May 8, 20197 yr Any of you ever across this stuff? Discrete opamps and 78xx/79xx Vregs? https://sparkoslabs.com/ Wonder if the regs are any good and how they compare to Amb's o78/o79?
May 10, 20197 yr On 5/8/2019 at 9:32 PM, Pars said: Any of you ever across this stuff? Discrete opamps and 78xx/79xx Vregs? https://sparkoslabs.com/ Wonder if the regs are any good and how they compare to Amb's o78/o79? Sparkoslabs make solid stuff with very detail document. Amb o78/o79 implement tps7a4700/3301, the sparkoslabs output noise is 3uV at 5v compare to 4uV of tps7a4701, 16uV of tps7a3301, PSSR wise, the sparkoslabs win completely at 120db compare to 80db of 4700/3301.
May 10, 20197 yr FWIW, Allo used the Sparkos discrete op amp design in their Kantana Dac. From following really long Allo thread at diyaudio for a while https://www.diyaudio.com/forums/vendor-s-bazaar/294940-fifo-buffer-rpi-sbcs.html it seems that Allo does a lot of work on their designs, so I expect they tried a lot of options before picking the Sparkos. I also think I've seen good things about their voltage regs, but never tried them myself.
May 22, 20197 yr https://www.audiosciencereview.com/forum/index.php?threads/rolling-op-amps-in-gustard-h20-headphone-amplifier.7407/ Not sure if this test is comprehensive, it doesnt look too good for Sparko.
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