Yes, exactly. The 75 dB is a calibration, but not what you are hearing at reference volume 0 for movies. All DVD's will vary, but typically dialog will be about 80-85 dB, and peaks (explosions, etc.) will be over 100 dB (110 dB or more can be common).

-Dave

M80s VP150 QS8s EP500s
ravenmanor.com/cinema/