Thiel Owners

Correct,  I meant the driver frames, the results will be easy to check when unplugging the ground connection.

Btw, sorry for my crooked English.

Tom, I feel really good about your balanced, sensible approach to both theoretical and practical considerations to increase audible sound quality. I have become more cautious with assuming that when people make claims of improved SQ they have done their homework. Please include double blind comparisons to establish audible differences.

Rules - I appreciate and concur with your concerns. You would be pleased to know the level of verification we employed at Thiel. Serious science.

But there is this other dimension. In my acoustic guitar design and archival recording I have identified an accumulation factor. Recording engineers and piano techs and other technical artists also experience this phenomenon. When on a particular path of exploration, guided by both cognition and intuition, there are many choices which are not provable or even discernible. But a conglomerate effect becomes identifiable / meaningful over time. There are so many subtle factors contributing to the overall result, that each of them could be ignored or over-ruled, but they can matter in their aggregate.

Tom, I noticed in one of your recent posts concerning internal wiring that Jim settled on 18 awg solid core.

I find the decision for 18 gauge very interesting.  Bell Labs and NBS research culminating in the early 1930s determined 18 gauge the optimum conductor cross section depth for the transmission of audible audio frequencies.  This early research comtemplated both skin effect behaviour at higher frequencies and core transmission behavior at lower frequencies.  

Matthew Bond confirmed the same conclusion in the early 1980s.  However, it appears that Jim’s decision for 18 gauge even predated Mr. Bond’s work.

This indeed underscores your point that meaningful and established physics and engineering research was the primary guide for Thiel Audio’s materials selection.

While a heavier gauge in a single conductor may allow a higher ampacity, I am curious how signal response across the contemplated frequency range through such increased conductor cross section would be impacted.  Perhaps a multiple optimum conductor scheme would be a more desirable arrangement under such circumstances, or over longer distances where such frequency distortions are compounded.

All of this seems to reinforce a common EE maxim that even a straight wire distorts an audio signal to a degree.

"esprits4s
Thank You for your assessment of the XP-10. Which ARC pre-amp did you purchase?   "
Jafant,
It is a Reference 3.
-Gary