Tonight test, it's Focusrite input stage now....
Here the little circuit I made for the test:
I was playing with the sig gen amplitude to see how and when the Focusrite input was saturating/clipping.
I measured this between pin 2 and 3 in the XLR on my trusty DMMM7510:
when the Focusrite led input was on the edge between yellow and red (clipping edge). Note the preamp input pot almost at 100%.
No wonder I have to set the pot preamp input to 100% to hear something from the mic.
Details:
- both inputs same story
- INST mode on/off and or Phantom on/off did not change anything.
- 1KHz tone was clear enough to my hears
Tomorrow I will do the test with the headphone if necessary.
Now I have to do my homework to check the XLR balance signal specs.