SELECTING AN ENCLOSURE
There are several different enclosure designs for different applications. The SPL 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 re- |
|
| sponse |
|
∙High power handling
SEALED
Vented Enclosure
Vented enclosures use a sealed enclosure with a vent or port in the box
SUGGESTED ENCLOSURES (Continued)
Sealed Bandpass
∙ Enclosure #54
∙ Rear = 2.8 ft3 sealed
∙ Front = 2.2 ft3 @ 55 Hz (Four 4" x 11.5" ports) - High output with good low frequency extension. Good for Rock or Rap.
Sealed Bandpass (SBP)
∙Enclosure #55
∙Rear = 1.3 ft3sealed
∙Front = 2.2 ft3 @ 77Hz (Four 4" x 3.25" ports) - Very high output. Great for Rap music.
Pros
∙Good low frequency exten- sion down to the tuning fre- quency
∙High power handling down to the tuning frequency
∙Higher output than sealed enclosures
Cons
∙ Low power handling below the tuning fre- quency
∙ Almost no output below the tuning fre- quency
VENTED
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