiophile world to me....

For what it's worth, I just downloaded the REW and ordered the umik-1. As I said above, I'm curious. In the meantime, happy listening to y'all.

T series subs not fast enough and made in china I would get 2 S/510’s. Remember even if Maggie’s are affordable they need the very best in electronics and subs for much more expensive speakers to actually work right.

@pennfootball71 I don't hear any sense of these being slow thus far. I suspect Rel subs very difficult to make generalizations about since main speakers and amps have relatively large influence on how subs perform. So far, with my Klipschorns, the T9x has virtually no impact on bass performance per se, don't really reach lower, just a bit of db boost in freq. where in room response at my listening position begins to roll off. These all about sound stage expansion for me.

Going into Rel purchase,  speed was of utmost concern for me, assumed these might be slow. Using this reasoning I partnered with Ac receptacle and power cords that I know supply fast, tight bass, considering silver high level speakon wire if I hear some slowing in future.

If these are slow, my past subs and present Genesis sub would be slower than slow, even with dsp slower than high level circuit in these Rels. I'm also open to the fact that over time I may hear some sense of slowness, why I may wish to upgrade to Reference models at some point.

Such rubbish, no data and based 100% on this KH opinion. 
 

T series subs not fast enough and made in china I would get 2 S/510’s. Remember even if Maggie’s are affordable they need the very best in electronics and subs for much more expensive speakers to actually work right.

Rel S and Ref series are faster on specs, issue is whether one hears T as slow, if not than there is no problem. Same with Maggie's, I've heard them with a variety of medium to high end electronics, always enjoyed the sound qualities of these speakers.

 Generalizations aren't worth much in this highly subjective and individualistic hobby/obsession. And criticisms of China made components are political, what does that have to do with sound quality?  Furthermore, virtually all audio electronics have China made components within.