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Best 18 Inch Subwoofer (Review & Buyers Guide)

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Do you want to upgrade your car’s sound system? Are you looking for the top-notch 18-inch subwoofers? If yes, we have performed in-depth research to help you find the best product for your necessities.

If you want a speaker that produces the lowest and deepest bass, moves significant amounts of air, and provides a listening experience that will lift your seats, it’s time to consider buying the best 18 Inch subwoofer.

When it comes to depth and peak power, these speakers will not disappoint. They produce a powerful sound level that you can even hear from several blocks away.

With so many best 18 inch subwoofers available on the market, we understand that you may find the selection process a daunting task. Don’t worry; we reviewed the top choices to teach you how to decide which one is best for you. We also prepared a buying guide for a better overall selection.

What to Look for in a 18 Inch Subwoofer 

Before purchasing 18 inch subwoofers, ensure to get familiar with the necessary features. That way, you can ensure that it will fit properly into your car. Here are the things you should look for in the best 18-inch subwoofers:

Peak Power 

The 18-inch subwoofer’s peak power rating determines the maximum performance or loudness. For instance, a 3000-watt subwoofer is more powerful than a 1500-watt one.

Frequency Response 

Having a powerful subwoofer is always a great decision. However, you also need to ensure that it comes with high-detail audio output.

Do not forget to check the frequency response rate because a higher range is equivalent to better audio detail. For example, 20-500 Hz 18-inch subwoofers are more detailed than 40-250 Hz ones.

Form Factor 

The form factor is critical when installing an 18-inch car subwoofer in the home or car audio system. Some 18-inch subwoofers come with enclosures for quick and easy installation, but other subwoofers do not include them. If you have a compact space, you can install a subwoofer with a customized box of your choice.

High Roll Foam Surround

A high roll foam surround is a piece of material that helps the speaker be as loud as it can. It does this by making the sound bounce off itself and back into your car.

Competition Grade Paper Cone

A paper cone is an important part of a subwoofer. It helps to make the sound louder. When you get a powered subwoofer with this feature, it makes low frequencies much simpler to reproduce.

Top 10 Best 18 Inch Subwoofers For Sound Quality

A good subwoofer helps enhance your car’s audio system. Do not worry if it is your first time getting a 18 inch car subwoofer; we have rounded up the best options on the market to encourage you to decide which one suits your demands best.

1. Rockville RVW1800P4 18-Inch 1800W Subwoofer 

Rockville RVW1800P4 1800w Raw DJ Subwoofer

The Rockville RVW1800P4 is one of the most reliable and powerful professional car subwoofers today. It adds a great thump to the audio while delivering a clear, articulate, and deep bass. This low-end sound champ excels at filling the musical spectrum’s bottom.

High levels of longevity, sensitivity, and power handling are expected with the high-quality parts. The enclosure used non-resonant and high-density MDF.

This material lasts longer than others and facilitates outstanding quality sound. This 18-inch car subwoofer utilizes a 107-ounce magnet alongside a 4-inch KSV voice coil, which can handle up to 1800 watts. It comes with a well-balanced frequency response, so it hits deep tones and offers mid-frequencies.

When it comes to portability, this budget friendly subwoofer is a winner. This subwoofer with 18 inches outer diameter is elaborated with ergonomic handles for easier transport. Since it is lighter than other high-end 18-inch subwoofers, moving it from one place to another is not an issue.

2. American Bass Cast Frame 300oz Magnet Subwoofer

American Bass HD18D2 HD 18 Inch 4000w Competition Car Subwoofer

The American Bass Cast Frame does not only have an affordable price but is also super powerful. It comes with a robust construction and delivers tight, deep, and loud bass. This car subwoofer features a 1500-watt power RMS and 3000-watt max to blast music. It is designed with level controls.

Furthermore, this car subwoofer can handle highs and lows at a fraction of the cost of other professional-grade systems. If it is used to complement a home theater system, it feels like a movie theater. It delivers an impressive sound clarity without breaking the bank.

This feature-rich subwoofer comes with a dual 2-ohm voice coil. Overall, it delivers superior power output than other subwoofers out there. The frequency response complements can complement the car’s entire system seamlessly. Plus, it is reasonably priced and promotes aesthetic, customized audio systems.

3. DS18 Troublemaker SPL 18-Inch Subwoofer 

DS18 Troublemaker SPL Competition Subwoofer 18 Inch

The DS18 Troublemaker is what you need if you are looking for a subwoofer that grabs everybody’s attention. It is one of the strongest of all the SPL Competition Grade Subwoofer units.

It features a 3500-watt RMS power rating and a 6000-watt maximum power output. Plus, this subwoofer is designed with high-strength neodymium magnets for superior sound clarity and a black aluminum single voice coil that guarantees high performance.

This sub delivers extremely powerful sound, thanks to its high output. It can even handle over 100 dB sound pressure. This car subwoofer with 18 inches outer diameter may be new in the market, but it already made a name with its excellent sound quality and more power.

It comes with a unique design and a red-color aluminum basket that adds aesthetics. The dimensions are 19 x 19 x 25 inches, and weighs 80 pounds. It also features a 6-layer spider that promotes long life.

4. Skar Audio ZVX-18v2 D2 18-Inch Car Subwoofer 

Skar Audio ZVX 18v2 D2 18 Inch Sub

The Skar Audio ZVX-18v2 promises a powerful deep bass. It is designed to excel to any bass production and achieve the needs of the auto market, thanks to its 1600-watt RMS power.

Additionally, the parts can effectively enhance every car audio bass system. The bass delivery heavily relies on the competition-grade paper cone, high temperature voice coil, massive triple slug magnet, and high-roll foam surround.

The 18-inch subwoofer’s maximum power can handle up to 3200 watts, making it preferred by many when it comes to mind-blowing bass production. This Skar Audio ZVX subwoofer range can deliver dynamic, crisp low-end frequency seamlessly.

The Skar Audio subwoofer has an outer 18.2 inches diameter and measures 15.2 inches deep, making it suitable for customized box systems. Skar Audio ZVX-18v2 has high-quality mounting hardware. Car audio enthusiasts have the freedom to select the enclosure box they want, so they can easily build a custom audio system.

Another interesting thing about this subwoofer is that it does not heat during long hours of use because of high output power levels. That is because Skar Audio ZVX-18v2 has a reliable cooling mechanism. This feature ensures no overheating issues will interrupt its efficiency.

5. Harmony Audio HA-ML181 Audio System 

Harmony Audio HA ML181 Monolith 18 Inch Sub

The Harmony Audio HA-ML181 has a fantastic power 2 Ohm woofer, which offers a vehicle a crisp distortion-free sound even with space constraints. This subwoofer gives the installers the freedom to mount it anywhere in the car.

It is ideal for customized situations and even delivers great sounds even without the custom box. This 18-inch mounting depth subwoofer features a 20mm HE magnetic gap height, a solid black aluminum coil enabling more ohm diversity.

With the barium ferrite high-temperature voice coils, crisp sounds are produced. The stamped steel basket, so the entire subwoofer proves versatility. It can withstand 3500 watts and delivers a 30-1.8kHz frequency response rate.

Meanwhile, it requires a little wiggle room to produce better sounds. The users may also need to consider a custom box to achieve fantastic volumes when performing in the open air. All in all, this top pick provides a very competitive max wattage and versatility.

6. Sundown Audio X-18-V3 D2 Subwoofer 

Sundown Audio X 18 v3 D2 18 Inch Sub

This X-18-V3 D2 sub has been popular with its modern and sophisticated design that suits every music lover’s aesthetic needs. It is perfect for both portable and installed applications. This 2000-watt powered subwoofer works best when combined with a powerful class D amplifier.

That power level provides an impressive bass production. First-time users would appreciate Sundown X-18-V3 D2 setting it up is easy. It features multiple music presets. It also comes with store and recalls settings, system-match crossovers, and input level control and meters.

Each of them allows you to set up your preferred music. You can install this reliable subwoofer in a compact and lightweight wood enclosure. With the unique design, the installation and lifting become easier.

The technology provides an intuitive system configuration. It allows east management of multiple loudspeakers at one time. When overdriven, car enthusiasts will get alerts about the subwoofer’s effectiveness.

7. DC AUDIO Level 4 18-Inch Subwoofer

DC Audio 18 Inch Sub

The DC AUDIO Level 4 offers a state-of-the-art bass performance and low-frequency extension to the car’s audio system. The efficient design and premium-grade components are behind the unit’s top-notch bass performance.

This subwoofer is carefully constructed with Image Wavelength, ensuring uniform coverage and high intelligibility all over the frequency coverage area. All the unit’s design aspects maximize the cabinet’s low volumes and reduce its footprint to promote transportability.

It meets the demanding needs of musicians because of its portability, and ease of use. While it has a especial preset tuned to work with various series speakers, it still works with different PA systems because of the selectable crossover presets.

Car owners can choose from four crossover points. If the subwoofer is used with other PA speakers, 120Hz, 100Hz, and 80Hz options are available. For those who like local products, this sub is hand made U.S.A.

When combined with a compliant interface, this subwoofer delivers convenient sound control. It is recommended to use an interface that supports iOs and Android; that way experts can tweak the presets, master volume, and DPS parameters.

8. B&C 18SW100 18-Inch Subwoofer

BC 18SW100 18 Inch Subwoofer 

The B&C 18SW100 enables you to enjoy delightful bass. It is easy to install at the back or behind the car’s rear seats. It features a molded cone shape that comes with a black injection for rubber suspension assistance. Besides the best sound quality, it also looks great with its unique design and excellent peak power handling.

Moreover, this 18-inch subwoofer reproduces enhanced sound due to the two 100 ounce magnets, rubber magnet boot, and non-fatiguing significant rubber suspension. It features a silver played terminal that helps deliver a distortion-free sound.

The black injected cone assists with rubber suspension.The flat progressive spider design increases the mechanical stability while prolonging the unit’s life. It also ensures clearer sound quality.

The B&C 18SW100 is specially created for bass lovers. It is an excellent choice for feasible efficiency and high-quality music alongside earth-shattering bass. It provides a flexible installation steps on either vehicle or house at a very reasonable price.

9. Resilient Sounds Platinum 18″ Sub

Resilient Sounds Platinum 1822 subwoofer.png

The sub combines powerful performance and affordability. It enables every musician or music lover to access high-performing professional gear. This Platinum model comes with an innovative design alongside premium materials.

The speaker features an 8 layer American made voice coil. The 18-inch subwoofer reproduces a balance bass and the volume controls can be adjusted with a low-pass filter. With the rear panel, the subwoofer delivers ways for varying sound systems. So, it is used in different audio systems.

It is manufactured with amazingly durable rubber feet and heavy-duty metal corners to ensure durability and portability. The included FEA optimized triple stack motor make the setup a lot easier when the subwoofer is elevated.

The unit’s recessed sides provide easy transport. Plus, the recessed placements eliminate challenges when lifting the subwoofer. As a result, tight alignment is maintained when various enclosures are placed side to side.

10. CT Sounds Tropo 18 D4 Car Subwoofer 

CT Sounds TROPO 18 D2 18 Inch Car Subwoofer

The CT Sounds Tropo 18 D4 features a large voice coil to promote superior power performance. The 3-inch coils deliver versatility, and when combined with the high-quality magnet, a powerful sound production and reduced power compression are produced.

More so, the DVC design is coupled with a Y35-grade triple stacked ferrite magnet. It can hold different kinds of performance environments, whether it is used indoors or outdoors. The stupendous and robust arm-styled basket can endure prolonged exposure to moisture, sunlight, heat, and other elements.

The Tropo 18 D4 can also operate high-power audio frequencies at the highest rated results. These car subwoofers use automotive-grade material for edge protection. In other words, the unit’s structure and sensitive components are protected.

The rubber surrounds can sustain a clean, tight bass production and enhance the entire unit’s durability. When it comes to pricing, this subwoofer allows everyone to experience professional SPL at a great price. It is not only high-performance but also money-saving.

Best 18 Inch Subwoofer Buying Guide 

If you have a subwoofer by your side, it means you have a chance for unlimited fun for fantastic, big bass and overall music experience. The entire selection adventure can be stressful, mainly if you are unaware of the considerations.

Remember that not car subwoofers are the same. So, you have to pick the one that especially suits your vehicle’s audio system. After you determine the car subwoofer you want to buy, the next step is to compare the specs.

Specifications Of A 18-Inch Powered Subwoofer

Below are some of the key specs you have to look into:

Power

You will need a subwoofer that delivers power if you want to make your music loud. Some people focus on peak power ratings, but it is recommended to pay attention to RM power ratings because they are more realistic.

These ratings measure non-stop power handling. Plus, you have to determine whether or not a specific unit can manage the power output of your in-built amp.

Frequency Range

While a loud and powerful car subwoofer unit is excellent to have, you cannot enjoy it if it does not provide exceptional audio quality and detail. So, you have to check the frequency response range.

With a higher frequency rate, the subwoofer can provide a more significant amount of frequencies. The frequency response often ranges from 20-500HZ, 40-250Hz, and 18-300Hz.

The lower frequency of 18Hz already produces a great bass output, but the 20-500Hz frequency response range is the best option because it makes the subwoofer highly versatile.

Number of Featured Voice Coils 

If you are a car audio enthusiast who seeks more flexibility when it comes to wiring your sound system, you can go for a dual voice coil (DVC) subwoofer. Most subwoofers come with a single voice coil, but DVC subwoofers are getting more popular.

Subwoofer with dual voice coil styles utilizes two distinct coils. Each voice coil wiring comes with individual connections, connecting to a standard cone, and mounted on one cylinder.

Enclosure Type 

The enclosure types a subwoofer is mounted in have a significant effect on the sound it produces. Generally, if you have a subwoofer with a sealed box, you can achieve the most accurate and deepest sound. Meanwhile, bandpass and ported enclosures deliver more volume.

Sensitivity 

This factor goes hand-in-hand with power in ensuring high output. Having a subwoofer with a high sensitivity rating means less energy when producing a similar sound amount as other 18-inch subs with less sensitivity rating.

Summary 

Regardless of how loudly or softly you like to listen to or what kind of music you love, a high-quality subwoofer helps improve the overall listening experience.

However, you need to consider several factors when getting a subwoofer to ensure you will end up with the best subwoofer for your listening needs and the car’s audio system.

From the ten products we have reviewed, Rockville PBG18 is our top choice for the top 18-inch subwoofer because of its high power handling and low frequencies in a different sound.

It produces well-balanced sound clarity and punch even in tight spaces and has an impressive high temperature voice coil. It can even push you to break all competition records. Plus, the enclosure is built to last, and the RMS power is satisfying at an affordable price.

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