18" Auto Subwoofers

Buyer's Information About 18-Inch Car Subwoofers

An essential piece of any qualityautomobile sound system is the subwoofer. Usually placed in the trunk, an 18 inch subwoofer is either housed in a cabinet with other speakers or in its own standalone cabinet. eBay has a variety of different subwoofer speakers available with their own specs to help you finish your car audio system.

There are multiple 18-inch subwoofer brands available for sale on eBay

Part of choosing the right affordable subwoofer is selecting which brand of 18-inch subwoofer speaker to buy. Different brands have different standards when it comes to sound quality and different designs. Many people like to purchase subwoofers that match the rest of the speakers in their system, but you may be interested in a separate brand. While shopping on eBay, you are likely to see the following speaker brands for 18-inch car subwoofer speakers. Some also manufacture 10 inch subwoofers.

  • Kicker
  • American Bass
  • Skar Audio
  • Sundown Audio

Is a subwoofer for a car powered or unpowered?

Typically, speakers are either powered or unpowered when it comes to subwoofers. A powered speaker has a built-in amplifier, meaning it merely needs to be attached to a power source and the receiver in order to broadcast a signal.

An unpowered 18-inch subwoofer for sale needs to have a separateamplifier to power the signal. Powered speakers give your car audio system a more streamlined design, while an unpowered car subwoofer may come with a budget-friendly price tag and allow you to use a single power source to power all the speakers in the signal chain. You can set it up with a switch to turn off the subwoofer or put it in subwoofer auto mode to preserve the car's battery. In auto mode, the subwoofer will only power on when you are using your sound system.

What options are available when it comes to ohms?

Ohms are used as a rating system for the power impedance in the speaker. It determines how much power the speaker will draw off of the amp while it is working. As the ohms decrease, higher-power subwoofers can be connected without excessive battery drain because they have lower impedance. Speakers made with the following ohms are available on eBay.

  • 1 ohm
  • 4 ohm
  • 8 ohm
  • 20 ohm

Do they come enclosed and unenclosed?

Yes. New and used 18-in subwoofer speakers come both in enclosed and unenclosed formats. Enclosed speakers are in a frame and are ready to be installed in the car, usually just by mounting them and plugging them in. Unenclosed speakers present the advantage of being able to be installed into an already existing sound system, making them a valuable replacement speaker.

FAQs for 18-Inch Car Subwoofers

Do I need a specific amplifier for an 18-inch car subwoofer?

Yes, you will need an amplifier that can properly power the 18-inch subwoofer. Make sure to choose an amplifier with an output that matches the power handling capabilities of the subwoofer to prevent damage and achieve optimal performance.

Will an 18-inch car subwoofer fit in my vehicle?

The fit of an 18-inch car subwoofer depends on the available space in your vehicle's trunk or enclosure. Measure the available space carefully to ensure that the subwoofer, along with the enclosure if applicable, will fit without obstructing other components or compromising passenger comfort.

What type of enclosure is best for an 18-inch car subwoofer?

The type of enclosure you choose will depend on your listening preferences and available space. Common enclosure types for 18-inch car subwoofers include sealed enclosures for tight and accurate bass response, ported enclosures for increased volume and efficiency, and bandpass enclosures for maximum output within a specific frequency range.

How do I wire an 18-inch car subwoofer?

Wiring an 18-inch car subwoofer involves connecting it to the amplifier using the appropriate gauge speaker wire and ensuring proper polarity. Follow the wiring diagram provided by the subwoofer manufacturer and make sure to securely connect the positive and negative terminals to the corresponding terminals on the amplifier.

What factors should I consider when choosing an 18-inch car subwoofer?

When selecting an 18-inch car subwoofer, consider factors such as power handling, impedance, sensitivity, enclosure type compatibility, and budget. Choose a subwoofer that matches your desired audio performance and complements the rest of your car audio system for a balanced sound experience.





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