Thiel Owners

brands like Thiel that stay on top of the cost/performance tradeoff are likely to have better products than the cost no object "luxury" brands

I agree but still wish that Thiel had a full-out assault on SOTA speaker. Not that I could ever hope to afford such a product but it probably would have informed new, cost-effective ways to coax (pun intended) even more performance from the 1s, 2s, and 3s. Maybe Jim Thiel had this in mind (cs7.3?) but left this Earth far too early.

At Parts Connexion, retail pricing for a Clarity SA 15 uF is ~$20 and 33uF is ~$46. *Every* CS2.4 could have had SA caps for, maybe, an extra $200 retail (tbf, I don't know that the SAs were available when the 2.4 was developed). No doubt Jim Thiel had very good reasons for his design decisions and I shouldn't second guess those decisions. But, IMO, an extra $500-2000 retail in better passive parts for the 2s and 3s could have elevated their performance to the next tiers. I'm going to test that speculation!

Pruning a brand niche is a very delicate endeavor. Imagine the confusions that result from differing implementations of various products within a brand. I will share that in the development of the CS5 in the late 80s, I wanted to go farther out on the quality limb and market that product in the $20K market (actually introduced at $9700 / pair.) I believe its ultra implementation would have been more than competitive at $20K. BUT, where does such a move leave the line / other products, niche reputation, etc? Perhaps two quality ranges? etc. etc. etc. As a small company, we couldn't cope with the variables. Toyota marketed their upmarket offerings in the USA as Lexus: same idea: different dealers, different image, different cost/performance ratios.

I have bought some nifty analysis software to guide me in this upgrade thing. I hope to find time to develop some solutions. The learning curve is cumulative, what is learned is applicable to other products. My first, stop is my PowerPoint 1.2s, upgraded via beetlemania's cap direction, coil replacement with legacy Thiel six-9s coils and wire, all in outboard XOs, and vetted with Metric Halo's SpectraFoo analysis software.

BUT, where does such a move leave the line / other products, niche reputation, etc?

Yes, tough decisions and I have no business armchair quarterbacking Thiel's choices. Speaking of the CS5, I recall reading on AudioAsylum that Charles Hansen regarded the 5 as Thiel's best model with the 3.7 a "close second". I'm curious to hear a pair.

I just took a look inside my CS2.4s. It was easier than I imagined (I was worried about getting the radiator back in) although a contortion is required to remove the radiator. From Rob Gillum:

To access the crossover, you must remove the passive radiator screws and let the passive radiator drop into the cabinet. It can be rotated 90 degrees, and removed while servicing. To re-install the passive radiator, you can place your fingers at the surround, pressing outward to hold in place while re-installing the screws that hold bit in place.

I discovered that the 33uF cap on the woofer is only 100V, not 630. This opens up the 33uF CSA 250V as a direct replacement, no bypass needed to get the correct capacitance, and for only $75 for a pair. I guess I could add a 0.01 ultra if I want to go crazy.

Also, I think I have room for most of the options I'm considering on the coax board. If I wanted a 10uF Supreme to match a 18uf CSA, however, I might have to mount the board a bit lower as that cap is 4cm longer than the CSA. From the top edge of the 28uF SA as seen here: http://www.hifishock.org/gallery/speakers/thiel/cs2-4se-2-thiel/
there is about 18 cm to the cabinet wall (just past the bottom of the board as seen in the image). Most of my Clarity options should fit with a bit of stacking. Additional protrusion into the cabinet is moot given the fiberglass bat on the two boards. The extant 14uF SA abuts the 6mH coil but I imagine the coil's orientation prevents deleterious interference. In my case, I will need to place a cap even closer to the coil although probably a shorter cap that should provide a gap to the coil.

Also, the boards easily unscrew from the cabinet and there is enough slack in the wiring to provide extra room to access the leads. Finally, it doesn't seem like a huge project to take everything outboard altho' I think I can fit everything internally. Looks straight-forward. Maybe I'll do this project sooner than April?

Thanks Beetle for doing all the legwork on those caps. That is almost exactly what I will do. I want to support Rob Gillum so I will try to see how I can do that with these caps. Probably be mid march or later though. Anyway it is nice to have this thread with that type of investigation and Mr Thiel's input. Thanks