Garage
Shop
Loading...
Filters
filter-icon Filters & Sort
Limited time!

MTX PS8C

600W Peak (300W RMS) 8" Coaxial 4-ohm Powersports Speakers

PS8C big
Go to item page Right Arrow Icon of Right Arrow

600W Peak (300W RMS) 8" Coaxial 4-ohm Powersports Speakers

• 300 watts Peak Each, 150 watts RMS Each
• Teteron Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 90.8 dB

shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $30.40 in rewards to spend later

install icon

Save $8 on install kits for this speaker

found car based on your search
Fits your RS3
List price $359.95
Save $55.99
-16% $303.96 /pair

Available

Ships in 10-14 days

• 300 watts Peak Each, 150 watts RMS Each
• Teteron Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 90.8 dB

Cerwin-Vega V465C

800W Peak (200W RMS) 6.5" Vega Series 2-Way 4-ohm Component Speaker System

V465C big
Go to item page Right Arrow Icon of Right Arrow

800W Peak (200W RMS) 6.5" Vega Series 2-Way 4-ohm Component Speaker System

• 400 watts Peak Each, 100 watts RMS Each
• 1" Titanium Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 94 dB

shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $18.00 in rewards to spend later

install icon

Save $35 on install kits for this speaker

found car based on your search
Fits multiple locations in your RS3
11
List price $215.99
-17% $179.99 /set

In stock

NVX - Worth the Envy - Direct to Consumer Car Audio

DS18 ZXI-354

240W Peak (80W RMS) 3.5” ZXI Series 4-ohm Full-Range Car Speakers

ZXI-354 big
Go to item page Right Arrow Icon of Right Arrow

240W Peak (80W RMS) 3.5” ZXI Series 4-ohm Full-Range Car Speakers

• 120 watts Peak Each, 40 watts RMS Each
• Glass Fiber cone material
• Impedance: 4 ohm
• Sensitivity: 86 dB

shipping truck icon Free shipping in USA. Provide zip for delivery date.
install icon

Save $8 on install kits for this speaker

found car based on your search
Fits multiple locations in your RS3
  • Center Dash
  • Front Door
  • Rear Deck Corner
3
$59.95 /pair

In stock.

Used from: $35.97
Limited time!

American Bass SQ 6.5

320W Peak (160W RMS) 6.5" SQ Series 2 Way Full Range Coaxial 4-ohm Speakers

SQ 6.5 big
Go to item page Right Arrow Icon of Right Arrow

320W Peak (160W RMS) 6.5" SQ Series 2 Way Full Range Coaxial 4-ohm Speakers

• 160 watts Peak Each, 80 watts RMS Each
• Swivel 3/4" Neodymium Dome tweeters
• Carbon Fiber cone material
• Impedance: 4 ohm
• Sensitivity: 89 dB

Free Speaker Accessory at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.
install icon

Save $23 on install kits for this speaker

found car based on your search
Fits multiple locations in your RS3
List price $92.12
-29% $65.78 /pair

In stock.

Limited time!

Diamond Audio DES365C

280W Peak (140W RMS) 6.5" Diamond Elite Series 3-Way 4-ohm Component Speaker System

DES365C big
Go to item page Right Arrow Icon of Right Arrow

280W Peak (140W RMS) 6.5" Diamond Elite Series 3-Way 4-ohm Component Speaker System

• 140 watts Peak Each, 70 watts RMS Each
• 1" Aluminum Dome Tweeters
• Composite foam core carbon fiber cone material
• Impedance: 4 ohm
• Sensitivity: 87 dB

Free Speaker Accessory Kit at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $55.00 in rewards to spend later

install icon

Save $35 on install kits for this speaker

found car based on your search
Fits multiple locations in your RS3
$549.99 /set

In stock.

Limited time!

Kicker KSS65 (51KSS6504) (Like New (Open Box))

500W Peak (250W RMS) 6.5" KS Series 2-Way 4-ohm Component Speaker System

51KSS6504 big
Go to item page Right Arrow Icon of Right Arrow

500W Peak (250W RMS) 6.5" KS Series 2-Way 4-ohm Component Speaker System

• 250 watts Peak Each, 125 watts RMS Each
• 1" Silk Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 90 dB

10% Off Open Box!
shipping truck icon Free shipping in USA. Provide zip for delivery date.
install icon

Install kits available for this speaker

found car based on your search
Fits multiple locations in your RS3
List price $279.99
-24% $212.49 /set
$191.24 with coupon | Price details

In stock

Only 3 Left!

Diamond Audio DMD35

80W Peak (40W RMS) 3.5” DMD Series Full-Range Car Speakers with Adaptor for BMW

DMD35 big
Go to item page Right Arrow Icon of Right Arrow

80W Peak (40W RMS) 3.5” DMD Series Full-Range Car Speakers with Adaptor for BMW

• 40 watts Peak Each, 20 watts RMS Each
• Includes square, triangle (BMW) and universal adaptors
• 0.79" Silk Dome tweeters
• Polypropylene cone material
• Sensitivity: 84 dB

shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $11.00 in rewards to spend later

install icon

Save $8 on install kits for this speaker

found car based on your search
Fits multiple locations in your RS3
  • Center Dash
  • Front Door
  • Rear Deck Corner
$109.99 /pair

Available

Ships in 10-14 days

Limited time!

Infinity Primus 603CF (PR603CF)

360W Peak (120W RMS) 6.5" Primus Series 2 Way 3-ohm Component Speaker System

PR603CF big
Go to item page Right Arrow Icon of Right Arrow

360W Peak (120W RMS) 6.5" Primus Series 2 Way 3-ohm Component Speaker System

• 180 watts Peak Each, 60 watts RMS Each
• 3/4" Silk Edge Driven Dome tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 92 dB

Free Speaker Accessory at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $13.00 in rewards to spend later

install icon

Save $14 on install kits for this speaker

found car based on your search
Fits multiple locations in your RS3
1
List price $159.95
-19% $129.95 /set

In stock

Only 2 Left!

Diamond Audio DMDX35

150W Peak (50W RMS) 3.5" DMD Series 2-Way Cocentric Coaxial 4-ohm Speakers

DMDX35 big
Go to item page Right Arrow Icon of Right Arrow

150W Peak (50W RMS) 3.5" DMD Series 2-Way Cocentric Coaxial 4-ohm Speakers

• 75 watts Peak Each, 25 watts RMS Each
• Dome Tweeters
• Treated Paper cone material
• Impedance: 4 ohm
• Sensitivity: 82 dB

shipping truck icon Free shipping in USA. Provide zip for delivery date.
install icon

Save $8 on install kits for this speaker

found car based on your search
Fits multiple locations in your RS3
  • Center Dash
  • Front Door
  • Rear Deck Corner
$89.99 /pair

In stock.

Limited time!

JBL Club 64C (JBLSPKCB64C)

420W Peak (140W RMS) 6.5" Club Series 2 Way 3-ohm Component Speaker System

Club 64C big
Go to item page Right Arrow Icon of Right Arrow

420W Peak (140W RMS) 6.5" Club Series 2 Way 3-ohm Component Speaker System

• 210 watts Peak Each, 70 watts RMS Each
• Silk Edge Driven Dome tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 92 dB

Free Baffles with Select Speakers Shop deal
shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $20.00 in rewards to spend later

install icon

Save $35 on install kits for this speaker

found car based on your search
Fits multiple locations in your RS3
List price $229.95
-13% $199.95 /set

In stock

Sundown Audio SA-6.5M 6.5" (SA65M)

400W Peak (200W RMS) 6.5" SA Series Midrange 4-ohm Speakers (S-SA6.5M)

S-SA6.5M big
Go to item page Right Arrow Icon of Right Arrow

400W Peak (200W RMS) 6.5" SA Series Midrange 4-ohm Speakers (S-SA6.5M)

• 200 watts Peak Each, 100 watts RMS Each
• Woven Carbon Fiber cone material
• Impedance: 4 ohm
• Sensitivity: 89 dB

shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $35.00 in rewards to spend later

install icon

Install kits available for most vehicles

found car based on your search
Fits multiple locations in your RS3
List price $419.99
-17% $349.99 /pair

Available

Ships in 10-14 days

Limited time!

Infinity REF607CF (INFSPKRF607CFUS)

540W Peak (180W RMS) 6.5" Reference Series 2 Way 3-ohm Component Speaker System

REF607CF big
Go to item page Right Arrow Icon of Right Arrow

540W Peak (180W RMS) 6.5" Reference Series 2 Way 3-ohm Component Speaker System

• 270 watts Peak Each, 90 watts RMS Each
• 3/4" Textile Edge Driven Dome tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

Free Baffles with Select Speakers Shop deal
shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $22.00 in rewards to spend later

install icon

Save $35 on install kits for this speaker

found car based on your search
Fits multiple locations in your RS3
17
List price $249.95
-12% $219.95 /set

In stock.

Used from: $186.96

Hertz CK 165 + FREE $100 Gift Card

6.5" Cento Series 2-Way Component Speaker system

CK 165, 100EGIFT big
Go to item page Right Arrow Icon of Right Arrow

6.5" Cento Series 2-Way Component Speaker system

• 142 Watts Max Each, 45 Watts RMS Each
•Semi Pressed Paper-Mica cone material
• Tetolon Tweeter dome
• 4 Ohm Impedance
• Sensitivity: 93 dB
• Mounting Depth: 2"

shipping truck icon Free shipping in USA. Provide zip for delivery date.
install icon

Save $35 on install kits for this speaker

found car based on your search
Fits multiple locations in your RS3
6
List price $580.00
-31% $399.99 /set

In stock

Only 1 Left!

• 142 Watts Max Each, 45 Watts RMS Each
•Semi Pressed Paper-Mica cone material
• Tetolon Tweeter dome
• 4 Ohm Impedance
• Sensitivity: 93 dB
• Mounting Depth: 2"

Hertz CK 165L + FREE $100 Gift Card

6.5" Cento Series 2-Way Component Speaker system

CK 165L, 100EGIFT big
Go to item page Right Arrow Icon of Right Arrow

6.5" Cento Series 2-Way Component Speaker system

• 150 Watts Max Each, 50 Watts RMS Each
•Non Pressed Paper cone material
• Tetolon Tweeter dome
• 4 Ohm Impedance
• Sensitivity: 92 dB

shipping truck icon Free shipping in USA. Provide zip for delivery date.
install icon

Install kits available for this speaker

found car based on your search
Fits multiple locations in your RS3
7
List price $560.00
-29% $399.99 /set

In stock

Only 3 Left!

• 150 Watts Max Each, 50 Watts RMS Each
•Non Pressed Paper cone material
• Tetolon Tweeter dome
• 4 Ohm Impedance
• Sensitivity: 92 dB

DS18 PRO-X8.4BMPK

1100W Peak (550W RMS) 8” PRO-X Series 4-ohm Component Midrange Car Speakers

PRO-X8.4BMPK big
Go to item page Right Arrow Icon of Right Arrow

1100W Peak (550W RMS) 8” PRO-X Series 4-ohm Component Midrange Car Speakers

• 550 watts Peak Each, 275 watts RMS Each
• 1" Aluminum Bullet tweeters
• Non-Pressed Paper cone material
• Impedance: 4 ohm
• Sensitivity: 103 dB

shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $16.79 in rewards to spend later

install icon

Save $8 on install kits for this speaker

found car based on your search
Fits your RS3
2
$167.95 /set

In stock

Limited time!

Earthquake Sound T65

800W Peak 6.5" TNT Series 2-Way Coaxial 4-ohm Car Speakers

T65 big
Go to item page Right Arrow Icon of Right Arrow

800W Peak 6.5" TNT Series 2-Way Coaxial 4-ohm Car Speakers

• 400 watts Peak Each
• 1.18" Mylar Dome Tweeters
• Poly-Injection cone material
• Impedance: 4 ohm
• Sensitivity: 89 dB

Free Speaker Accessory at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $13.60 in rewards to spend later

install icon

Install kits available for this speaker

found car based on your search
Fits multiple locations in your RS3
$135.99 /pair

In stock.

Earthquake Sound VTEK-62

1000W RMS 6.5" VTEK Series 2-Way Coaxial 4-ohm Car Speakers

VTEK-62 big
Go to item page Right Arrow Icon of Right Arrow

1000W RMS 6.5" VTEK Series 2-Way Coaxial 4-ohm Car Speakers

• 500 watts RMS Each
• 3/4" Silk Dome swiveling tweeters
• Glass Carbon Fiber cone material
• Impedance: 4 ohm
• Sensitivity: 90 dB

shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $13.60 in rewards to spend later

install icon

Install kits available for this speaker

found car based on your search
Fits multiple locations in your RS3
1
List price $179.00
-24% $135.99 /pair

In stock.

Limited time!

Hertz MPK165P.3

460W Peak (230W RMS) 6.5" Mille PRO Series 2-way 3-ohm Component Speaker System

MPK 165P.3 big
Go to item page Right Arrow Icon of Right Arrow

460W Peak (230W RMS) 6.5" Mille PRO Series 2-way 3-ohm Component Speaker System

• 230 watts Peak Each, 115 watts RMS Each
• Tetolon Soft Dome tweeters
• Pressed Pulp Fiber cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

Free Speaker Accessory Kit at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $65.00 in rewards to spend later

install icon

Save $35 on install kits for this speaker

found car based on your search
Fits multiple locations in your RS3
List price $765.00
-15% $649.99 /set

Available

Ships in 10-14 days

Limited time!

Cerwin-Vega V65C

840W Peak (280W RMS) 6.5" Vega Series 2025 Edition 2-Way Component 4-ohm Speaker System

V65C big
Go to item page Right Arrow Icon of Right Arrow

840W Peak (280W RMS) 6.5" Vega Series 2025 Edition 2-Way Component 4-ohm Speaker System

• 420 watts Peak Each, 140 watts RMS Each
• 1" Silk Balanced Dome Tweeters
• Carbon Fiber Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB

Free Baffles with Select Speakers Shop deal
shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $28.00 in rewards to spend later

install icon

Save $35 on install kits for this speaker

found car based on your search
Fits multiple locations in your RS3
$279.99 /set

In stock

DS18 PRO-CF6.4SL (Sold Individually)

500W Peak (250W RMS) 6.5” PRO Series Water-Resistant Motorcycle and Motorsports Mid-Bass Loudspeaker

PRO-CF6.4SL big
Go to item page Right Arrow Icon of Right Arrow

500W Peak (250W RMS) 6.5” PRO Series Water-Resistant Motorcycle and Motorsports Mid-Bass Loudspeaker

• Peak Each, RMS Each
• Water Resistant Carbon Fiber material
• Impedance: 4 ohm
• Sensitivity: 95 dB
Priced Per Each Speaker

shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $8.40 in rewards to spend later

install icon

Save $35 on install kits for this speaker

found car based on your search
Fits multiple locations in your RS3
1
$83.95

In stock

NVX - Worth the Envy - Direct to Consumer Car Audio

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?
    FAQ for Speakers in 2018 RS3

    Q: Can I upgrade or change the Speakers in 2018 Audi RS3?

    A: Yes this page includes all the best Speakers that work in your RS3.

    Save up to 10 different vehicles in your garage
    Vehicle
    Store
    Delete

    1979 Cadillac Eldorado

    2019 Lexus RX350

    2018 Audi RS3

    1989 Mitsubishi Mighty Max

    2023 BMW 7 Series

    1991 Subaru Justy

    1993 GMC R-V Crew

    1986 BMW 528e

    2023 Chevrolet Express 2500

    1994 Toyota Paseo

    Vehicle
    Store
    Delete

    1986 Harley Davidson FLHT Electra Glide Standard

    2001 Harley Davidson FLHTC/I Electra Glide Classic

    2019 Harley Davidson FLHT Electra Glide Standard

    Vehicle
    Store
    Delete

    2017 Can-Am Defender MAX HD8 DPS

    2014 Can-Am Commander E

    2013 Can-Am Commander E

    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.