I've been told by a few audio manufaturers of amps that you can't totally trust the RS meter. You would need a more sophisticated meter like used in labs that cost lots more and respond much faster. Usually if a song has a 20dB spike, the RS meter will only respond as seeing 10dB.

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