SUGGESTED ENCLOSURES
Infinite Baffle
∙Excellent performance for all types of music at moderate levels
Sealed
∙ 1.5 ft3 - Good linear response, excellent small enclosure. Excellent for high SPL, multiple driver applications.
∙ 2.0 ft3 - Good linear response, excellent all around | Sealed (S) | ||||||||
enclosure. |
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Vented |
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∙ 3.25 ft3 @ 27 Hz (Two 4" x 19.75" ports) - High output with |
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good low frequency extension. Good small enclosure. |
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∙ 6.7 ft3 @ 21 Hz (Two 4" x 15" ports) - High output with |
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Vented (V) | |||||||||
excellent low frequency extension. Great for Rock music | |||||||||
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or home theater applications. |
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which is tuned to resonate at a specific frequency.
Sealed Bandpass Enclosure
Sealed bandpass enclosures enclose both sides of the
woofer(s). An airtight enclosure is built around the front and back of
ProsCons
∙ High power handling | ∙ Low power handling |
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| within the operating | beyond the tuning |
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| frequencies | frequency |
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∙ Very high output within | ∙ Poor to moderate |
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| the range of the oper- | transient response |
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| SEALED BANDPASS | |||||||||||||
| ating frequencies | ∙ Poor low frequency | ||||||||||||
| the woofer and one | |||||||||||||
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| extension | ||||||||||||
a specific frequency. |
| chamber is ported to | ||||||||||||
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CALCULATING (NET) INTERNAL ENCLOSURE VOLUMES
When constructing any type of enclosure, you must be aware that the outside dimensions DO NOT represent the true (Net) volume inside. Such things as woofers, ports, thickness of enclosure material, dividing walls, and any internal bracing will reduce the total amount of the actual air space available. The following worksheet has been designed to provide you with the necessary steps to accurately calculate the absolute (Net) internal volume of any given enclosure.
Calculating Cylindrical Port Volume
1.Measure the outside diameter of the port and divide by 2 for the radius.
2.Square the radius and multiply by 3.14 (π) to arrive at outside port area.
3.Multiply the area by the length of the port inside the enclosure for the port volume.
length inside |
enclosure |
outside |
diameter |
8 | 5 |