I taped a multiple band show the other night when i first noticed the high z/low z button.
I taped the first band like I usually do, on low z.
However, for shits and giggles, i taped the second band on high z. Once I pushed the button, it had an immediate impact on my level readings. I was monitoring my levels thru the svu-2 as well as a MD because it's easier to read a MD.
As soon as i went high z, the MD levels went down and the svu-2 levels went way up, without any adjustment by me. I had no idea which one to trust (should have trusted the MD with it's digital connection, rather than my svu-2, but such is life). Ended up being scared I was now running too hot and recorded a very low show.
I run a warm mod ua5
fwiw.