Garage
Shop
Account Icon
Account
Box Icon
Track
order
Telephone Icon
Call
Help Icon
Help
Door with Arrow Icon
Sign In
  1. Home
  2. Discontinued Car Audio & Electronics
  3. Discontinued Car Subwoofers
  4. Discontinued 18" Car Subwoofers

Discontinued 18" Car Subwoofers

Find the best 18" car subs money can buy with our huge selection from all the top brands. 18-inch is the most popular size because of the amount of bass it generates and the overall bass produced. The top brands for 18" subs are NVX, JL Audio, Kicker, Rockford Fosgate, and Alpine.

Filters
Reset Done
Price Range
RMS Power Handling
The RMS power is the amount of power the speaker requires to operate safely and properly. RMS Power Handling refers to the amount of power a speaker can handle on a continuous basis. We recommend powering your speakers or subwoofer with 80%-120% of its recommended RMS rating. The RMS power handling specification is typically rated per speaker unless otherwise noted.
Peak Power Handling
Peak power handling refers to the amount of power a speaker can handle during a brief musical burst. The RMS power range figure is a much more reliable rating for determining the speaker's power requirements. The Peak power handling specification is typically rated per speaker unless otherwise noted.
Series
Many brands group their products into series or lines of products to help customers know the level of quality (good, better, best for example). You can filter by series and the brand using our guided browsing.
Subwoofer Size
Refers to the diameter of the subwoofer, measured in inches.
Shallow Mount Installation
This means that the subwoofer/speaker is designed to be installed in areas that do not have a lot of space. Shallow mount subwoofers are typically found under a seat or behind the seat in some trucks.

Shallow mount speakers will typically have a mounting depth of 2" or less, while shallow mount subwoofers will typically have a mounting depth of 3" or less.
Top-Mount Depth (Mounting Depth)
The depth when installed on top of the mounting surface. Measured from the bottom of the speaker's magnet to the bottom of the mounting holes on the rim of the speaker.
Voice Coil(s)
Dual voice coil subs have more wiring flexibility than single voice coils subs; however, single voice coil subwoofers provide easier hookup options for wiring multiple subwoofers in parallel or series. You may also run a dual voice coil (DVC) sub in parallel, series, or combination. A quad voice coil has four voice coils and is equal to two dual voice coil subwoofers as far as wiring goes.
Impedance (Per Voice Coil)
The load value (in ohms) that the speakers present to the amplifier per voice coil - the amount of resistance to the current flow. This is a key specification as subs wired in parallel or low impedances can create problems with your amplifier and potentially void all warranties. We encourage you to ask our support department prior to purchase if you do not understand which impedance level will suit your application best.
Subwoofer Design
This is the design of the subwoofer or the opening of the subwoofer enclosure. Each design has it's own benefits, whether it is a square, circle, or oval.

Round/Circle: This is the typical and common subwoofer design. They have a round cone and are a circle in design.

Square: These woofers are able to achieve a greater cone area in a smaller space. Because of the greater surface area, some square subwoofers will be louder than a round subwoofer of the same size.

Sensitivity
An efficiency or sensitivity rating tells you how effectively a speaker converts power into sound. The higher the number, the more efficient the speaker and the louder it will play with the same input power. An efficient speaker helps you maximize your available power. Most sensitivity ratings measure the speaker's output with 1 watt of input, 1 meter from the speaker. Some speakers' sensitivity is measured with 2.83 volts of input, instead of 1 watt.
  Efficiency (1w/1m) is not an accurate indicator of a subwoofer's output capability and should not be used as a comparison to other speakers or subwoofers to determine which one is "louder".
Main Cone Color
This is the color of the speaker's or subwoofer's cone.
Recommended Enclosure Type
This is the recommended type of enclosure that the subwoofer should be installed into. Some subwoofers are specially designed for particular enclosures.

Sealed: These enclosures completely enclose the air inside the box. These boxes produce a tight bass.

Ported/Vented: These enclosures have a slot of air to escape from the box. The result is a sound that has more "boom".

Bandpass: These are a combination of both sealed and ported enclosures. They can be very efficient, but require tuning for the best response.

Xmax (millimeters)
Typically measured in millimeters, the Xmax value is the measure of a speaker cone's maximum excursion in one direction while maintaining a linear behavior.
Deals
Promotions we have offer More Ways to Shop for items that are on clearance, last chance, special offer and sales, Made in America, and more!
Condition

Shop the Category

filter-icon Filters & Sort
You are currently viewing discontinued products.

Deaf Bonce Avatar SVL-1847 D2

7600W Peak (3800W RMS) 18” Volcano Series Dual 2-ohm Car Subwoofer

SVL-1847 D2 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

Deaf Bonce Avatar SVL-1847 D2

7600W Peak (3800W RMS) 18” Volcano Series Dual 2-ohm Car Subwoofer

• Peak Power: 7600 watts
• RMS Power: 3800 watts
• Paper & Fiberglass Cone
• Foam Surround
• Impedance: Dual 2 ohm
• Mount depth: 12.26"
• Sensitivity: 88.50 dB

VIP Star Icon

VIP Product Get $79.99 in rewards to spend later

• Peak Power: 7600 watts
• RMS Power: 3800 watts
• Paper & Fiberglass Cone
• Foam Surround
• Impedance: Dual 2 ohm
• Mount depth: 12.26"
• Sensitivity: 88.50 dB

DC Audio Level 5 18M5D1 (M5LV518D1)

7000W Peak (3500W RMS) 18" Level 5 Series M5 Version Dual 1-Ohm Car Subwoofer

M5LV518D1 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

DC Audio Level 5 18M5D1 (M5LV518D1)

7000W Peak (3500W RMS) 18" Level 5 Series M5 Version Dual 1-Ohm Car Subwoofer

• Peak Power: 7000 watts
• RMS Power: 3500 watts
• Impedance: Dual 1 ohm
• Kraft Pulp cone
• Wide Foam surround
• Mount depth: 12.75"

VIP Star Icon

VIP Product Get $89.50 in rewards to spend later

• Peak Power: 7000 watts
• RMS Power: 3500 watts
• Impedance: Dual 1 ohm
• Kraft Pulp cone
• Wide Foam surround
• Mount depth: 12.75"

Sundown Audio SDDN 18" D1

3500W RMS 18" SDDN Series Dual 1-ohm Limited Edition Competition Car Subwoofer

SW-SDDN18D1 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

Sundown Audio SDDN 18" D1

3500W RMS 18" SDDN Series Dual 1-ohm Limited Edition Competition Car Subwoofer

• Peak RMS Power: 3500 watts
• Impedance: Dual 1 ohm
• Mega V2 Cone
• Mount depth: 15.12"
• Sensitivity: 89.43 dB

VIP Star Icon

VIP Product Get $140.00 in rewards to spend later

• Peak RMS Power: 3500 watts
• Impedance: Dual 1 ohm
• Mega V2 Cone
• Mount depth: 15.12"
• Sensitivity: 89.43 dB

Sundown Audio Z-18 v.7 D1 18" (Z18V7D1) (Open Box, Great)

7000W Peak (3500W RMS) 18" Z Series V7 Dual 1-ohm Car Subwoofer (SW-ZV718D1)

ZV718D1 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

Sundown Audio Z-18 v.7 D1 18" (Z18V7D1) (Open Box, Great)

7000W Peak (3500W RMS) 18" Z Series V7 Dual 1-ohm Car Subwoofer (SW-ZV718D1)

• Peak Power: 7000 watts
• RMS Power: 3500 watts
• Impedance: Dual 1 ohm
• Treated Paper Cone
• Treated Foam Surround
• Sensitivity: 92.111 dB

• Peak Power: 7000 watts
• RMS Power: 3500 watts
• Impedance: Dual 1 ohm
• Treated Paper Cone
• Treated Foam Surround
• Sensitivity: 92.111 dB

Deaf Bonce Avatar SVL-1847 D1

7600W Peak (3800W RMS) 18” Volcano Series Dual 1-ohm Car Subwoofer

SVL-1847 D1 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

Deaf Bonce Avatar SVL-1847 D1

7600W Peak (3800W RMS) 18” Volcano Series Dual 1-ohm Car Subwoofer

• Peak Power: 7600 watts
• RMS Power: 3800 watts
• Paper & Fiberglass Cone
• Foam Surround
• Impedance: Dual 1 ohm
• Mount depth: 12.26"
• Sensitivity: 88.50 dB

VIP Star Icon

VIP Product Get $79.99 in rewards to spend later

• Peak Power: 7600 watts
• RMS Power: 3800 watts
• Paper & Fiberglass Cone
• Foam Surround
• Impedance: Dual 1 ohm
• Mount depth: 12.26"
• Sensitivity: 88.50 dB

Sundown Audio M-18 D1 18" (M18D1) (Open Box, Great)

4000W Peak (2000W RMS) 18" M Series Dual 1-ohm Car Subwoofer (SW-M18D1)

SW-M18D1 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

Sundown Audio M-18 D1 18" (M18D1) (Open Box, Great)

4000W Peak (2000W RMS) 18" M Series Dual 1-ohm Car Subwoofer (SW-M18D1)

• Peak Power: 4000 watts
• RMS Power: 2000 watts
• Impedance: Dual 1 ohm
• Polypropylene Cone
• High Roll Foam Surround
• Mount depth: 14.05"
• Sensitivity: 85.83 dB

• Peak Power: 4000 watts
• RMS Power: 2000 watts
• Impedance: Dual 1 ohm
• Polypropylene Cone
• High Roll Foam Surround
• Mount depth: 14.05"
• Sensitivity: 85.83 dB

JBL 18SWT5600

5600W Peak (2800W RMS) 18" Tornado Series Single 4-ohm Car Subwoofer

18SWT5600 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

JBL 18SWT5600

5600W Peak (2800W RMS) 18" Tornado Series Single 4-ohm Car Subwoofer

• Peak Power: 5600 watts
• RMS Power: 2800 watts
• Cellulose Cone
• Rubber Surround
• Impedance: Single 4 ohm
• Sensitivity: 94 dB

VIP Star Icon

VIP Product Get $35.00 in rewards to spend later

2

• Peak Power: 5600 watts
• RMS Power: 2800 watts
• Cellulose Cone
• Rubber Surround
• Impedance: Single 4 ohm
• Sensitivity: 94 dB

Massive Audio BOA181NV2

12000W Peak (6000W RMS) 18" Boa Series Dual 1-ohm Car Subwoofer

BOA181NV2 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

Massive Audio BOA181NV2

12000W Peak (6000W RMS) 18" Boa Series Dual 1-ohm Car Subwoofer

• Peak Power: 12000 watts
• RMS Power: 6000 watts
• Impedance: Dual 1 ohm
• Non-Pressed Paper cone
• Foam surround
• Sensitivity: 92.7 dB

• Peak Power: 12000 watts
• RMS Power: 6000 watts
• Impedance: Dual 1 ohm
• Non-Pressed Paper cone
• Foam surround
• Sensitivity: 92.7 dB

American Bass Godzilla 18" (GODZILLA-1811)

12000W Peak (4700W RMS) 18" Godzilla Series Dual 1-ohm Subwoofer

GODZILLA-1811 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

American Bass Godzilla 18" (GODZILLA-1811)

12000W Peak (4700W RMS) 18" Godzilla Series Dual 1-ohm Subwoofer

• Peak Power: 12000 watts
• RMS Power: 4700 watts
• Impedance: Dual 1 ohm
• Carbon Fiber Cone
• High Roll Foam Surround
• Mount depth: 12.13"
• Sensitivity: 86.2 dB

VIP Star Icon

VIP Product Get $106.85 in rewards to spend later

• Peak Power: 12000 watts
• RMS Power: 4700 watts
• Impedance: Dual 1 ohm
• Carbon Fiber Cone
• High Roll Foam Surround
• Mount depth: 12.13"
• Sensitivity: 86.2 dB

American Bass Godzilla 18" (GODZILLA-1822)

12000W Peak (4700 RMS) 18" Godzilla Series Dual 2-ohm Subwoofer

GODZILLA-1822 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

American Bass Godzilla 18" (GODZILLA-1822)

12000W Peak (4700 RMS) 18" Godzilla Series Dual 2-ohm Subwoofer

• Peak Power: 12000 watts
• RMS Power: 4700 watts
• Impedance: Dual 2 ohm
• Carbon Fiber Cone
• High Roll Foam Surround
• Mount depth: 12.13"
• Sensitivity: 87.3 dB

VIP Star Icon

VIP Product Get $106.85 in rewards to spend later

• Peak Power: 12000 watts
• RMS Power: 4700 watts
• Impedance: Dual 2 ohm
• Carbon Fiber Cone
• High Roll Foam Surround
• Mount depth: 12.13"
• Sensitivity: 87.3 dB

DC Audio Level 6 18M5D2 (M5LV618D2)

9000W Peak (4500W RMS) 18" Level 6 Series M5 Version Dual 2-ohm Car Subwoofer

M5LV618D2 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

DC Audio Level 6 18M5D2 (M5LV618D2)

9000W Peak (4500W RMS) 18" Level 6 Series M5 Version Dual 2-ohm Car Subwoofer

• Peak Power: 9000 watts
• RMS Power: 4500 watts
• Impedance: Dual 2 ohm
• Kraft Pulp cone
• Wide Foam surround
• Mount depth: 13"
• Sensitivity: 86.16 dB

VIP Star Icon

VIP Product Get $123.00 in rewards to spend later

• Peak Power: 9000 watts
• RMS Power: 4500 watts
• Impedance: Dual 2 ohm
• Kraft Pulp cone
• Wide Foam surround
• Mount depth: 13"
• Sensitivity: 86.16 dB

Sundown Audio NS6 V.6 18" D2 (Open Box, Like New)

3000W RMS 18" Nightshade NS Series Dual 2-ohm Car Subwoofer

SW-NSV618D2 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

Sundown Audio NS6 V.6 18" D2 (Open Box, Like New)

3000W RMS 18" Nightshade NS Series Dual 2-ohm Car Subwoofer

• RMS Power: 3000 watts
• Impedance: Dual 2 ohm
• Mega Roll V2 Surround
• Mount depth: 16.3"
• Sensitivity: 87.58 dB

• RMS Power: 3000 watts
• Impedance: Dual 2 ohm
• Mega Roll V2 Surround
• Mount depth: 16.3"
• Sensitivity: 87.58 dB

Sundown Audio NS6 V.6 18" D2 (Open Box, Great)

3000W RMS 18" Nightshade NS Series Dual 2-ohm Car Subwoofer

SW-NSV618D2 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

Sundown Audio NS6 V.6 18" D2 (Open Box, Great)

3000W RMS 18" Nightshade NS Series Dual 2-ohm Car Subwoofer

• RMS Power: 3000 watts
• Impedance: Dual 2 ohm
• Mega Roll V2 Surround
• Mount depth: 16.3"
• Sensitivity: 87.58 dB

• RMS Power: 3000 watts
• Impedance: Dual 2 ohm
• Mega Roll V2 Surround
• Mount depth: 16.3"
• Sensitivity: 87.58 dB

Sundown Audio X V.3 18" D1 (Open Box, Like New)

2000W RMS 18" X Series Dual 1-ohm Car Subwoofer

SW-XV318D1 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

Sundown Audio X V.3 18" D1 (Open Box, Like New)

2000W RMS 18" X Series Dual 1-ohm Car Subwoofer

• RMS Power: 2000 watts
• Impedance: Dual 1 ohm
• Mount depth: 13.6"
• Sensitivity: 88.6 dB

• RMS Power: 2000 watts
• Impedance: Dual 1 ohm
• Mount depth: 13.6"
• Sensitivity: 88.6 dB

Sundown Audio NS6 V.6 18" D1 (Open Box, Great)

3000W RMS 18" Nightshade NS Series Dual 1-ohm Car Subwoofer

SW-NSV618D1 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

Sundown Audio NS6 V.6 18" D1 (Open Box, Great)

3000W RMS 18" Nightshade NS Series Dual 1-ohm Car Subwoofer

• RMS Power: 3000 watts
• Impedance: Dual 1 ohm
• Mega Roll V2 Surround
• Mount depth: 16.3"
• Sensitivity: 87.47 dB

• RMS Power: 3000 watts
• Impedance: Dual 1 ohm
• Mega Roll V2 Surround
• Mount depth: 16.3"
• Sensitivity: 87.47 dB

Sundown Audio X V.3 18" D2 (Open Box, Like New)

2000W RMS 18" X Series Dual 2-ohm Car Subwoofer

SW-XV318D2 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

Sundown Audio X V.3 18" D2 (Open Box, Like New)

2000W RMS 18" X Series Dual 2-ohm Car Subwoofer

• RMS Power: 2000 watts
• Impedance: Triple 2 ohm
• Mount depth: 13.6"
• Sensitivity: 87.6 dB

• RMS Power: 2000 watts
• Impedance: Triple 2 ohm
• Mount depth: 13.6"
• Sensitivity: 87.6 dB

Sundown Audio NS6 V.6 18" D1 (Open Box, Like New)

3000W RMS 18" Nightshade NS Series Dual 1-ohm Car Subwoofer

SW-NSV618D1 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

Sundown Audio NS6 V.6 18" D1 (Open Box, Like New)

3000W RMS 18" Nightshade NS Series Dual 1-ohm Car Subwoofer

• RMS Power: 3000 watts
• Impedance: 1 ohm
• Mega Roll V2 Surround
• Mount depth: 16.3"
• Sensitivity: 87.47 dB

• RMS Power: 3000 watts
• Impedance: 1 ohm
• Mega Roll V2 Surround
• Mount depth: 16.3"
• Sensitivity: 87.47 dB

Sundown Audio ZV6 18" D1 (Open Box, Great)

2500W RMS 18" Z Series Dual 1-ohm Car Subwoofer

SW-ZV618D1 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

Sundown Audio ZV6 18" D1 (Open Box, Great)

2500W RMS 18" Z Series Dual 1-ohm Car Subwoofer

• RMS Power: 2500 watts
• Impedance: Dual 1 ohm
• Mega Roll V2 Surround
• Mount depth: 14.92"
• Sensitivity: 87.51 dB

• RMS Power: 2500 watts
• Impedance: Dual 1 ohm
• Mega Roll V2 Surround
• Mount depth: 14.92"
• Sensitivity: 87.51 dB

Sundown Audio ZV6 18" D1 (Open Box, Like New)

2500W RMS 18" Z Series Dual 1-ohm Car Subwoofer

SW-ZV618D1 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

Sundown Audio ZV6 18" D1 (Open Box, Like New)

2500W RMS 18" Z Series Dual 1-ohm Car Subwoofer

• RMS Power: 2500 watts
• Impedance: Dual 1 ohm
• Mega Roll V2 Surround
• Mount depth: 14.92"
• Sensitivity: 87.51 dB

• RMS Power: 2500 watts
• Impedance: Dual 1 ohm
• Mega Roll V2 Surround
• Mount depth: 14.92"
• Sensitivity: 87.51 dB

Sundown Audio ZV6 18" D2 (Open Box, Like New)

2500W RMS 18" Z Series Dual 2-ohm Car Subwoofer

SW-ZV618D2 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

Sundown Audio ZV6 18" D2 (Open Box, Like New)

2500W RMS 18" Z Series Dual 2-ohm Car Subwoofer

• RMS Power: 2500 watts
• Impedance: Dual 2 ohm
• Mega Roll V2 Surround
• Mount depth: 14.92"
• Sensitivity: 87.58 dB

• RMS Power: 2500 watts
• Impedance: Dual 2 ohm
• Mega Roll V2 Surround
• Mount depth: 14.92"
• Sensitivity: 87.58 dB

1 2 Next

Items per page: 20 40 60

    Clear all
    why-shoping-with-sonic

    We love people and we're ready to help you! See what separates us from our competition.

    Take advantage of our VIP rewards like 10% back on your purchases, free 2-day shipping, extended warranties, and free returns! Gain access to all of these rewards without any membership fees.
    Get great discounted (and possibly FREE) installation accessories with most car stereo purchases. This includes dash kits, wiring harnesses and antenna adapters that you will need to properly install your new car stereo.
    We are an Authorized Dealer for all the brands we sell, including the most premium brands in car and marine audio such as Hertz, JL Audio, NVX, Rockford Fosgate, Kicker, Alpine, Kenwood and many more.
    Shop Deals and get up to 30% off premium brands! Shop Now! We are always looking out for the best products and deals to offer our customers. Don’t pay too much by shopping elsewhere!
    We have information on brands, gear, and more for you to explore! Check out our YouTube Channel for helpful how-to videos, product reviews, and Q&As. For a more detailed look, also visit our Learning Center!
    Our trained experts are here to assist you! They are just a phone call or click away to help you get the right gear for you and your vehicle!
    Why Shop With Us?
    Save up to 10 different vehicles in your garage
    Vehicle
    Store     Delete

    2009 Audi R8

    2003 Lexus SC430

    1981 Buick Skylark

    2012 Nissan Frontier

    2000 Ford Focus ZX3

    Add vehicle Clear all vehicles
    Where to find vehicle info
    Are you sure you want to clear your garage?
    This action cannot be undone. Confirm

    Cancel

    This category was not designed for products.
    If you continue, you will be redirected to a category customized for your vehicle. Continue

    Cancel

    Shop your 2009 R8
    Why Use a Vehicle Fit Guide?
    Change vehicle | Shop without vehicle
    Whoa! Slow down. Add your details below!
    additional information required
    Add vehicle details to confirm fitment
    Ignore fitment details
    Find stereos and more that work -- fast.

    Additional information:

    Remove

    Can't find your vehicle? Click here and we'll help.

    Where to find vehicle info

    Go to Fitment

    Didn't find your car?

    Submit your details and we'll help!
    Please enter the letters as they are shown in the image above. Letters are not case-sensitive.
    Identify your vehicle and submodel details
    • Owner's manual
    • Vehicle's insurance card
    • Vehicle registration
    • Vehicle produced after 2005: Inside driver's side door
    • Vehicle produced before 2005: Rear passenger doorjamb, glove box, center console, or engine compartment
    Car Info Side Door Icon
    Vehicle Registration Icon
    Vehicle Insurance Icon
    Back

    Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

    • You see only parts engineered for your exact vehicle
    • You avoid incompatible radios, speakers, or wiring
    • Installation is smoother, faster, and frustration-free
    • You get the correct accessories the first time

    Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.

    Back
    Track your order
    Call our experts
    Support Center
    Return & Exchanges
    Follow on Instagram Instagram logo
    Subscribe on YouTube YouTube logo