Diamond Audio Technology CM3 12D2 User Manual
Page 2
Massive Double Stacked Magnet - high excursion, maximum efficiency
Cmax
TM
Optimized Spider and Edge allow long throw and controlled braking
Integrated Rubber Trim Gasket - seals driver for front or rear mounting
Symmetrically Balanced Suspension - controls high excursion yaw.
Radial Vented Basket - uses venturi effect to maximize cooling efficiency
3 Year Warranty - if sold and installed by an Authorized Diamond Dealer
On the facing page you will find Thiele/Small data and suggested enclosure
volumes for Diamond CM3 Subwoofers. The enclosures specified here are offered
as a suggestion only. Since enclosure design is as important to sound quality as the
speaker itself, it is recommended that your Authorized Diamond Retailer assist you
in designing and building an enclosure to suit your vehicle.
For more information on selecting the best subwoofer enclosure, visit the FAQ page
of our website, www.diamondaudio.com
Diamond's CM3 Series subwoofers are primarily designed for use with small sealed
enclosures. Good results have also been achieved in vented and bandpass enclosures.
HIGH PASS ("SUBSONIC") FILTERS MUST BE USED WITH NON-SEALED APPLICATIONS
TO PREVENT OVER-EXCURSION AT FREQUENCIES BELOW PORT TUNING.
The enclosure volumes shown opposite are NET INTERNAL VOLUMES. Driver, vent
and brace displacement must be taken into account when designing your enclosure.
INSTALLATION
DIMENSIONS AND VOLUME
FEATURES
DIMENSION
A (Bolt Circle dia.)
B (Outside dia.)
C (Height)
D (Thru Hole dia.)
Displacement (L)
CM3 08
197mm
216mm
105mm
188mm
0.92 L
CM3 10
245mm
262mm
143mm
233mm
1.69 L
CM3 12
298mm
315mm
158mm
282mm
2.22 L
CM3 15
370mm
390mm
188mm
354mm
3.63 L
METRIC DIMENSIONS
DIMENSION
A (Bolt Circle dia.)
B (Outside dia.)
C (Height)
D (Thru Hole dia.)
Displacement (Ft
3
)
CM3 08
7.755"
8.503"
4.133"
7.401"
0.0325
CM3 10
9.645"
10.314"
5.629"
9.173"
0.0596
CM3 12
11.732"
12.401"
6.220"
11.102"
0.0784
CM3 15
14.566"
15.354"
7.401"
13.937"
0.1281
IMPERIAL DIMENSIONS
Model
SPL
Qms
Qes
Qts
Fs (Hz)
V
as (L)
Cms
Mms
Sd (m
2
)
BL (T
.M)
Re ( )
Xmax (mm)
Znom(Series)
Vb (Net vol ft
3
)
F3 (Hz)
Pe (W
atts)
Qtc (@ max power)
Vb (Net vol ft
3
)
F3 (Hz)
Fb (T
uning freq.)
Pe (W
atts)
Ports
Port I.D.
Port Length
CM308D2
83
6
0.65
0.58
46
7.5
0.133
80
0.020
11.5
3.3
7.75
(.305")
4
0.27~ 0.68
65~58
500~250
0.9~1.2
0.4
46
49
400
2
2"
15"
CM308D4
83
6
0.63
0.57
49
7.4
0.132
80
0.0200
16.6
7.0
8.15
(.321")
8
0.27~ 0.68
65~58
500~250
0.9~1.2
0.4
46
49
400
2
2"
15"
CM310D2
84
6.9
0.61
0.56
40
14.0
0.091
170
0.0330
15.1
3.2
11
(.433")
4
0.50~1.0
58~52
500~300
0.9~1.2
0.75
42
41
400
1
3"
13"
CM310D4
84
5.9
0.70
063
42
13.3
0.086
168
0.0330
20.1
6.4
12
(.468")
8
0.50~1.0
58~52
500~300
0.9~1.2
0.75
42
41
400
1
3"
13"
CM312D2
86
6.2
0.72
0.64
38
28.8
0.085
213
0.0490
15.2
3.3
11
(.433")
4
0.6~1.2
55~46
500~300
0.9~1.2
1.5
43
38
400
1
4"
13"
CM312D4
86
6.4
0.79
0.70
40
26.8
0.0792
200
0.0490
20.3
6.4
12
(.468")
8
0.6~1.2
55~46
500~300
0.9~1.2
1.5
43
38
400
1
4"
13"
CM315D2
88
8.0
0.69
0.64
30
86.6
0.0977
288
0.0790
16.1
3.3
11
(.433")
4
1.2~2.0
47~40
500~300
1.0~1.2
4
42
38
400
1
6"
9"
CM315D4
88
8.0
0.75
0.68
30
82.6
0.0938
300
0.079
22.0
6.4
12
(.472")
8
1.2~2.0
47~40
500~300
1.0~1.2
4
42
38
400
1
6"
9"
THIELE/SMALL P
ARAMETERS
SEALED ENCLOSURE
VENTED ENCLOSURE