Thiel Owners

Jacksky -  nearly all CS5s have been converted to CS5i with upgraded lower midrange, woofers and subwoofer. Rob @ Coherent Source Service has conversion kits for your drivers. I suspect that your exaggerated / loose bass may be caused by the near 1 ohm infrasonic load and sub 2 ohm load through 50 hz. If you have two 7bs, you could split the woofers and run them with one channel and the upper 3 drivers on the other channel.

Rules & Unsound - I, for one, would be very interested in looking in on your discussion. Rules, I commend your work highly. Nicely done, both the work and the report.

@thielrules, the differences are only personal, not a criticism of your choices. I understand your choices, but I would have liked to have used the OEM drivers and used a flat response.

@thielrules,

What an impressive undertaking and write-up! I must confess that I lack the knowledge required to judge the success of many of your choices in making mods on the original 3.5 design. My negative experience with equalizers in the past makes me hesitant to depend on EQ to fix problems in replacement drivers or make decisions on a "house sound," but I have absolutely no experience with modern digital EQ so I am not in any position to offer an informed critique.

Above all, I will be very interested in what the speakers now sound like. Please let us know your listening impressions as you log some serious listening time with your "renewed" speakers. Thanks for sharing all this great information!

Unsound, the OEM drivers are no longer available, nor can the mid-range be rebuild. Tweeters of dynaudio are still available used. The bass equaliser of the 3.5 is prone to damage from static electricity, and Rob is out of parts to repair them. Fortunately all of this can be managed with dsp and the 3.5 have a new lease on life.