A weighting measures 500 Hz to 10 KHz used to measure noise
C weighting , 32 Hz to 10 KHz used to measure SPL of music
the RS digital SPL defalt is C weighting
RS SPL measures BOTH continous average SPL and continous MAXIMUM SPL, defalt is average
I used C weighting because the RS meter onwers manual so directs, and my crossovers use C weighting for set up.
Really shouldnt we all? You are all useing the RS digital, any one read the manual besides me?
the charts are A weighted, for noise, not for music.
also the 2000 watts (times two) is the rated maximum continous minium, I never use close to the max min, (obviously the minimum continous output is 0 watts) volume turned down