Garage
Shop

1978 Mazda RX-4

The best Rear Deck Corner Speakers for 1978 RX-4

Rear Deck Corner for 1978 Mazda RX-4

Shop and compare by low prices and top features on Rear Deck Corner Speakers that fit your Mazda RX-4. After you add to cart, we'll also make sure you get an affordable car speakers install easily with speaker adapters, speaker harnesses and other accessories like sound damping and panel tools to make installation a breeze.

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

MTX Audio TERMINATOR52

140W Peak (70W RMS) 5.25" Terminator Series 2 Way Component 4-ohm Speakers

TERMINATOR52 big
Go to item page Right Arrow Icon of Right Arrow

140W Peak (70W RMS) 5.25" Terminator Series 2 Way Component 4-ohm Speakers

• 70 watts Peak Each, 35 watts RMS Each
• 1" Mylar Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 83.6 dB

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

Free or discounted install kits when available.

Fits select models only.
Add details to confirm fitment.
5
List price $129.95
-69% $39.99 /set

In stock

Limited time!

Infinity Primus 503CF (PR503CF)

300W Peak (100W RMS) 5.25” Primus Series 2 Way 3-ohm Component Speaker System

PR503CF big
Go to item page Right Arrow Icon of Right Arrow

300W Peak (100W RMS) 5.25” Primus Series 2 Way 3-ohm Component Speaker System

• 150 watts Peak Each, 50 watts RMS Each
• 3/4" Silk Edge Driven Dome Tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 91 dB

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

VIP Product Get $12.00 in rewards to spend later

install icon

Free or discounted install kits when available.

Fits select models only.
Add details to confirm fitment.
1
List price $149.95
-20% $119.95 /set

In stock

Limited time!

Cerwin-Vega V525

600W Peak (200W RMS) 5.25" Vega Series 2025 Edition 2-Way Coaxial 4-ohm Speakers

V525 big
Go to item page Right Arrow Icon of Right Arrow

600W Peak (200W RMS) 5.25" Vega Series 2025 Edition 2-Way Coaxial 4-ohm Speakers

• 300 watts Peak Each, 100 watts RMS Each
• 3/4" Silk Balanced Dome Tweeters
• Carbon Fiber Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 86 dB

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

Free or discounted install kits when available.

Fits select models only.
Add details to confirm fitment.
1
$149.99 /pair

In stock

Hifonics ZS525CX

400W Peak (60W RMS) 5.25” Zeus Series 2-way 4-ohm Coaxial Car Speakers

ZS525CX big
Go to item page Right Arrow Icon of Right Arrow

400W Peak (60W RMS) 5.25” Zeus Series 2-way 4-ohm Coaxial Car Speakers

• 200 watts Peak Each, 30 watts RMS Each
• 1" Neo-Mylar Soft Dome tweeters with Kapton former
• Alpha-Cellulose cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB

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

Free or discounted install kits when available.

Fits select models only.
Add details to confirm fitment.
7
List price $28.99
-31% $19.99 /pair

In stock

Limited time!

Kicker PS52504 (10PS52504)

200W Peak (100W RMS) 5.25” PS Series 2-Way Coaxial 4-Ohm Harley-Davidson Powersports and Motorcycle Speakers

10PS52504 big
Go to item page Right Arrow Icon of Right Arrow

200W Peak (100W RMS) 5.25” PS Series 2-Way Coaxial 4-Ohm Harley-Davidson Powersports and Motorcycle Speakers

• 100 watts Peak Each, 50 watts RMS Each
• 3/4" Titanium Dome Tweeter
• Protective speaker grilles included
• Polypropylene Material
• Impedance: 4 ohm
• Sensitivity: 88.3 dB
• Mounting Depth: 2-3/16"

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

Free or discounted install kits when available.

Fits select models only.
Add details to confirm fitment.
List price $169.99
Save $50.03
-29% $119.96 /pair

In stock

• 100 watts Peak Each, 50 watts RMS Each
• 3/4" Titanium Dome Tweeter
• Protective speaker grilles included
• Polypropylene Material
• Impedance: 4 ohm
• Sensitivity: 88.3 dB
• Mounting Depth: 2-3/16"

Limited time!

Kicker KSS5 (51KSS504)

400W Peak (200W RMS) 5.25" KS Series 2 Way Component 4-ohm Speaker System

51KSS504 big
Go to item page Right Arrow Icon of Right Arrow

400W Peak (200W RMS) 5.25" KS Series 2 Way Component 4-ohm Speaker System

• 200 watts Peak Each, 100 watts RMS Each
• 1" Silk Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB

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

VIP Product Get $25.00 in rewards to spend later

install icon

Free or discounted install kits when available.

Fits select models only.
Add details to confirm fitment.
2
List price $279.99
-11% $249.99 /set

In stock

Only 2 Left!

JL Audio C1-525x

100W RMS 5.25" C1 Series 2 Way Coaxial 4-ohm Car Speakers

C1-525x big
Go to item page Right Arrow Icon of Right Arrow

100W RMS 5.25" C1 Series 2 Way Coaxial 4-ohm Car Speakers

• 50 watts RMS Each
• 3/4" Silk-Suspended Aluminum Edge Driven Dome tweeters
• Mineral-Filled Polypropylene 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 $13.00 in rewards to spend later

install icon

Free or discounted install kits when available.

Fits select models only.
Add details to confirm fitment.
6
$129.99 /pair

In stock

Used from: $110.49
Limited time!

Infinity Kappa 503CF (INFSPKKA503CFAM)

480W Peak (160W RMS) 5.25" Kappa Series 2-Way Component 3-ohm Speaker System

Kappa 503CF big
Go to item page Right Arrow Icon of Right Arrow

480W Peak (160W RMS) 5.25" Kappa Series 2-Way Component 3-ohm Speaker System

• 240 watts Peak Each, 80 watts RMS Each
• 3/4" Silk Edge Driven Dome uni-pivot and angled tweeters
• Glass Fiber cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

Free Speaker Accessory at Checkout!
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

Free or discounted install kits when available.

Fits select models only.
Add details to confirm fitment.
1
List price $449.95
Save $169.96
-38% $279.99 /set

In stock

Used from: $279.30
Limited time!

JL Audio C2-525x

120W RMS 5.25" C2 Series 2 Way Coaxial 4-ohm Car Speakers

C2-525X big
Go to item page Right Arrow Icon of Right Arrow

120W RMS 5.25" C2 Series 2 Way Coaxial 4-ohm Car Speakers

• 60 watts RMS Each
• 3/4" Silk Dome tweeters
• Mica Injected Polypropylene - MIPP 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 $28.00 in rewards to spend later

install icon

Free or discounted install kits when available.

Fits select models only.
Add details to confirm fitment.
8
$279.99 /pair

In stock

Only 3 Left!

Limited time!

Cerwin-Vega XED525C

500W Peak (60W RMS) 5.25” XED Series 2-Way 4-ohm Component Speaker System

XED525C big
Go to item page Right Arrow Icon of Right Arrow

500W Peak (60W RMS) 5.25” XED Series 2-Way 4-ohm Component Speaker System

• 250 watts Peak Each, 30 watts RMS Each
• 1/2" Metal Balanced Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 94 dB

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

Free or discounted install kits when available.

Fits select models only.
Add details to confirm fitment.
8
List price $71.99
-17% $59.99 /set

In stock

PRV Audio 5MR450-NDY-4 (Sold Individually)

900W Peak (450W RMS) 5" MR Series Pro Audio Midrange 4-ohm Car Speaker

5MR450-NDY-4 big
Go to item page Right Arrow Icon of Right Arrow

900W Peak (450W RMS) 5" MR Series Pro Audio Midrange 4-ohm Car Speaker

• 900 watts Peak, 450 watts RMS
• Carbon Fiber 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 $10.99 in rewards to spend later

install icon

Free or discounted install kits when available.

Fits select models only.
Add details to confirm fitment.
List price $137.39
-20% $109.91

In stock

Limited time!

JBL Stage3 527 (STAGE3527AM)

400W Peak (80W RMS) 5.25” Stage3 Series 2 Way Coaxial 3-ohm Speakers

Stage3 527 big
Go to item page Right Arrow Icon of Right Arrow

400W Peak (80W RMS) 5.25” Stage3 Series 2 Way Coaxial 3-ohm Speakers

• 200 watts Peak Each, 40 watts RMS Each
• Polypropylene cone material with Plus One woofer architecture
• Impedance: 3 ohm
• Sensitivity: 91 dB

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

Free or discounted install kits when available.

Fits select models only.
Add details to confirm fitment.
2
List price $109.95
Save $40.00
-36% $69.95 /pair

In stock

Limited time!

Infinity Kappa 53XF (INFSPKKA53XFAM)

360W Peak (120W RMS) 5.25" Kappa Series 2-Way Coaxial 3-ohm Car Speakers

Kappa 53XF big
Go to item page Right Arrow Icon of Right Arrow

360W Peak (120W RMS) 5.25" Kappa Series 2-Way Coaxial 3-ohm Car Speakers

• 180 watts Peak Each, 60 watts RMS Each
• Silk Edge Driven Dome tweeters
• Glass Fiber cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

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

VIP Product Get $16.00 in rewards to spend later

install icon

Free or discounted install kits when available.

Fits select models only.
Add details to confirm fitment.
List price $249.95
Save $90.00
-36% $159.95 /pair

In stock

Limited time!

Cerwin-Vega H525C

600W Peak (200W RMS) 5.25" HED Series 4-ohm 2-Way Component Speaker System

H525C big
Go to item page Right Arrow Icon of Right Arrow

600W Peak (200W RMS) 5.25" HED Series 4-ohm 2-Way Component Speaker System

• 300 watts Peak Each, 100 watts RMS Each
• 1" PEI (Polyetherimide) Balanced Dome tweeters
• Responsive Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 86 dB

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

VIP Product Get $19.00 in rewards to spend later

install icon

Free or discounted install kits when available.

Fits select models only.
Add details to confirm fitment.
List price $227.99
-17% $189.99 /set

In stock

Cerwin-Vega XED52

550W Peak (60W RMS) 5.25" XED Series 2-Way Coaxial 4-ohm Speakers

XED52 big
Go to item page Right Arrow Icon of Right Arrow

550W Peak (60W RMS) 5.25" XED Series 2-Way Coaxial 4-ohm Speakers

• 275 watts Peak Each, 30 watts RMS Each
• 1" Piezo Metal Balanced Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 94 dB

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

Free or discounted install kits when available.

Fits select models only.
Add details to confirm fitment.
7
List price $53.99
-17% $44.99 /pair

In stock

Limited time!

MTX Audio THUNDER51

360W Peak (180W RMS) 5.25" Thunder Series 2-way 4-ohm Component Speakers System

THUNDER51 big
Go to item page Right Arrow Icon of Right Arrow

360W Peak (180W RMS) 5.25" Thunder Series 2-way 4-ohm Component Speakers System

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

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

VIP Product Get $25.00 in rewards to spend later

install icon

Free or discounted install kits when available.

Fits select models only.
Add details to confirm fitment.
1
$249.95 /set

In stock

Limited time!

Pioneer TS-A1301C

600W Peak (100W RMS) 5.25" A-Series 2-Way 4-ohm Component Speakers

TS-A1301C big
Go to item page Right Arrow Icon of Right Arrow

600W Peak (100W RMS) 5.25" A-Series 2-Way 4-ohm Component Speakers

• 300 watts Peak Each, 50 watts RMS Each
• 1-3/16" Polyetherimide Hard Dome tweeters
• Injection Molded Polypropylene 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 $14.00 in rewards to spend later

install icon

Free or discounted install kits when available.

Fits select models only.
Add details to confirm fitment.
List price $170.00
-18% $140.00 /set

In stock

Only 3 Left!

MTX TERMINATOR35

80W Peak (40W RMS) 3.5" Terminator Series 2 Way Coaxial 4-ohm Car Speakers

TERMINATOR35 big
Go to item page Right Arrow Icon of Right Arrow

80W Peak (40W RMS) 3.5" Terminator Series 2 Way Coaxial 4-ohm Car Speakers

• 40 watts Peak Each, 20 watts RMS Each
• Silk Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 86 dB

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

Free or discounted install kits when available.

Fits select models only.
Add details to confirm fitment.
List price $59.95
-17% $49.95 /pair

In stock

Precision Power (PPI) MAS.522

150W RMS 5.25" MAS Series 2 Way Coaxial 2-ohm Motorcycle Speakers

MAS.522 big
Go to item page Right Arrow Icon of Right Arrow

150W RMS 5.25" MAS Series 2 Way Coaxial 2-ohm Motorcycle Speakers

• 75 watts RMS Each
• 1" Titanium Dome tweeters
• Polypropylene cone material
• Impedance: 2 ohm
• Sensitivity: 92 dB

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

VIP Product Get $27.00 in rewards to spend later

install icon

Free or discounted install kits when available.

Fits select models only.
Add details to confirm fitment.
1
List price $349.99
-23% $269.99 /pair

In stock

Only 3 Left!

• 75 watts RMS Each
• 1" Titanium Dome tweeters
• Polypropylene cone material
• Impedance: 2 ohm
• Sensitivity: 92 dB

Precision Power (PPI) MAS.524

150W RMS 5.25" MAS Series 2 Way Coaxial 4-ohm Motorcycle Speakers

MAS.524 big
Go to item page Right Arrow Icon of Right Arrow

150W RMS 5.25" MAS Series 2 Way Coaxial 4-ohm Motorcycle Speakers

• Peak Each, 75 watts RMS Each
• 1" Titanium Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 92 dB

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

VIP Product Get $27.00 in rewards to spend later

install icon

Free or discounted install kits when available.

Fits select models only.
Add details to confirm fitment.
1
List price $349.99
-23% $269.99 /pair

In stock

• Peak Each, 75 watts RMS Each
• 1" Titanium Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 92 dB

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 Rear Deck Corner Speakers in 1978 RX-4

    Q: Can I upgrade or change the Rear Deck Corner Speakers in 1978 Mazda RX-4?

    A: Yes this page includes all the best Rear Deck Corner Speakers that work in your RX-4.

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

    1978 Mazda RX-4

    2004 Honda S2000

    2000 Nissan Maxima

    2009 Kia Spectra5

    1989 Mazda MPV

    1983 Buick LeSabre

    1990 Subaru Loyale

    2007 Ford Focus ZX5

    1992 Mazda B2600

    2018 Genesis G90

    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.