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Input impedance of DI with an input pad

I’m in the process of considering my options for building a DI, an the issue of the pad has me confused. Mostly I’m basing myself off this schematic: http://jensen-transformers.com/as/as066.pdf So the above DI would show you a respectable input impedance of 140k (loading a 1k input imedance preamp)

By cbc459 (Gearslutz.com)

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