Car Subwoofer Enclosures

Car subwoofer enclosures are a common fixture within the realm of vehicle audio-equipment enhancements. When the sub box was first released outside of vehicles, it initially served as an aesthetic component. As subwoofers adapted and were able to be integrated into cars, so too the functionality of boxes changed.

What is a subwoofer box for?

While the bass tones your car audio system emits comes from the subwoofer, that is not the only factor in determining a quality sound experience. A subwoofer box is a cabinet type of encasement that holds a subwoofer speaker. The purpose of a sub box is to increase the efficacy and quality of the bass auditory sounds. The box works to cancel lower frequencies from reverberating from the back of the speaker and creating hollow, off-pitch tones.

How do subwoofer boxes work?

At a structural level, enclosures are made of materials intended to absorb lower, vibrating frequencies that arent related to the audio being played. These secondary sounds are considered white noise and affect the integrity of an auditory experience.

An enclosure also helps to direct sounds waves in a particular way to ultimately yield seamless car audio. An internal diaphragm filters sound by vibrating and directing sound waves. The end result is that of deep bass tones that are uncluttered by uncured tenors.

What are subwoofer enclosures made of?

Enclosures usually start with a dense type of wood that makes up the walls of the sub box. The goal is to have an enclosure that is rigid, heavy, and as un-porous as possible. If there are multiple speakers, each one is separated from the other by a partition made of the same wooden material.

From there, some subwoofer enclosures are lined with any variety of acoustic material. This can range from polyfil to foam to densely laden cloth. Many boxes dont have any acoustic material aside from wood though. Each sub box is also typically covered in a thick, carpet-like fabric.

What are vented (ported), sealed, or bandpass subwoofer enclosures?

Vented or ported enclosures have a vent that is integrated to the side of the speaker. The port allows for a bigger sound output which is a great setup for low or deep bass tonality. They are usually larger in size in order to provide the space needed for the vent.

Sealed boxes are air-tight enclosures with no extra venting. These units have a tight bass sound with exacting lengths of beats within a measure.

A bandpass subwoofer enclosure is essentially a hybrid of a sealed and vented enclosure. A single speaker is mounted on the inside of a box that has dual chambers. One chamber is sealed and this is where the speaker is mounted. The second chamber is essentially on top of the first one. This is where the port is placed opposite the internal speaker. This setup produces extremely loud auditory sessions.