Quieter for me would be 64-69 dB. Louder would be 69-75 dB.
One factor that I've just experienced in the last several years is that a acoustically "quieter" room allows for lower actual listening volumes for the same perceived sound level.
One factor that I've just experienced in the last several years is that a acoustically "quieter" room allows for lower actual listening volumes for the same perceived sound level.