User Manual

4 • English
PRO.BOSE.COM
Design Worksheet
Design Worksheet
Use the following worksheet to create a design using Bose Professional loudspeakers.
Choosing a Model
Step 1: Loudness
Maximum SPL Capability
Confirm that your chosen loudspeaker model will meet your loudness requirement. Find your ceiling height
and follow the column down until you reach your desired maximum continuous output level. Models with a
higher sensitivity and higher tap settings will be able to play at higher levels. Individual model tap charts are
available at the end of this document.
Example: For a ceiling height of 5 meters (16 feet) in a project that requires 90 dB, you would choose FS4CE.
In-ceiling Models: Maximum Continuous Output Level
Ceiling Height m 2.4 2.7 3 3.7 4 4.3 5 5.5 6 6.7 8 9.8
ft 8 9 10 12 13 14 16 18 20 22 26 32
DM2C-LP
9W tap 94 92 90 87 86 85 83 82 80 79 77 75
dB-SPL
16W / 16Ώ 97 94 92 89 88 87 85 84 83 82 80 78
DM3C 25W 98 95 93 90 89 88 86 85 84 83 81 79
FS2C 16W 99 96 94 91 90 89 87 86 85 84 82 84
FS4CE 40W 105 102 100 97 96 95 93 92 91 90 88 86
DM5C 50W 105 102 100 97 96 95 93 92 91 90 88 86
DM6C
80W 108 105 103 100 99 98 96 95 94 93 91 89
100W / 8Ώ 109 106 104 101 100 99 97 96 95 94 92 90
DM8C
80W 111 108 106 103 102 101 99 98 97 96 94 92
125W / 8Ώ 113 110 108 105 104 103 101 100 99 98 96 94
Note: The above table assumes standing ear height at 1.5 meters (5 feet), in minimum overlap configuration.
Room reverberation could add as much as 4 dB system gain, which is not factored into the measurements
above. Use of the transformer on 70/100V systems will introduce an insertion loss of 1 to 2 dB.
Step 2: Ceiling Height
Average Conical Coverage and Woofer Sizes
Smaller woofer models have wider average conical coverage and provide better results in low ceilings. Larger
woofer models with narrower average coverage angles are better suited for higher ceilings. Choose the
models that will work with your ceiling heights and rule out the other models.
Mounting Height
SPL Range (at listener height)
<75
8
2.5m
ft 16
5
32
9.7
85
95
>105
DM5C, DM6C, DM8C
FS4CE
DM2C-LP, DM3C, FS2C