Soundstream Technologies Subwoofers Selecting AN Enclosure, Infinite Baffle, Sealed Enclosure

SELECTING AN ENCLOSURE

There are several different enclosure designs for different applications. The SPL subwoofers work very well in all of 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 Bandpass

∙Rear = 1.5 ft3 sealed

∙Front = .75 ft3 @ 48 Hz (4" x 13" port) - High output with good low frequency extension. Good for Rock or Rap.

∙Rear = .5 ft3sealed

∙Front = .75 ft3 @ 66Hz (4" x 5.25" port) - Very high output. Great for Rap music.

	100
	95
	90
	85
	80
dB	75
	70
	65
	60
	55
	50
	10	100	1000
		Frequency Hz

	105
	100
	95
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	85
dB	80
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		Frequency Hz

Sealed Bandpass (SBP)

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.

Infinite Baffle

∙Excellent performance for all types of music at moderate levels.

	Pros	Cons
∙	Very good low frequency ex-	∙ Medium efficiency
	tension
∙	Very good transient re-
	sponse

∙High power handling

Sealed (S)

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.

Sealed

∙.5 ft3 - Good linear response, excellent small enclosure. Excellent for high SPL, multiple driver applications.

∙1.0 ft3 - Good linear response, excellent all around enclosure.

	100
	95
	90
	85
dB	80
	75
	70
	65
	60
	55
	50
	10	100	1000

Frequency Hz

	100
	95
	90
	85
dB	80
	75
	70
	65
	60
	55
	50
	10	100	1000
		Frequency Hz

Sealed (S)

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 be- low the tuning fre- quency

Vented (V)

4

Vented

∙1.5 ft3 @ 33Hz (4" x 14" port) - Deep bass, flat response. Good small enclosure.

	105
	100
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dB	80
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	10	100	1000
		Frequency Hz	Vented (V)
		9