Thiel Owners

Cat - for the record, I agree that a subwoofer solves many problems. And for the record, Jim also agreed, but we weren't ready to address subwoofers at that time in our development and, especially then, subwoofers were routinely badly implemented. My reason to keep it in the R series is a tribute to history, the integrated solution at the time.
Note that sans EQ, the sealed bass rollout of 12dB/octave will behave very well with bass management systems.

Andy - I haven't seen the CS6 XO, but can comment generally. Jim employed all pass filters - Zobels and custom - to counter rising impedance with rising frequency as well as shaping networks to trim each driver toward its theoretical optimum response. Over the years, including the first-tier New Thiel period, reviewers, dealers and other knowledgeable folks would counsel Jim to scrap all that stuff. He was steadfast in his desire to create an ideal resistive load. The "amp problem" would be far worse if Thiel's low impedance x first order were to introduce the additional burdens of reactivity.

Our present 'R' approach (Beetle's 2.4s and my PP & 1.6 experiments) is to upgrade all those components. The degree of audibility of parallel / shunt / non-series feed components is far greater than generally believed. Improvement can be heard via a higher voltage cap of the same construction - even in circuits that "don't matter much".

I would appreciate seeing the XO picture and especially comments from you and our other DIYs. 'The veil' is quite delicate and expensive to address.

Hi Tom,
Here is the link to the xover picture.  Based on the website, it is supposed to be a CS6 xover picture.  I was afraid of revealing possible intellectual property, but I guess since the website is public, it should not be an issue, at least from my stand point.

http://www.troelsgravesen.dk/vocals_files/cs6xover.jpg 
Thanks.

Andy - that's a CS6 XO alright. What a beast! I sent you a PM.TT

That photo is probably an early or prototype version which goes to shows and seminars. Typically it will morph through a year or more to match the actual settled particulars of its driver complement.
At first glance, coils are 4-9s, best of form. Significant improvement could be made via cap and resistor upgrades from AXON, electrolytic and sandcasts.
Beetle might have an opinion.
Cheers. TT