How to Buy Wireless Subwoofers

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How to Buy Wireless Subwoofers

Nothing brings the bass tones of an audio track to life like the power of a subwoofer. Designed to handle the low end in an audio system, subwoofers are purchased as part of a home theatre system or as a standalone item. As any buyer of home audio components knows, adding new pieces can create complex wiring systems that affect the appearance and comfort of a room. Fortunately, several quality wireless subwoofers are available on the market. Buyers should choose products that are compatible with a system by checking power ratings and crossovers. There are also several design choices to consider while shopping. Wireless subwoofers are available in department shops, electronics retailers, and online sellers like those on eBay. Consider all options to find the best deals on audio equipment such as wireless subwoofers. 

Match the Subwoofer with a Receiver or Amplifier

A wireless subwoofer must be incorporated into a home entertainment system to function properly. This is accomplished through a wireless receiver that plugs into the amplifier or receiver and transmits a wireless signal to the subwoofer. Before committing to a purchase, buyers should ensure the transmitter for the wireless subwoofer is compatible with an existing receiver. Determine which cables are used, and ensure the receiver has appropriate ports for them.

Passive vs. Powered

There are two types of wireless amplifiers on the market: passive and powered. Passive subwoofers do not have an internal amplifier and rely on an external component for their power. In wired units, this is the receiver or amplifier itself. In wireless subwoofers, a small battery-powered amplifier is normally used.

Powered subwoofers, on the other hand, have an in-built amplifier. In this case, the subwoofer requires an AC power supply. Powered amplifiers allow a receiver to dedicate its power to other speakers in a surround sound system, which can improve the audio quality of the entire system.

Powered wireless subwoofers are the most common type of subwoofer on the market. They tend to be more reliable than passive units, as they have a steady power supply. This means they can be used for long periods of time without the need for owners to recharge or replace any battery units. As a result, powered subwoofers are ideal choice for buyers.


Power is one of the most important considerations when shopping for a wireless subwoofer. There are two primary factors involved with the power of an amplifier: watts and the amount of continuous power the subwoofer produces. Consumers should learn more about each aspect to find a suitable subwoofer.


Watts are the basic measure of a subwoofer's power. Higher watt ratings provide greater volume and better sound performance. The watt rating for a subwoofer refers to the amount of power a unit can receive, while the watt rating on an amplifier indicates how much power it produces. Consumers should match amp and subwoofer watt ratings to ensure proper performance.


The RMS rating on a speaker or subwoofer refers to the amount of average power the speaker is capable of handling over an extended period of time. Like watts, higher RMS ratings represent cleaner and louder audio. Although high RMS is desirable, it is important for buyers to match this rating to their amplifier. A receiver or amp with a higher RMS rating than the subwoofer can cause distortion and eventually overheating in the speaker.

Bear in mind that RMS is related to Ohms, so it is also necessary to compare the Ohm rating for both the amplifier and the subwoofer. Most products are rated at either 6 or 8 Ohms. Look for subwoofers rated for the same RMS and Ohms as the amp used for the best results.

RMS vs. Peak Power

Some manufacturers use a subwoofer's peak power rating to advertise the item. However, this is not an accurate representation of the subwoofer's performance. A subwoofer only needs to reach a power level for a moment in order for it to be listed on the packaging as peak power. Even if the subwoofer only sustained the level for two or three seconds, brands can list this rating on their product. Buyers should ignore peak power ratings and focus on the RMS to find the most accurate representation of a subwoofer's performance. 

Room Size

Buyers should also consider the size of the room a subwoofer will be placed in. Small rooms do not need a large subwoofer, though larger areas, such as open air living rooms, require more powerful sound systems to be effective. Some manufacturers include information with their products on the ideal size of the room a subwoofer should be used in. Look for this to determine if the unit is suitable for its intended space.

Down-firing vs. Front-firing

Subwoofers are designed to project their audio either downward at the floor or from the front into a room. Although some front-firing units can perform better in smaller rooms, the difference between the two types is usually negligible. Instead, it is more important to focus on the sound quality of the individual unit.


A crossover separates frequencies and directs them to the appropriate speaker components in a multi-speaker setup. Subwoofers can be designed with a built-in crossover, though several products on the market do not have one. In general, a built-in crossover is not needed for systems that use the amplifier or receiver's crossover. It is only necessary for buyers to pick subwoofers with a crossover if the receiver or amp used does not have one.  

Sound Bars

Many wireless subwoofers come with a sound bar. These are elongated cases that house multiple speakers. Sound bars can be designed as stereo units or as systems that approximate the effect of surround sound. Like subwoofers, the sound bar may be powered or passive. Combination packages usually pair powered subwoofers with powered sound bars, and vice versa. The combination of a wireless subwoofer with a sound bar is an affordable way to obtain a full audio experience with a minimal number of components and wires, making it an excellent way to improve upon the built-in speakers of an HDTV.

How to Buy Wireless Subwoofers on eBay

A wide selection of wireless subwoofers is available from the sellers on eBay. The easiest way to find these items is to type keywords into the search field on the home page. For example, enter "wireless subwoofer" to see all items tagged with those terms. You may refine listings by adding new terms or by clicking on the category links in search results pages. eBay regularly has great deals on electronics, including subwoofers. You can compare these listings for the best  prices on products.

You can take the time to review item listings and sellers on the site before committing to a purchase. Also, you should be clear on the full price of the subwoofer along with any applicable delivery charges. If you look for sellers with a high positive feedback rating, and many completed transactions, you can feel confident in your purchase. You can also view comments and ratings on specific parts of sellers' performances by clicking on their names in item listings.  


Wireless subwoofers can be an excellent addition to home audio systems, as they allow buyers to set the unit far from the receiver or amplifier. Wireless subwoofer's are given their signal from a transmitter that plugs into the receiver unit. They can be either passive or powered, though buyers should look for powered units that can be plugged directly into a wall outlet. Consider the power ratings of the unit, as well. Watts measure basic power levels, while RMS is the measure of the constant power the subwoofer can receive. Both should be matched to the receiver being used.

Marketplaces like eBay have a broad selection of items from private and commercial sellers, making them an ideal place to compare products and prices. Shop around to find the best wireless subwoofer for the needs of the buyer.

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