picture this...someone pulls up to your shop (or garage). They complain that they keep blowing up tweeters or woofers....or whatever. You plug in the new dd-1+ and probe the outputs. Without even touching his system settings, you can see what his overlaps are set at already. Don't be surprised if you probe a problem system and find someone +22db over and wondering why they can't keep a tweet On mids/highs i normally wouldn't want to be to much over 5db of overlap. So you fix him up, and record the NEW overlaps (say you chose 4db). Write that down and next time he shows up, you can probe it and see if anyone f#cked with the settings. If it says 8db, you know his "buddy" helped turn up the volume for him (aka turned his gain up). Warranty voided. I might include some round stickers to go over the gain pot so when you are done you cover them up and avoid temptation