I've never seen my 3808 or 2805 set the trims that high, I suppose it will vary from room to room. I think my 2805 went up to +20dB on the main dial, so even if the 80's were set to +12 for the trim level, it would still go upto +8db when cranked.

M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85