Garage
Shop
Account Icon
Account
Box Icon
Track
order
Telephone Icon
Call
Help Icon
Help
Door with Arrow Icon
Sign In
  1. Home
  2. Cadence Store
  3. Discontinued Cadence Car Audio & Electronics
  4. Discontinued Cadence Car Subwoofers
  5. Discontinued Cadence 8" Car Subwoofers

Discontinued Cadence 8" Car Subwoofers

Filters
Cadence ✕
Clear Filters
Reset Done
Product Type
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.

Minimum Sealed Box Volume
This value indicates the minimum sealed box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
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.

Shop the Category

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

Cadence S1W8D2.v2

500W 8" S1 Series Dual 2 ohm Car Subwoofer

S1W8D2.v2 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

Cadence S1W8D2.v2

500W 8" S1 Series Dual 2 ohm Car Subwoofer

• 250W RMS
• 500W Max
• Pressed Paper Pulp Cone
• Double Laminated Foam Surround
• Expanded and Rolled Steel Basket
• Magnet Motor Heatsink with Heat Pump Cooling Technology
• Black Aluminum 4 Layer Voice Coil

1

• 250W RMS
• 500W Max
• Pressed Paper Pulp Cone
• Double Laminated Foam Surround
• Expanded and Rolled Steel Basket
• Magnet Motor Heatsink with Heat Pump Cooling Technology
• Black Aluminum 4 Layer Voice Coil

Cadence S1W8D4.v2

500W Peak (250W RMS) 8" S1 Series Dual 4 ohm Car Subwoofer

S1W8D4.v2 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

Cadence S1W8D4.v2

500W Peak (250W RMS) 8" S1 Series Dual 4 ohm Car Subwoofer

• 250W RMS
• 500W Max
• Pressed Paper Pulp Cone
• Double Laminated Foam Surround
• Expanded and Rolled Steel Basket
• Magnet Motor Heatsink with Heat Pump Cooling Technology
• Black Aluminum 4 Layer Voice Coil

1

• 250W RMS
• 500W Max
• Pressed Paper Pulp Cone
• Double Laminated Foam Surround
• Expanded and Rolled Steel Basket
• Magnet Motor Heatsink with Heat Pump Cooling Technology
• Black Aluminum 4 Layer Voice Coil

Cadence UD8D4

500W Max (250W RMS) Dual 4 Ohm Ultra Drive Series 8" Subwoofer

UD8D4 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

Cadence UD8D4

500W Max (250W RMS) Dual 4 Ohm Ultra Drive Series 8" Subwoofer

• 500 Watts Max
• 250 Watts RMS
• Pressed Paper Cone
• Butyl Rubber Surround
• Linear Codex Spider
• Cast Aluminum Magnet

• 500 Watts Max
• 250 Watts RMS
• Pressed Paper Cone
• Butyl Rubber Surround
• Linear Codex Spider
• Cast Aluminum Magnet

Cadence QSA-PR8

360W Max Single 8" Sealed Under-Seat Subwoofer Enclosure w/ Built-In Amplifier

QSA-PR8 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

Cadence QSA-PR8

360W Max Single 8" Sealed Under-Seat Subwoofer Enclosure w/ Built-In Amplifier

• 360W Single 8" Sealed Subwoofer Enclosure with Built-In Amplifier
• 8" Subwoofer
• Built-In 360W Class D Series Amplifier
• Sealed Under Seat Enclosure
• Enclosure Dimensions: 11.4" D x 9.6" W x 2.75" H

• 360W Single 8" Sealed Subwoofer Enclosure with Built-In Amplifier
• 8" Subwoofer
• Built-In 360W Class D Series Amplifier
• Sealed Under Seat Enclosure
• Enclosure Dimensions: 11.4" D x 9.6" W x 2.75" H

Cadence S2W8D4.V2

1000W 8" S2.V2 Series Dual 4-ohm Car Subwoofer

S2W8D4.V2 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

Cadence S2W8D4.V2

1000W 8" S2.V2 Series Dual 4-ohm Car Subwoofer

• Peak Power: 1000W
• RMS Power: 500W
• Kevlar Reinforced Paper Composite Cone
• Santoprene Rubber Surround

3

• Peak Power: 1000W
• RMS Power: 500W
• Kevlar Reinforced Paper Composite Cone
• Santoprene Rubber Surround

Cadence S2W8D2.V2

1000W 8" S2.V2 Series Dual 2-ohm Car Subwoofer

S2W8D2.V2 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

Cadence S2W8D2.V2

1000W 8" S2.V2 Series Dual 2-ohm Car Subwoofer

• Peak Power: 1000W
• RMS Power: 500W
• Kevlar Reinforced Paper Composite Cone
• Santoprene Rubber Surround

1

• Peak Power: 1000W
• RMS Power: 500W
• Kevlar Reinforced Paper Composite Cone
• Santoprene Rubber Surround

 
    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 Lexus ES350

    2004 Hummer H2

    2016 Honda HR-V

    2014 Ford Expedition

    1984 Buick Skyhawk

    2002 GMC Envoy XL

    2011 Nissan Cube

    2014 Subaru Outback

    2000 Pontiac Firebird

    1995 Subaru Legacy

    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 ES350
    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