Pro Audio Design Forum

"The Effect of DC Current on Power Transformers," Zeimer, 2004. Big power transformers... There are a host of adverse effects that can accompany the presence of a direct current in a transformer’s windings. The predominant effect that is witnessed is half cycle saturation. This leads to increased h...

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I ask because the 1510/1512 can't directly drive low impedance loads at elevated level and the datasheet doesn't even show an output build-out resistor.

What was the load on the 1510 ICs during the tests?
Was it buffered?

I think using the 1606 is a great idea. By using the differential input of the 1606 you can realize a common mode rejection ratio that's typically 60 dB. TransAmp Documents: https://www.proaudiodesignforum.com/forum/php/viewtopic.php?f=12&t=114&p=894 Pontis Output: https://www.proaudiodesignforum.co...

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I received a second Focusrite Scarlett 2i2 and it has good common mode rejection:



Left channel CMRR 68 dB; Right channel 58 dB.

I'll use the first unit in an unbalanced environment and use the "good" 2i2 on the work bench.

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I've been using the Focusrite Scarlet 2i2 as my test and measurement front-end and found a quirk that users should be aware of. The left channel of my 2i2 has very poor common mode rejection: https://proaudiodesignforum.com/images/jpg/Focusrite_2i2_CMRR.jpg The left channel CMRR measures 13.5 dB; t...