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John Curl's Blowtorch preamplifier part II
John Curl's Blowtorch preamplifier part II
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Old 15th November 2012, 03:44 AM   #29321
RNMarsh is offline RNMarsh  United States
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John Curl's Blowtorch preamplifier part II
Default No doubts

Quote:
Originally Posted by kgrlee View Post
So Mr. Marsh, I don't only design teeny speakers without bass.
I had no doubts that you could do so if you tried (and you have). but it doesnt help me if the speakers are in a church. What can I buy that works without costing the entire earths wealth?
Right now, I have a pair of TC-Sounds 5400 Ultra drivers (18") waiting for winter project time to arrive (soon). Thx-RNM
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Old 15th November 2012, 06:06 AM   #29322
Wavebourn is offline Wavebourn  United States
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John Curl's Blowtorch preamplifier part II
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Originally Posted by RNMarsh View Post
I had no doubts that you could do so if you tried (and you have). but it doesnt help me if the speakers are in a church. What can I buy that works without costing the entire earths wealth?
Right now, I have a pair of TC-Sounds 5400 Ultra drivers (18") waiting for winter project time to arrive (soon). Thx-RNM
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Old 15th November 2012, 07:04 AM   #29323
kgrlee is offline kgrlee
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Originally Posted by RNMarsh View Post
What can I buy that works without costing the entire earths wealth?
More than 10 yrs is a long time to be out of the game so I don't know. Speakers are very personal so what you like is more important than what ANYONE ELSE says.

Do you use & like your ELS63s these days? Perhaps try some of the specialist Dipole subs for it. Very sad that this millenium, very few shops have good demo facilities and even fewer will let you take speakers home for a day or two on approval.

I'm glad you don't subscribe to the false "one sub is good enough" philosophy.

It's a bit too late but the big 18" units will require a HUGE box to perform well; probably best wall mounted. If the same magnet & motor was on a 12" unit, you could get the same performance from a much smaller box. Thiele & Small were academics so their stuff tends to hide these useful tidbits.

The organ sub was 2x10" units in a 90 ltr box which amazed the organ builders who had used much bigger boxes & units from other makers with worse results. But the magnets were off 15" high power units so nearly as big as the little cone. It's a power/weight thing .. similar to horns but I better shut up or John will .... mmm..ph!
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Old 15th November 2012, 04:58 PM   #29324
DDB is offline DDB  United States
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Default Taming Ampzilla

Walt Jung has recently posted his 1975 "Taming Ampzilla" article from AA per JC's request.

http://waltjung.org/PDFs/Taming_Ampzilla.pdf
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Old 15th November 2012, 05:24 PM   #29325
ANADIGIT is offline ANADIGIT  Europe
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New member in my home, JC 2 :-)
I don't know is this model a BLOWTORCH LINE STAGE section ?

Thanks
Anadigit

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Old 15th November 2012, 05:34 PM   #29326
john curl is offline john curl  United States
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This is the CTC Blowtorch preamp:
Attached Images
File Type: jpg ctc blowtorch open.jpg (99.0 KB, 134 views)
File Type: jpg 1302013687.jpg (43.0 KB, 127 views)
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Old 15th November 2012, 05:48 PM   #29327
ANADIGIT is offline ANADIGIT  Europe
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Default Line Stage

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Originally Posted by john curl View Post
This is the CTC Blowtorch preamp:
Do they use different Line Stage topology ?

Thanks
Anadigit
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Old 15th November 2012, 05:55 PM   #29328
Esperado is offline Esperado  France
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Quote:
Originally Posted by john curl View Post
This is the CTC Blowtorch preamp:
Did-you tried constant impedance resistance arrays to get rid of potentiometers ?
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Old 15th November 2012, 06:41 PM   #29329
miklos is offline miklos  Hungary
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Quote:
Originally Posted by Esperado View Post
Did-you tried constant impedance resistance arrays to get rid of potentiometers ?
I'm might be not right person to answer this or any other questions on this forum, but somewhere in the 29000+ letters of this thread buried a short discusion about volume controls and among others John Curl contributed his views to. If I remember correctly he said, and this is not a quote: he first preferred wire wound volume controls for his home system, but later changed to something other, the rest I don't remember (you really need a team to find anything in a thread like this). I wouldn't be able to buy it anyway, but you can be sure that pot in the Blowtorch is a good one. After all this amp is carved out of a big block of aluminum with tender loving care and cost no object.
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Old 15th November 2012, 06:51 PM   #29330
john curl is offline john curl  United States
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OF COURSE, ANADIGIT! '-)
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