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Specification
AgeRangeDescription : Adult
AudioDriverType : dynamic_driver
AudioOutputMode : Stereo
Brand : HiQltyla
BulletPoint1 : 【Port Tubes Function】speaker exposes the speaker diaphragm to produce sound, and there is also vibration at the back of the speaker. After installing the port tubes,as the diameter of the port tubes is smaller than the diameter of the speaker, a relatively strong sound wave will rush out of the inverted tube. the sound waves towards the front and back of the speaker are utilized, Improve the sound quality of the speaker
BulletPoint2 : 【Dimensions】Outer diameter (including Flange): 123mm/4.84", Maximum inner diameter:103mm/4.06", Minimum inner diameter:102mm/4.02", Length:114mm/4.49"
BulletPoint3 : 【Speaker Cabinet Vent Diameter】Fit for most brands of PA/DJ Subwoofer Bass Speaker Cabinets Box Vent, Cabinet Cutout: 4"
BulletPoint4 : 【How to Choose Size】Set the cross-sectional area of the Port Tubes as S1, the effective vibration area of the bass horn as S2, and S1=(0.1-0.4) S2 is the optimal. Port Tubes length LV=(1.463 * 107R ^ 2)/(FB2VB) -1.463R, among them: LV is the length of the port tubes, R=the opening radius of the port tubes, all in inches; FB is the tuning frequency, in Hz; VB is the volume of the sound system, measured in cubic inches
BulletPoint5 : 【Package Includes】4" x 4.5" Speaker Port Tubes - 2Pack
Color : black
CompatibleDevices1 : Home Theater
CompatibleDevices2 : Karaoke Machine
CompatibleDevices3 : Laptop
CompatibleDevices4 : Desktop
CompatibleWithVehicleType : Car
ConnectivityTechnology : Coaxial
ControllerType : Button
ControlMethod : touch
CustomerPackageType : FFP
ExternallyAssignedProductIdentifier : 7447930133898
ExternallyAssignedProductIdentifier1 : 0768795962872
ExternallyAssignedProductIdentifier2 : 768795962872
IncludedComponents : 4" x 4.5" Speaker Port Tubes - 2Pack
IndoorOutdoorUsage : indoor
IsWaterproof : FALSE
ItemName : HiQltyla Speaker Cabinet Port Tubes for PA/DJ Speaker Cabinets Subwoofer Bass Reflex Tube Bass Box Vent, 4" Diameter, 4.5" Length - 2Pack
ItemPackageDimensions_Height : 26.289 centimeters
ItemPackageDimensions_Length : 12.0904 centimeters
ItemPackageDimensions_Width : 13.589 centimeters
ItemPackageQuantity : 1
ItemTypeKeyword : port-tubes
Manufacturer : HiQltyla
Material : Acrylonitrile Butadiene Styrene (ABS)
ModelName : SCPT-4"x4.5"
ModelNumber : SCPT-4"x4.5"
MountingType : Wall Mount
NumberOfBoxes : 1
NumberOfCircuits : 2
NumberOfItems : 2
NumberOfPowerLevels : 1
PartNumber : SCPT-4"x4.5"
PowerSourceType : Corded Electric
ProductDescription :
Speaker Cabinet Port Tubes
Model: SCPT-4"x4.5"
Compatible with most brands of PA/DJ Subwoofer Bass Speaker Cabinets Box
Suggest Cabinet Cutout: 4.06"

Condition: New
Color: Black
Material: Plastic
Outer diameter (including Flange): 123mm/4.84"
Maximum inner diameter: 103mm/4.06"
Minimum inner diameter:102mm/4.02"
Length: 114mm/4.49"

How to choose the speaker cabinet port tubes at suitable size?
1.Set the cross-sectional area of the Port Tubes as S1, the effective vibration area of the bass horn as S2, and S1=(0.1-0.4) S2 is the optimal. according to the calculation formula, the cross-sectional area of 4" Port Tubes fit for 6.5", 8", 10" and 12" Bass Speaker
2.Port Tubes length LV=(1.463 * 107R ^ 2)/(FB2VB) -1.463R, among them: LV is the length of the port tubes, R=the opening radius of the port tubes, all in inches; FB is the tuning frequency, in Hz; VB is the volume of the sound system, measured in cubic inches

Note: The dimensions of these Port Tubes are all manually measured, which may result in some slight errors. Please measure and confirm again after receiving the goods to ensure that the speaker cabinet cutout is just right. If the cutout is too large, you can use some glue to fix it

Package Includes:
4" x 4.5" Speaker Port Tubes - 2Pack
ProductSiteLaunchDate : 2023-10-27T07:00:00.000Z
RecommendedUsesForProduct : For Surround Sound Systems
Size : 4"x4.5"
SpeakerAmplificationType : Passive
SpeakerSize : 4 inches
SpeakersMaximumOutputPower : 10 watts
SpeakerType : Subwoofer
SpecificUsesForProduct : Surround Sound Systems
Style : Fine
SupplierDeclaredDgHzRegulation : not_applicable
SupplierDeclaredHasProductIdentifierExemption : 1
SupportedSoftware : Ableton Live
SurroundSoundChannelConfiguration : 2.0
TargetGender : unisex
UnitCount : 2
UnspscCode : 52161600
WarrantyDescription : 1 year manufacturer
WarrantyType : full warranty
WaterResistanceLevel : not_water_resistant