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Four-Connect
6" Clear Vent for Subwoofer Enclosure – 154 mm / 6" Aero Kit
Four-Connect
8" Pink and Black Airport Event for Bass Box - 191 mm Event Kit
Discover our Bass Reflex ports, Aeroports and terminal blocks for building or upgrading your Car Audio subwoofer enclosure: 3", 4", 6" and 8" ports, flared ports and connection terminals.
The enclosure port and the connection terminal block are among the important elements when building a subwoofer enclosure. The former is used to tune the acoustics of a Bass Reflex enclosure, while the latter allows you to neatly connect the subwoofer to the amplifier.
Two families of accessories designed for building and finishing your Car Audio enclosure.
The port allows the back volume of the subwoofer to communicate with the outside of the enclosure. Its diameter, length and enclosure geometry directly contribute to the tuning frequency of the Bass Reflex system.
The terminal block allows you to create a neat connection between the subwoofer's internal wiring and the cable coming from the amplifier, without having to run the cables directly through the enclosure wall.
Aeroports use flared ends designed to promote a more gradual airflow at the port's inlets and outlets. They are particularly used in Car Audio subwoofer enclosures and high-power applications.
Sound Auto Concept offers several dimensions of Four-Connect Aeroports to meet different enclosure and subwoofer projects.
A port must be sized according to the net volume of the enclosure, the desired tuning frequency, the subwoofer, its operating power, and the air velocity in the port. The required length also changes when the diameter or tuning frequency is modified.
Two enclosures using the same subwoofer may require completely different ports depending on their volume, tuning and power. For a custom build, the port calculation must be performed using the actual project parameters.
The terminal block is installed directly on an enclosure wall and allows you to easily connect the speaker cable coming from the amplifier.
A simple configuration can be used to connect the positive and negative of the enclosure's internal wiring to the amplifier.
Some configurations require more connections, particularly to facilitate different coil wiring or multiple subwoofers.
To size the port correctly, you must consider the entire project and not just the subwoofer diameter.
Are you building your own enclosure? To determine the right port, start with the parameters of the subwoofer, the available net volume and the desired tuning frequency.
Discover Four-Connect Aeroports in several diameters and finishes, as well as Ground Zero terminal blocks to create clean subwoofer enclosures tailored to your installation.
In a Bass Reflex enclosure, the port is part of the acoustic system and contributes, along with the enclosure volume, to defining its tuning frequency.
An Aeroport generally has flared ends allowing a more gradual transition of air at the port's inlet and outlet.
There is no universal diameter based on the subwoofer size. The choice depends notably on the enclosure volume, power, tuning and the acceptable air velocity in the port.
It depends mainly on the net enclosure volume, the port cross-section and the desired tuning frequency. Changing any of these parameters changes the required length.
It allows you to neatly connect the subwoofer's internal wiring to the speaker cable coming from the amplifier.
It is possible in some projects, but the diameter must be validated according to the airflow, power, volume and enclosure tuning.
Excessive air velocity in an undersized port can promote airflow noise and limit the performance of the system.
No. A sealed enclosure is designed without a port. The ports presented here are intended for designs requiring a port, particularly Bass Reflex enclosures.
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