Bowers & Wilkins CCM646S Owner's Manual And Warranty page 3

Frequency response
dBSPL
100
95
90
85
80
75
70
65
60
55
50
20 Hz 50 100 200
dBSPL
90
95
90
85
80
75
70
65
60
55
50
45
50
55
60
65
70
75
80
85
90
95
-90
500 1K 2K 5K 10K 20K