Garage
Shop

Discontinued 5.25" Component Speakers for your 2021 SQ8 close

Exclamation Icon It’s a no-brainer.
Get your speakers here.

Install kit discounts · Guaranteed fit · Full warranty
Loading...
Filters

Your Vehicle


Universal fit Icon
Explore universal-fit speaker products for your 2021 SQ8
Vehicle-specific solutions are not available.

Update vehicle | Remove vehicle | Vehicle store

Shop the Category

filter-icon Filters & Sort
You are currently viewing discontinued products.
Go to item page Right Arrow Icon of Right Arrow

5-1/4" Vega Series 2-Way Component Speaker Kit • 2 5-1/4" Midwoofers • 2 Vega tweeters • Vega Crossover • 150W Peak / 75W RMS power handling

5-1/4" Vega Series 2-Way Component Speaker Kit • 2 5-1/4" Midwoofers • 2 Vega tweeters • Vega Crossover • 150W Peak / 75W RMS power handling

Alpine SPX-13REF

5-1/4" 2-way Type-X Component System

Go to item page Right Arrow Icon of Right Arrow

5-1/4" 2-way Type-X Component System

5.25" Type X Series Component System • 180W Max • 60W RMS • Aluminum cone • (NBR) Nitrile Butadiene Rubber surround • 1" Dome tweeter • Cast aluminum frame • 4-Level tweeter adjustment

No Fit Icon Doesn't fit your SQ8

5.25" Type X Series Component System • 180W Max • 60W RMS • Aluminum cone • (NBR) Nitrile Butadiene Rubber surround • 1" Dome tweeter • Cast aluminum frame • 4-Level tweeter adjustment

MB Quart ESA 213

5-1/4" EXP Series 2-way Component System (ESA213)

Go to item page Right Arrow Icon of Right Arrow

5-1/4" EXP Series 2-way Component System (ESA213)

Power Handling: 35-80 watts • Surface mounting rings and grilles included • Two-piece 0.75" (19mm) tweeters with titanium coated dome in plastic housing • Frequency Response: 58 Hz - 32 kHz

No Fit Icon Doesn't fit your SQ8

Power Handling: 35-80 watts • Surface mounting rings and grilles included • Two-piece 0.75" (19mm) tweeters with titanium coated dome in plastic housing • Frequency Response: 58 Hz - 32 kHz

Polk Audio MOMO MMC5250

5-1/4" 2-way MOMO Series Component System (MMC 5250)

Go to item page Right Arrow Icon of Right Arrow

5-1/4" 2-way MOMO Series Component System (MMC 5250)

5-1/4" 2-Way MOMO Series Component System • 100W RMS • 300W Peak • airtight rubber surround • cast aluminum basket • outboard 2-way crossover • suitable for marine use • sensitivity: 89dB

No Fit Icon Doesn't fit your SQ8

5-1/4" 2-Way MOMO Series Component System • 100W RMS • 300W Peak • airtight rubber surround • cast aluminum basket • outboard 2-way crossover • suitable for marine use • sensitivity: 89dB

Kicker SS56.2

5-1/4" 2-way SS Series Matched Component Speakers System

Go to item page Right Arrow Icon of Right Arrow

5-1/4" 2-way SS Series Matched Component Speakers System

5-1/4" 2-Way Matched Component System • 180W Peak • 90W RMS • 30mm Mylar Film Tweeter • Tri-Tech Cone • Crossovers and grilles included • Sealed and Tuned Tweeter Enclosure • Protective Case

No Fit Icon Doesn't fit your SQ8

5-1/4" 2-Way Matched Component System • 180W Peak • 90W RMS • 30mm Mylar Film Tweeter • Tri-Tech Cone • Crossovers and grilles included • Sealed and Tuned Tweeter Enclosure • Protective Case

Cerwin-Vega VMX-5.0 (V-Max 5.0)

5-1/4" 2-way VMax Series Convertible Full-Range Speakers / Component System (VMax5.0, VMX5.0, VMax 5.0, VMX-5, V-Max 5)

Go to item page Right Arrow Icon of Right Arrow

5-1/4" 2-way VMax Series Convertible Full-Range Speakers / Component System (VMax5.0, VMX5.0, VMax 5.0, VMX-5, V-Max 5)

5.25 VMax Series Component System • Can be mounted as standard full-range speakers or as separates (a component system) • 100W Max • 50W RMS • Pressed carbon graphite cone woofer • Rubber surround • 1" Titanium dome tweeter

No Fit Icon Doesn't fit your SQ8

5.25 VMax Series Component System • Can be mounted as standard full-range speakers or as separates (a component system) • 100W Max • 50W RMS • Pressed carbon graphite cone woofer • Rubber surround • 1" Titanium dome tweeter

Pioneer TS-C1353

5-1/4" 2-way Component Speakers System

Go to item page Right Arrow Icon of Right Arrow

5-1/4" 2-way Component Speakers System

5-1/4" 2-way Pioneer Component Speakers System • 150 Watts Peak • 50 Watts RMS • Injection Molded Polypropylene Composite Cone • Butyl Rubber Surround • Soft Dome Tweeter • 4 ohm • CCAW Voice Coil

No Fit Icon Doesn't fit your SQ8

5-1/4" 2-way Pioneer Component Speakers System • 150 Watts Peak • 50 Watts RMS • Injection Molded Polypropylene Composite Cone • Butyl Rubber Surround • Soft Dome Tweeter • 4 ohm • CCAW Voice Coil

Orion XTR52

5-1/4" XTR Series 2-Way Component Car Speaker System

Go to item page Right Arrow Icon of Right Arrow

5-1/4" XTR Series 2-Way Component Car Speaker System

5.25" 2-Way XTR Series Component Car Speakers • UV Coated Fiber Blended Cones • Butyl Rubber Surrounds • Silk Soft Dome Tweeters • Single Interlaced Conex Spiders • Stamped Steel Baskets • Tweeter Protection

No Fit Icon Doesn't fit your SQ8

5.25" 2-Way XTR Series Component Car Speakers • UV Coated Fiber Blended Cones • Butyl Rubber Surrounds • Silk Soft Dome Tweeters • Single Interlaced Conex Spiders • Stamped Steel Baskets • Tweeter Protection

JBL GT7-5C (Open Box Complete)

270W Peak (90W RMS) 5-1/4" 2-Way GT7-Series Component Speaker System

Go to item page Right Arrow Icon of Right Arrow

270W Peak (90W RMS) 5-1/4" 2-Way GT7-Series Component Speaker System

• Peak Power: 135W
• RMS Power: 45W
• 1-3/16" PEI Edge Driven Dome Tweeter
• Mounting Depth: 2-5/16"
• Polypropylene Plus One™ Cone and Foam Surround

No Fit Icon Doesn't fit your SQ8

• Peak Power: 135W
• RMS Power: 45W
• 1-3/16" PEI Edge Driven Dome Tweeter
• Mounting Depth: 2-5/16"
• Polypropylene Plus One™ Cone and Foam Surround

Audiobahn ABC525T

5-1/4" 2-way Component System

Go to item page Right Arrow Icon of Right Arrow

5-1/4" 2-way Component System

5-1/4" Component System with 1" tweeters, 120 watts RMS Power Handling

No Fit Icon Doesn't fit your SQ8

5-1/4" Component System with 1" tweeters, 120 watts RMS Power Handling

Crunch GRP5.2C

5-1/4" Ground Pounder Series Component Car Speakers

Go to item page Right Arrow Icon of Right Arrow

5-1/4" Ground Pounder Series Component Car Speakers

5.25" Ground Pounder Series Component System • 250W Max • 50W RMS • Silver alpha-cellulose cone woofer • Moisture resistant rubber surround • Neo mylar soft dome tweeter • External 12dB passive in-line crossover

No Fit Icon Doesn't fit your SQ8

5.25" Ground Pounder Series Component System • 250W Max • 50W RMS • Silver alpha-cellulose cone woofer • Moisture resistant rubber surround • Neo mylar soft dome tweeter • External 12dB passive in-line crossover

Rockford Fosgate P152-S Open Box Complete (Very Good, Used)

200W Max (100W RMS) 5-1/4" 2-Way Punch Series Component Car Speaker System

Go to item page Right Arrow Icon of Right Arrow

200W Max (100W RMS) 5-1/4" 2-Way Punch Series Component Car Speaker System

• Item Condition: Open Box
• Peak Power: 120W
• RMS Power: 60W
• Mica-Injected Polypropylene Cone
• Polyurethane Surround
• Aluminum Dome Tweeters
• Removable Motor Cover
• Concealing Ring

No Fit Icon Doesn't fit your SQ8

• Item Condition: Open Box
• Peak Power: 120W
• RMS Power: 60W
• Mica-Injected Polypropylene Cone
• Polyurethane Surround
• Aluminum Dome Tweeters
• Removable Motor Cover
• Concealing Ring

Kicker RS60.2 (09RS60.2)

5-1/4" / 6" 2-Way RS-Series Convertible Component Car Speaker System

Go to item page Right Arrow Icon of Right Arrow

5-1/4" / 6" 2-Way RS-Series Convertible Component Car Speaker System

• Peak Power: 180W
• RMS Power: 90W
• Curvilinear Polypropylene Cone
• 1" Elliptical Tweeter Dome
• Selectable Attenuation
• Tweeters Can Mount Coaxially

No Fit Icon Doesn't fit your SQ8

• Peak Power: 180W
• RMS Power: 90W
• Curvilinear Polypropylene Cone
• 1" Elliptical Tweeter Dome
• Selectable Attenuation
• Tweeters Can Mount Coaxially

MTX Audio TERMINATOR52 Open Box (Complete)

140W Peak (70W RMS) 5-1/4" 35W Terminator Series Component Speakers

Go to item page Right Arrow Icon of Right Arrow

140W Peak (70W RMS) 5-1/4" 35W Terminator Series Component Speakers

• Peak Power: 70W • RMS Power: 35W
• Separate 1" Semi-Dome Mylar Tweeter
• Mounting Depth: 2-1/8"
• Polypropylene Woofer Cone
• 4 Ohm Impedance

No Fit Icon Doesn't fit your SQ8

• Peak Power: 70W • RMS Power: 35W
• Separate 1" Semi-Dome Mylar Tweeter
• Mounting Depth: 2-1/8"
• Polypropylene Woofer Cone
• 4 Ohm Impedance

MB Quart ONX213

5-1/4" 2-Way ONYX Series Car Component Speakers System

Go to item page Right Arrow Icon of Right Arrow

5-1/4" 2-Way ONYX Series Car Component Speakers System

5-1/4" ONYX Series Speakers • 2-Way Component System • 90W Max • 35W RMS • 4 ohm Impedance • Polypropylene Cone • Butyl Rubber Surround • 30mm Titanium Dome Tweeter

No Fit Icon Doesn't fit your SQ8

5-1/4" ONYX Series Speakers • 2-Way Component System • 90W Max • 35W RMS • 4 ohm Impedance • Polypropylene Cone • Butyl Rubber Surround • 30mm Titanium Dome Tweeter

Boston Acoustics SR50

5-1/4" 2-Way SR Series Car Component Speakers System

Go to item page Right Arrow Icon of Right Arrow

5-1/4" 2-Way SR Series Car Component Speakers System

5.25" SR Series 2-Way Component System • 250W Max • 85W RMS • Copolymer cone woofer • Butyl rubber surround • 1" Kortec dome tweeter • External detachable crossover • Tweeter attenuation circuits (0, -2, -4 dB)

No Fit Icon Doesn't fit your SQ8

5.25" SR Series 2-Way Component System • 250W Max • 85W RMS • Copolymer cone woofer • Butyl rubber surround • 1" Kortec dome tweeter • External detachable crossover • Tweeter attenuation circuits (0, -2, -4 dB)

Sony XS-D130SI

5-1/4" 2-way Component System

Go to item page Right Arrow Icon of Right Arrow

5-1/4" 2-way Component System

5-1/4" Component System • 200W Max • 40W RMS • Vacuum formed polypropylene-polyester cone woofer • Butyl rubber surround • Soft dome tweeters with neodymium magnet • Variety of tweeter mounting options • 4 ohm impedance

No Fit Icon Doesn't fit your SQ8

5-1/4" Component System • 200W Max • 40W RMS • Vacuum formed polypropylene-polyester cone woofer • Butyl rubber surround • Soft dome tweeters with neodymium magnet • Variety of tweeter mounting options • 4 ohm impedance

Diamond Audio D651S

5-1/4" 2-way Component System (Silk Tweeters)

Go to item page Right Arrow Icon of Right Arrow

5-1/4" 2-way Component System (Silk Tweeters)

5-1/4" 2-way Component System with Silk Tweeters • 100 watts RMS • 200 watts Peak • 1" Silk Dome Tweeters • Copolymer Cones • Butyl Rubber Surrounds • High Density Composite Frames • Flat Progressive Spiders • Controlled Inductance Motor Design • Rubber Magnet Protector • External Crossover with Rear Audio Fill Outputs

No Fit Icon Doesn't fit your SQ8

5-1/4" 2-way Component System with Silk Tweeters • 100 watts RMS • 200 watts Peak • 1" Silk Dome Tweeters • Copolymer Cones • Butyl Rubber Surrounds • High Density Composite Frames • Flat Progressive Spiders • Controlled Inductance Motor Design • Rubber Magnet Protector • External Crossover with Rear Audio Fill Outputs

Go to item page Right Arrow Icon of Right Arrow

5-1/4" 2-way Component System • 70W RMS • Injection molded aluminum plated grained polypropylene cone • Butyl rubber surround • Flat linear roll spider • 25mm silk dome tweeter • External 24dB/octave acoustic crossover

No Fit Icon Doesn't fit your SQ8

5-1/4" 2-way Component System • 70W RMS • Injection molded aluminum plated grained polypropylene cone • Butyl rubber surround • Flat linear roll spider • 25mm silk dome tweeter • External 24dB/octave acoustic crossover

Go to item page Right Arrow Icon of Right Arrow

90W RMS Power Handling • 180W Peak • Silk dome tweeter • Titanium-plated Polymineral Woofer with Cast Aluminum Basket

90W RMS Power Handling • 180W Peak • Silk dome tweeter • Titanium-plated Polymineral Woofer with Cast Aluminum Basket

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

    2001 Subaru Forester

    2021 Audi SQ8

    2020 Genesis G90

    1971 Mercury Cyclone

    2006 BMW X3

    2010 Porsche Cayenne

    2008 Ford Taurus X

    2005 Subaru Impreza 2.5

    1997 BMW 328is

    2003 Mitsubishi Eclipse Spyder

    Vehicle
    Store
    Delete

    2013 Harley Davidson FLD Switchback

    2023 Harley Davidson FLHT Electra Glide Standard

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

    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.