Thiel Owners

@thieliste , How to differentiate the generation of cross-over of cs3.7? I got a black pair recently.

Any recommendations of add-on sub to match 3.7 or 7.2? My current equipments included Linn DS, YBA 1 pre-amp and accuphase m-1000 mono with MIT MH-750 shotgun speaker cables. Mark Levinson ml-2 mono are on the way and I will try them even they only have 25 watt per channel.

Great discussion group!! Thanks @thieliste @ronkent for the information!
I have 2_2 first, then 7.2, now 3.7 all together, and find them different in personalities. I had once audition with 5i with Jeff Roland 7f mono but was not very impressed because the music was somehow "heavy" not "vivid" to my taste. I don't know if I misunderstood 5i's potential or not. But I like 7.2 more than 5i based on that experience.
I am very glad to hear the progress of upgrade kit of 3.7. I just had my mid-range drivers of 7.2 rebuilt by Rob. There were some materials degraded as time went by. The rebuilt was done. I will do soldering soon by myself, but kind of worrying about my soldering skill will mess up the 7.2 or not. Although Rob told me that's straight forward. And I use WBT solder, I don't know if it's ok.
One more interesting thing, I was told that Jim Thiel once said it would be better if someone got 2 pair of 7.2s to sit back to back (one face front  and one face wall). To eliminate reflex? Any idea?
Happy Weekend!

Tom, very interesting! Could you describe more about your gears to run cs 2 2s and 1.5s? And how to position them (distance against walls and each other)? Thank you^_^!  I always think about two identical  pairs for back-to-back and not know it's ok with different models. If I use 7.2 and 3.7s, will they match each other?