![]() "Higher end" as compared to an AV or integrated amp that includes a phono stage for the same money, that is. Don't even know if that uses transformers or a higher end electronic solution. Instead, they make an accompanying phono stage that runs another ~$600-$700. And also why they chose not to include a phono stage in said IA. ![]() And likely any other manufacturers products in the same price range. Welp, I suppose this rules out line in/out transformers in my ~$700 Cambridge Audio stereo integrated amplifier. Go with Jensen's if you don't need as much serious isolation, but need a tighter flatter response. You go for Lundahl if you want extra serious voltage isolation or different gain and multi-output configurations. Lundahl also has many more configurations and an excellent IV transformer/or/MC phono cartridge adapter (1:32 output if I remember) for use as the IV stage in current output audio dacs making your voltage output. Though the Lundahl aren't so perfectly flat from 1hz to 50khz, instead of 250vac isolation, they have 2-4kvac isolation. The 70$ transformer operates from 1hz(-1db) to 50Khz(-1db), measured, and has a CMMR of 107db. What do you expect the performance of Digikey's 5$ transformer is at 20hz if it is already at -1db at 660hz? And Digikey's transformer is only sensitive from -45dbm to +10dbm. Compare that to Digikey's 5$ 600:600ohm transformer, 660hz to 3.5Khz, +/-1db. A measured spec of 20hz through 20khz, with a flatness response +/-0.05db with a +21dbu range through an isolation transformer is one thing which is not snake oil, it is ridiculously difficult to achieve.
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