Pioneer PDM-4001 Technical Manual page 106

Mounting standard metal fixtures (PDM-4001)
Reference drawing of 2 x 2 = 4-surface multiple installation
919
1838
B
291
A
Figure 4.11.5-7)
Reference drawing of 3 X 3 = 9-surface multiple installation
1838
B
2757 291
A
Figure 4.11.5-8)
106