Car subwoofers

A car subwoofer is a speaker designed to reproduce low-frequency acoustic waves. It increases the sound quality, enhancing its depth and making it dimensional.

Types of subwoofers

By operating principle:

• Passive (or standard). They consist of an enclosure and a loudspeaker. These appliances require an amplifier that adjusts the frequency range. These devices can sound deeper, however require for manual adjustment of the audio system.
• Active (or powered). Have a built-in low-frequency amplifier. Provide for volume, crossover frequency, and bass level control. Equipped with line inputs and outputs. Easy to install. However, due to their large dimensions, it might be impossible to install them in some parts of a car. More expensive than passive ones, but provide a cheaper solution as a whole, since they do not require the installation of any additional components.

By design:

• Component. Designed to be built into elements of the car interior trim. Difficult to mount. Sound quality is affected by the materials surrounding the device. Besides, additional filters are needed to produce clear low-frequency sound.
• Enclosed. Subwoofer enclosures can be divided into ported (bass reflex), bandpass, and sealed ones.

Bass reflex enclosures have a special port that increases the sound pressure created by the speaker. Such a design helps to prevent dips in the response curve in the 50 to 200 Hz range. Any distortions are absent.

Devices with a sealed enclosure are capable of absorbing backwaves. They feature a simple design and are properly protected against mechanical damage. Characterised by a low efficiency factor.

Bandpass boxes consist of two chambers: sealed and ported. Characterised by a high efficiency factor. Robust. They can be placed anywhere in the cabin as sound is only delivered through the port located in their front side.

Operating instructions for car subwoofers

• At the beginning of use, the device needs breaking-in i.e. warming-up of its surround and spider during a certain period. This will increase the flexibility of these components and, as a result, the speaker performance will be improved. During this period, which can range from 40 to 100 hours and is usually indicated in the user manual, listen to music at a moderate volume.
• If it’s freezing outside, do not play music on the highest volume until the cabin warms up.
• To ensure the best sound quality, you should arrange all components of your audio system properly. If your experience is insufficient, you should have the device installed by professionals.

Professional help from Buycarparts.co.uk

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