3
Preliminary
SPECIFICATIONS
&
THIELE/SMALL PARAMETERS
Freq. Response
29-500
25-500
22-500
Sens. 2.83v11 m
87.91
89.62
90.5
Impedance (nom. Z)
4
4
4
Rated Program Power
200
300
500
Fs
34
30
27
Qts
0.421
0.332
0.403
Qms
7.282
12.87
11.61
Qes
0.45
0.34
0.42
Vas (ft3)
0.59
1.12
3.14
Vas (liters)
16.7
31.6
89.0
Vas (m3)
0.017
0.032
0.089
Cms (umIN)
266.8
205.0
187.8
DCR (ohms)
2.91
3.2
3.18
Levc (mH) @ 1 KHz
0.6
0.75
0.75
BL (Tesla m)
10.63
15.77
14.84
Sd (in2)
32.6
51.2
82.2
Sd (m2)
0.021
0.033
0.053
Sd (cm2)
210
330
530
X max; one way (linear mm)
10.41
12.95
12.95
X max; one way (peak mm)
29.21
31.75
31.75
Vd (linear cm3)
218.61
427.35
686.35
Vd (peak cm3)
613.41
1047.45
1682.75
Vd (linear m3)
.00021861 .00042735 .00068635
Vd (peak m3)
.00061341 .00104745 .00168675
Mms (grams)
80.3
135.2
182.2
Magnet Assembly (oz)
128
224
224
Magnet Weight (oz)
44
84
84
Vf (volume of frame)
100 in
3
180 in
3
200 in
3
Coil length (mm)
31
36
36
Coil diameter (in)
2
2.5
2.5
4
There are several different enclosure designs for different applications.
The EXC subwoofers work very well in all the following enclosure
designs. It is up to you to select the specific enclosure that will work
the best for your particular application.
Infinite Baffle
Infinite baffle is the simplest type of subwoofer installation. In this type of
installation, the woofer(s) is mounted to a baffle, which is then mounted
to either the rear deck or back seat of the vehicle. The best results are
achieved when the trunk area is virtually airtight and isolated from the
passenger compartment.
Pros
•
Excellent low frequency extension
•
Excellent transient response
•
Uses almost no trunk space
Cons
•
Lower power handling
•
Low to medium efficiency
Sealed Enclosure
Sealed enclosures are relatively simple to build and install, as all that is
required is an airtight box. The larger the sealed enclosure, the more the
performance resembles that of an infinite baffle installation.
Pros
•
Very good low frequency
extension
•
Very good transient response
•
High power handling
Cons
•
Medium efficiency
Vented Enclosure
Vented enclosures use a sealed enclosure with a vent or port in the box
which is tuned to resonate at a specific frequency.
Pros
•
Good low frequency
extension down to the
tuning frequency
•
High power handling down
to the tuning frequency
•
Higher output than sealed
enclosures
Cons
•
Low power handling
below the tuning
frequency
•
Almost no output
below the tuning
frequency
SELECTING AN ENCLOSURE
