Re: DEH-P780MP complaint...
All Pioneer product HU's have this now. The trick is to not rip on it. As far as my deck went, there was no sensitivity adjustment. If you need to quiet the unit quickly, use the ATT button, it usually quiets the HU enough, and then just turn it down from there. If you put volume up though, it returns to the original volume.
~Levi
EDIT: the SAT mode is what quiets on mine. Not ATT, that was my old Sony
2006 Subaru Impreza 2.5i
System Currently:Speaker Amp|Phoenix Gold Xenon 100.2 Sub Amp| Phoenix Gold Xenon 600.1 Deck| Pioneer DEH6800MP Frontstage| Alpine SPR-17LS "]Sub| Phoenix Gold Xenon 10"
Refs from Buyers:
Refs from sellers: Dre2390