Pars Posted May 8, 2019 Report Posted May 8, 2019 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? Quote
Thai Tao Posted May 10, 2019 Report Posted May 10, 2019 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. Quote
randytsuch Posted May 10, 2019 Report Posted May 10, 2019 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. Quote
lkong Posted May 22, 2019 Report Posted May 22, 2019 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. Quote
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