Mike Caffrey wrote:
He're my reference.

referenced to what? the noise floor of the room? the threshold of
human hearing? "dB" is unitless and expresses only a ratio to
something.

When I first got a dB meter, I checked my guitar amps level when I
practiced alone and it was always above 90dB. I never found it
uncomforatble. His max is both far louder and when he's warming up,
uncomfortable to be around.

90dBSPL != 90dB of dynamic range. assuming he's playing in a completely
soundproofed anoechoic chamber with a noise floor of 0dBSPL, you would
see 90dB of range, but playing in a bar where the noise floor is likely
50+dBSPL, you'd only be seeing 40dB of range.

of course your meter may not be giving you the reading you're after.
A-weighting is pretty useless at high SPL levels, since the ear's
loudness curve flattens out at high SPL levels; C-weighing would be more
appropriate. also your meter may be giving you averaged readings where
you want peak.

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