John Curl's Blowtorch preamplifier part II

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canyoncruz

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I have two of the songs, one really gets hit and makes my place smell like electronics. For a project I want to An audio stage between some cinema transformers and better power supplies. I was planning on using op amps! Would like to tap into the i2s and maybe have a cool Analog .enter for signal strength. I have the schematics for all four creations of the tuner. The PCB for the car version is most interesting. Lots of bias wverywhere
 
DavidL

DavidL

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a.wayne said:
You have to measure more than one parameter to draw any conclusion, he only gave one and refused to expound on his procedure , because he has none. Audio is about objective and subjective evaluation, he qoutes FT, yet misses the irony
Of the evaluatory process ...
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The irony is you have never measured anything yet think your subjective opinion has all the value. :p So what have you done to ensure that the cables you listened to were neutral oh great one? :rolleyes: Come on, now is your time to shine and show us all.
 
gpapag

gpapag

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john curl said:
I see nothing wrong with this discussion. This stuff is over 40 years old.
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Joachim appropriately credited the origin of the topology to you and put your name on every drawing.

Why should there be something wrong? I didn’t mean that.
My question had to do with your opinion about the simplicity vs operation of this pre- preamplifier.

As long as the semiconductors are not obsolete, who cares if it is old stuff?

George
 
DavidL

DavidL

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H E Pennypacker said:
Speakers are made from cables, so it stands to reason that both follow similar physics.

I myself have a hard time digesting two cables measuring the same yet sounding different. I suppose I need to experience the comparison.

However that will never let that happen. You can't have two identical sized awg cables made of different materials that perform the same.
Silver is always going to be a touch more conductive then copper, both are substantially more conductive then aluminum.
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You missed what I meant. Speakers that measure flat on axis can still sound different off axis. Differences between the polar radiation patterns of 2 ways versus 3 ways on up. 1st order versus 6th order crossovers will change the sound. Butterworth versus Linkwitz crossovers will differ. Decay rates of the sound from different sized cones or materials. What sort of wire is used in a voice coil is moot. The sound comes from the cone/dome movement. The speaker and room acoustics are the very last frontier where there are still big differences in the sound.

Yes you can have cables made from different metals that measure flat and sound the same. If they transfer the signal unaltered from point A to point B then how can the sound differ? If the frequency response is flat and distortions small enough then the cables are doing their job and will sound the same.

I have had enough wasting my time here in this thread so have fun boys.
 
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