Hi Ian, thanks for the reply - thats just the headphone output level, has nothing to do with incoming pad trigger level.
My issue is that on the screen "TRG2" where you configure each trigger, the area that shows how much incoming trigger level the DTX500 is receiving only shows 20% when hitting the pad at a normal hit, and up to 30% if i hit the pad really really hard. (All the pads work perfectly when triggering my DTX400 brain).
Have been through every "pad type" option in the TRG2 page, makes no difference. Yamaha compatibility chart says to use pad type "TP65S" when using a TP70S snare pad, which corresponds to "SN-3" on the TRG2 page trigger type selection, but i get almost no input level with SN-3, the trigger type option that gets me the most level is "SN-7", but even then i only get 20 - 30% input level when hitting the pad hard.