I just spent over $6000 on SR products, 2-10 packs of HFTs, 2 packs of speaker HFT/2.0/X kits, a Blackbox and an Atmosphere XL4. After an agonizing 2 weeks placing the HFTs 90% in the recommended positions and 3 which drove me nuts to find out how to balance the room, I was finally able to add the Blackbox and Atmosphere to the mix and achieve the soundstage, dynamics, tonal warmth and detail that I wanted.
However, prior to adding the SR products, I spent $300 for TC and applied it to nearly all contacts in my main listening room system. The TC brought out detail, bass and soundstage that I lacked in that room but not in my living room. Now that I have incorporated the SR equipment, there is no need to experiment and see what would happen without TC. I’m satisfied with the end result.
My friend who is an audio engineer told me that it was the TC that was messing up my sound. Well, now that I finally got the SR tweaks to work correctly (the Blackbox is 5’ from the front wall, not along the walls as in the instructions and the Atmosphere is behind me on the back wall, not in front of my speakers which does provide the most profound differences but blocks the soundstage in my room), I think he is wrong. The proof is in the pudding. His system is a small, 8' high room with acoustic tiles with a 2 way mini-monitor speakers with 4" woofers (they go down to 20 Hz but don't slam you with bass) with the same equipment/wiring as mine. Sure he has a fantastic sounding system but a grand piano doesn't sound as big in his room as in my room. My speakers are 4 way with 7 drivers and 6-12" woofers. Really tough to adjust that type of speaker to my larger room
As for the SR tweaks, Dave at Weinhart Design said these tweaks and tuning each individual room is an art, not a science. It takes a great deal of commitment to work on achieving the right balance. I kept experimenting until I got the tweaks to work. My music room has problems which needed solving (slap echo, wide front wall windows mid-wall height, large cathedral ceiling).
I highly recommend trying the TC. If you are lacking in bass, soundstage and resolution, it appears to cure the ailment.