no jumpers to adjust the analog output, but, using a balanced>unbalanced cable will reduce the signal by -6
this chart is in the V3 manual...(balanced and unbalanced are the analog outputs)
LED dBFS BALANCED UNBALANCED
------------------------------------------------
red 0 +25 +19
amber -3 +22 +16
amber -6 +19 +13
amber -9 +16 +10
green -12 +13 +7
green -15 +10 +4
green -21 +4 -2
green -27 -2 -8