Thiel Owners

Good Morning Tom Thiel and All Thiel owners

Update on the wiring of my 2.7 ,
I replaced the 15.5 with 17.5 awg wiring on the mid range of the coaxial
speaker to equalize the resistance , it sounded like the mid / treble
was louder or more pronounced .
It seems like without modifying the crossovers that whatever wiring 
one upgrades to the resistance should be the same for both ,
at the same time it can't be to low .
Measurement on the 15.5 was .2 ohms for 3 feet ,
on the 17.5 it was .3 ohms for 3 feet ,
the JSC 16 that was removed was .5 ohms for the 3 feet to the coaxial speaker .
I've contacted Cardas about their measurements for the
15.5 , 17.7 and 18.5 sizes , I'm sure they have more accurate readings 
than my SnapOn multi-meter .
I might consider trying the 18.5 but as of now I couldn't be happier 
with everything I'm hearing .

Tom what is the resistance measurement of the 18 guage Straight wire ? 

Rob

From Cardas
Ten feet of 15.5 AWG measures 0.1411 ohms.
Ten feet of 17.5 AWG measures 0.1638 ohms.
Ten feet of 18.5 AWG measured 0.1883 ohms.
Ten feet of 20.5 AWG measures 0.2279 ohms.

So little differences yet one can hear it .

Rob - I’ll get some measurements on my various wires. However, the resistance is not the whole story. In fact, audibility is a result of many factors and many of those are phase related. Two parallel tracks. A: lower resistance will change the frequency balance where it is operative, and B: all the other reflectances, skin effect, eddy currents, differential dialectic absorption, etc. will change many subtle things that audiophiles hear, but the engineering field ignores as insignificant. I suspect that more of interest is going on in B than in A. But changes in A must be corrected to maintain proper frequency balance.

As a historic note, Jim’s working rule was that focused listeners can hear 1/10 dB at an octave bandwidth. Lots of effort went into determining 1/10dB octave to octave frequency balance - anechoic flat. So he was bothered when "people" judged his speakers as having too much or too little of whatever frequency range. The intent was to be flat. Our fans tended to agree. Our detractors often criticized too little mid-bass and too much mid-treble.

My present experiments with wire and components and layout and baffle launch, etc. tend to rectify those criticisms without changing the measured frequency response. In other words, the criticisms may be caused by factors other than actual measured output. Of course, I don’t have a way to reliably measure differences of 1/10dB, so I’m flying far more blind than Jim was. Nonetheless progress is being made.

Tom

I agree with you on the " B " , I believe that is why  different wire 
manufactures and configurations create sonic differences .
The only measurement that I can go by is resistance ,
stating my opinion about wiring or what I am hearing has little 
quantitative value .

Rob

Gs5556  I owned 3.6s for 27 yrs I purchased cs7s last October my has a hairline crack by the woofer. When I contacted rob Gillum it didn’t seem like an issue. FWIW I use a Bryston 4 b which did a great job of driving the 3.6s but is now on the weak side of driving the 7s.ive never heard the 7.2s but the 7s are definitely an upgrade over the 3.6s!I can’t wait to get a bigger amp I feel they expose your equipment upstream and are going to get better as I upgrade my equipment! I agree with Tom as far contacting Rob just to make sure.