Preliminary
SPECIFICATIONS & THIELE/SMALL PARAMETERS
Freq. Response | |||
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 in3 | 180 in3 | 200 in3 |
Coil length (mm) | 31 | 36 | 36 |
Coil diameter (in) | 2 | 2.5 | 2.5 |
SELECTING AN ENCLOSURE
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 |
| Cons |
∙ | Excellent low frequency extension | ∙ | Lower power handling |
∙ | Excellent transient response | ∙ | Low to medium efficiency |
∙Uses almost no trunk space
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 | Cons |
∙ Very good low frequency | ∙ Medium efficiency |
extension |
|
∙Very good transient response
∙High power handling
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 |
| Cons |
∙ Good low frequency | ∙ | Low power handling |
extension down to the |
| below the tuning |
tuning frequency |
| frequency |
∙ High power handling down | ∙ | Almost no output |
to the tuning frequency |
| below the tuning |
∙ Higher output than sealed |
| frequency |
enclosures |
|
|
3 | 4 |
