11
CAS 3.1/CAS 2.1
Enclosures
The internal volume of an enclosure is directly related to the
amount of low-frequency extension and output that can be
accurately reproduced by a loudspeaker.The CAS in-wall
loudspeakers were designed to use the typical wall cavity
dimensions of 8' x 14-1/2" x 3-1/2" for maximum low-frequency
extension. However, due to varying construction standards,
materials and applications, it is sometimes beneficial to create a
dedicated enclosure for the speakers. The charts below show the
internal volumes of sample enclosures and the resulting –3dB
points for each model.
It is important that the enclosures be well-constructed; MDF is
recommended. The enclosure should be securely mounted to the
adjacent wall studs. In addition, the enclosure should be filled
with fiberglass insulation so that the enclosure is full, but the
insulation is not compressed.
Thiele/Small Parameters
CAS 3.1
CAS 2.1
Total Q
Q
TS
0.71 0.72
Compliance Volume
V
AS
72.3 liters
43.1 liters
Free-Air Resonance
F
S
34.8Hz 40Hz
Mechanical Q
Q
MS
11.46 11.27
Electrical Q
Q
ES
0.76 0.77
Voice-Coil DC Resistance R
E
4.06 ohms
4.05 ohms
Moving Mass, Air Load
M
MS
34.79 grams
23.10 grams
Suspension Compliance
C
MD
601um/N 671um/N
Motor Force Factor
BL
6.39 Tesla-M
5.56 Tesla-M
Driver Radiating Area
S
D
0.0293m
2
0.0214m
2
CAS 3.1
CAS 2.1
Internal
–3dB Internal
–3dB
Volume
Frequency
Volume
Frequency
2.7 cu. ft.
32Hz
2.7 cu. ft.
40Hz
1.35 cu. ft. 38Hz
1.35 cu. ft.
45Hz
I
NSTALLER
I
NFORMATION
