L ------------R
55 - 250 - 15
55 - 500 - 15
45 - 1000 - 10
50 - 2000 - 15
50 - 3000 - 40
50 - 4000 - 40
50 - 8000 - 35

WRS = 100% at 75db L; 100% at 50 dB R