Thiel Owners

I looked into the Thiel subwoofer and was reminded by Rob that he can't service them if there ever is a problem. Fyi

As I mentioned, I am searching for a repair solution. A schematic would help greatly if anyone has one.

Noticed that the 3.5 has no internal braces like many of the newer models. Is that an issue?

Please keep exploring options to improve the 3.5 including sourcing a durable mid range driver. As Tom reported before, it's only time before we run out of replacement kits. Several options have been indicated in the past but the specs of the 13m1852 are unknown for comparison to my knowledge. Anyone tried an substitute driver?

rule - I would need some prompts to address the lack of braces. The 3.5 development dates from around 1987 - I am unclear exactly when. That's after our first CNC which is when the pierced shelf braces became feasible. I remember front-to-back lumber braces as well as the structural midrange tube enclosure which handle the heavy lifting. The baffle was 3" MDF laminated cross-direction. I remember a lumber transverse cross-brace in the lower area of the sides, but don't remember whether that made it to production. Memories fade. As a side note, the O3 and O3a & b had birch ply cabinets, but I think the CS3 &+ went to MDF. If I saw one I could reconstruct the picture.

The 3.5 pre-dated Stereophile's review analysis (or Thiel's ability to do so) so we don't really know the nature of its resonance behavior.