John Curl's Blowtorch preamplifier part II

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I better not show those to my wife she'll want all of them in the livingroom. Those Raal full ranges were special though, did they ever sell a pair?

I have no idea, if they sold or not. I just went to see what was there, took pictures and went home. The best sound was from that white German horns with plasma tweeter and isobaric woofer.

For my wife I put line arrays in walls, and concrete horn sub under the floor. 🙂
 
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The best sound was from that white German horns with plasma tweeter and isobaric woofer.

Missed those, you bring up good questions here (one reason I built my one stage open loop RIAA). The interlocking issues with feedback around multiple stages and taming all the possible problems and more importantly distortion vanishing with input level are worth exploring. Everyone should just listen.

I saw an insane circuit presented at the ISSCC where there was 160dB of gain over the audio band and piles of nested feedback to make it stable. It never saw the light of day.
 
The first computer I used was a Bendix G-15D. Drum memory and a high speed paper tape reader.

https://en.m.wikipedia.org/wiki/Bendix_G-15

Must be one of the best sounding computers as it was vacuum tube!

The best sounding main frame I ever heard was an ICL model, where some bright spark had created a pack of cards to make the CPU play telstar on the monitor used to see if it ever got stuck in a loop.
 
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