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Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.

200 mV offset is low?

go to www.ti.com, in site search box type buf634, click on datasheet pdf from document list
2nd page top of data sheet: INPUT specs

Vos +/- 30 mV typ, +/- 100 mV max

add to this input bias current times DC input resistance

+/- 2 uA (max) * 47 Kohm ~ +/- 100 mV

total ~ +/- 200 mV worst case, could be a pretty good turn on thump

you need headphone spec for DC max

Glenn: learn to fish!


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