So your cable pad now gives a 19dB attenuation?
Yes - it's on the xlr end. I realized yours was just on the other end last night. Sorry for the confusion!
I made it unbalanced which gives -6db (from the V3 manual). I used 1.5k and 330 (1473 & 323 after some handmatching) to get another 13dB. Now, I'm going to build some nicer cables with final values 301 and 1.5k - done twiddling -20dB will nail it.
Here is Mikes old drawing again. I changed the Rs and tied pins 1 & 3.
BTW Mike, if I brought in my amp could you change the output drive by -20dB, or is that harder to do than say?? Also, it seems a lot easier to make the pad on the XLR end. Does that pose a problem?