Garage
Shop
Account Icon
Account
Box Icon
Track
order
Telephone Icon
Call
Help Icon
Help
Door with Arrow Icon
Sign In

1978 Mazda GLC

Change vehicle | Remove vehicle

Overview Upgrade your Speakers Add a Subwoofer Add an Amplifier Digital Sound Processors Audio Installation & Accessories Add a Backup Camera Dads & Grads Sale

Speakers & Speaker Installation for 1978 Mazda GLC

Find speakers to upgrade your sound and fit in the factory speaker location for your GLC.  After you choose your speakers, we'll help you find speaker adapters, speaker harnesses and other accessories for installation.

All car speakers

Shop All Speaker Locations in the Vehicle

See all speakers that fit, regardless of location.

Front Door Panel Speakers

Front Door Speakers

Speakers for your front door panels

Rear Door Panel Speakers

Rear Door Panel Speakers

Speakers for your rear door panels

Rear Seat Side Panel Speakers

Rear Seat Side Panel Speakers

Speakers for your rear seat side panel.

Tailgate Speakers

Tailgate Speakers

Speakers for your tailgate.

Dads & Grads Sale

Dads & Grads Sale

Free Gear / Open-Box Deals / Huge Discounts up to 40% off Car / Marine / ATV Audio

Filters
Reset Done
Product Type
Price Range
Speaker Location
Speaker Size
Refers to the size of the speaker measured in inches. Every vehicle has standard application sizes. Please use our vehicle fitment guide for your vehicle's specific speaker sizes if you do not know them.
Design
The number of individual drivers in a car speaker. Speakers with 2 drivers are known as a 2-way, and 3 drivers are known as a 3-way. Component systems are often referred to as "separates" because the tweeter is not attached to the midwoofer (main speaker driver) and mounts separately in a location such as a door post. Component systems typically come with an external crossover so you can easily adjust the high and low frequencies sent to both the midwoofer and the tweeter. Center channel speakers are great for those looking to have surround sound in their vehicle.
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.
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".
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.
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.
Tweeter Design
Designs such as cone, dome, semi-dome, balanced dome, and whizzer are most popular. Cone tweeters are simple, efficient and typically are the most reasonably priced. Dome tweeters are used in most home speakers, and provide a smoother and more accurate sound. Semi-dome design is one with a dome placed inside a cone. A Balanced dome driver is a semi-dome with equal reproduction area given the cone and dome portions of the driver. A whizzer tweeter is a separate tweeter cone driven by the voice coil of the woofer.
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.
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
Availability
filter-icon Filters & Sort

JBL Club 522F (SPKCB522FAM)

270W Peak (90W RMS) 5.25" Club Series 2 Way Coaxial 3-ohm Speakers

Club 522F big
Go to item page Right Arrow Icon of Right Arrow

JBL Club 522F (SPKCB522FAM)

270W Peak (90W RMS) 5.25" Club Series 2 Way Coaxial 3-ohm Speakers

• 135 watts Peak Each, 45 watts RMS Each
• Silk Edge Driven Dome tweeters
• UV-Resistant Polypropylene cone material
• Plus One woofer architecture
• Impedance: 3 ohm
• Sensitivity: 91 dB

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

Install kits available for most vehicles

additional information required
Fits select locations in your GLC.
Add vehicle details to confirm exact location.
1
List price $129.95
-42% $74.99 /pair

In stock

Add to Cart

Infinity Reference 5030cx (REF5030CX)

390W Peak (130W RMS) 5.25" Reference Series 2-Way 3-ohm Component Speaker System

Reference 5030cx big
Go to item page Right Arrow Icon of Right Arrow

Infinity Reference 5030cx (REF5030CX)

390W Peak (130W RMS) 5.25" Reference Series 2-Way 3-ohm Component Speaker System

• 195 watts Peak Each, 65 watts RMS Each
• 3/4" Textile Edge Driven Dome tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

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

Install kits available for most vehicles

additional information required
Fits select locations in your GLC.
Add vehicle details to confirm exact location.
2
List price $249.95
-60% $99.95 /set

In stock

Add to Cart
Used from: $139.99
See all 12 special offers
NVX - Worth the Envy - Direct to Consumer Car Audio

JBL Stage3 427F (Stage 3 427F) (2-Pairs, 4-Total)

600Peak (120W RMS) 4" Stage 3 Series 2-Way Coaxial Car Speakers (2-Pairs)

STAGE3427FAM_2 big
Go to item page Right Arrow Icon of Right Arrow

JBL Stage3 427F (Stage 3 427F) (2-Pairs, 4-Total)

600Peak (120W RMS) 4" Stage 3 Series 2-Way Coaxial Car Speakers (2-Pairs)

• 150 watts Peak Each, 30 watts RMS Each
• 3/4" Edge-driven Dome Tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 90 dB

Save 15% Off Package Deals at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.
additional information required
Fits select locations in your GLC.
Add vehicle details to confirm exact location.
3
List price $179.90
-22% $139.90

In stock

Only 1 Left!

Add to Cart

• 150 watts Peak Each, 30 watts RMS Each
• 3/4" Edge-driven Dome Tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 90 dB

Polk Audio DB402 (DB 402)

270W Peak (90W RMS) 4" DB+ Series 2 Way Coaxial 4-ohm Car, Marine and Powersports Speakers

DB402 big
Go to item page Right Arrow Icon of Right Arrow

Polk Audio DB402 (DB 402)

270W Peak (90W RMS) 4" DB+ Series 2 Way Coaxial 4-ohm Car, Marine and Powersports Speakers

• 135 watts Peak Each, 45 watts RMS Each
• 3/4" Silk Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 90 dB

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

Install kits available for most vehicles

additional information required
Fits select locations in your GLC.
Add vehicle details to confirm exact location.
35
List price $99.99
-10% $90.00 /pair

In stock

Add to Cart
See all 8 special offers

Pioneer TS-A1081F

460W Peak (100W RMS) 4” A Series 2-way 4-ohm Coaxial Car Speakers

TS-A1081F big
Go to item page Right Arrow Icon of Right Arrow

Pioneer TS-A1081F

460W Peak (100W RMS) 4” A Series 2-way 4-ohm Coaxial Car Speakers

• 230 watts Peak Each, 50 watts RMS Each
• 1" PEI (Polyetherimide) Hard Dome tweeters
• Carbon and Mica Reinforced Injection Molded Polypropylene 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 $9.00 in rewards to spend later

install icon

Install kits available for most vehicles

additional information required
Fits select locations in your GLC.
Add vehicle details to confirm exact location.
3
List price $110.00
-18% $90.00 /pair

In stock

Add to Cart
Used from: $80.00
See all 8 special offers

Diamond Audio DMDX5

240W Peak (80W RMS) 5" DMD Series 2-Way Cocentric Coaxial 4-ohm Speakers

DMDX5 big
Go to item page Right Arrow Icon of Right Arrow

Diamond Audio DMDX5

240W Peak (80W RMS) 5" DMD Series 2-Way Cocentric Coaxial 4-ohm Speakers

• 120 watts Peak Each, 40 watts RMS Each
• Dome Tweeters
• Treated Paper cone material
• Impedance: 4 ohm
• Sensitivity: 85 dB

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

Install kits available for most vehicles

additional information required
Fits select locations in your GLC.
Add vehicle details to confirm exact location.
$159.99 /pair

In stock.

Add to Cart
Limited time!

AudioControl PNW-525

150W Peak (100W RMS) 5.25″ PNW Series 2-way 3-ohm Coaxial Car Speakers

PNW-525 big
Go to item page Right Arrow Icon of Right Arrow

AudioControl PNW-525

150W Peak (100W RMS) 5.25″ PNW Series 2-way 3-ohm Coaxial Car Speakers

• 75 watts Peak Each, 50 watts RMS Each
• Hybrid Silk Dome tweeters
• Rigid Poly Mica cone material
• Impedance: 3 ohm
• Sensitivity: 88.41 dB

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

VIP Product Get $23.90 in rewards to spend later

install icon

Install kits available for most vehicles

additional information required
Fits select locations in your GLC.
Add vehicle details to confirm exact location.
1
List price $259.00
-8% $239.00 /pair

Available

Ships in 10-14 days

Add to Cart
See all 12 special offers
Limited time!

Infinity REF407F (INFSPKRF407FUS)

210W Peak (75W RMS) 4" Reference Series 2-Way Coaxial 3-ohm Speakers

REF407F big
Go to item page Right Arrow Icon of Right Arrow

Infinity REF407F (INFSPKRF407FUS)

210W Peak (75W RMS) 4" Reference Series 2-Way Coaxial 3-ohm Speakers

• 105 watts Peak Each, 35 watts RMS Each
• 1/2" Textile 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 $8.80 in rewards to spend later

install icon

Install kits available for most vehicles

additional information required
Fits select locations in your GLC.
Add vehicle details to confirm exact location.
List price $139.95
Save $52.00
-37% $87.95 /pair

In stock

Add to Cart
See all 8 special offers

JBL GT7-5C (2-Pairs, 4-Total)

540W Peak (180W RMS) 5.25" 2-Way GT7-Series Component Speaker System (2-Pairs)

GT75C_2 big
Go to item page Right Arrow Icon of Right Arrow

JBL GT7-5C (2-Pairs, 4-Total)

540W Peak (180W RMS) 5.25" 2-Way GT7-Series Component Speaker System (2-Pairs)

• 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

Save 15% Off Package Deals at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.
additional information required
Fits select locations in your GLC.
Add vehicle details to confirm exact location.
3
List price $299.90
-20% $239.90

In stock

Only 1 Left!

Add to Cart

• 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

JL Audio C2-525 (Open Box, Great)

120W RMS 5.25" C2 Series 2-Way 4-ohm Component Speaker System

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

JL Audio C2-525 (Open Box, Great)

120W RMS 5.25" C2 Series 2-Way 4-ohm Component Speaker System

• 60 watts RMS Each
• 3/4" Silk Dome tweeters
• Mica Injected Polypropylene - MIPP cone material
• Impedance: 4 ohm
• Sensitivity: 89 dB

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

Install kits available for most vehicles

additional information required
Fits select locations in your GLC.
Add vehicle details to confirm exact location.
List price $329.99
-30% $230.99 /set

In stock

Only 1 Left!

Add to Cart

• 60 watts RMS Each
• 3/4" Silk Dome tweeters
• Mica Injected Polypropylene - MIPP cone material
• Impedance: 4 ohm
• Sensitivity: 89 dB

Kicker DSC50 (43DSC504)

400W Peak (100W RMS) 5.25" DS Series 2-way 4-ohm Coaxial Car Speakers (DSC504)

43DSC504 big
Go to item page Right Arrow Icon of Right Arrow

Kicker DSC50 (43DSC504)

400W Peak (100W RMS) 5.25" DS Series 2-way 4-ohm Coaxial Car Speakers (DSC504)

• 200 watts Peak Each, 50 watts RMS Each
• 1/2" PEI (Polyetherimide) Balanced Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 90 dB

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

Install kits available for most vehicles

additional information required
Fits select locations in your GLC.
Add vehicle details to confirm exact location.
59
List price $84.99
-12% $74.99 /pair

In stock

Add to Cart
See all 12 special offers

Kicker CSC5 (46CSC54)

450W Peak (150W RMS) 5.25” CS Series 2 Way Coaxial 4-ohm Speakers

46CSC54 big
Go to item page Right Arrow Icon of Right Arrow

Kicker CSC5 (46CSC54)

450W Peak (150W RMS) 5.25” CS Series 2 Way Coaxial 4-ohm Speakers

• 225 watts Peak Each, 75 watts RMS Each
• 1/2" PEI (Polyetherimide) Balanced Dome tweeters with neodymium magnets
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 90 dB

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

Install kits available for most vehicles

additional information required
Fits select locations in your GLC.
Add vehicle details to confirm exact location.
15
List price $119.99
-17% $99.99 /pair

In stock

Add to Cart
Used from: $69.99 Like New from: $84.99
See all 12 special offers
Limited time!

JL Audio C1-400x

70W RMS 4" C1 Series 2 Way Coaxial 4-ohm Car Speakers

C1-400x big
Go to item page Right Arrow Icon of Right Arrow

JL Audio C1-400x

70W RMS 4" C1 Series 2 Way Coaxial 4-ohm Car Speakers

• 35 watts RMS Each
• 3/4" Silk-Suspended Aluminum Edge Driven Dome tweeters
• Mineral-Filled Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 84.5 dB

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

VIP Product Get $9.50 in rewards to spend later

install icon

Install kits available for most vehicles

additional information required
Fits select locations in your GLC.
Add vehicle details to confirm exact location.
8
$94.99 /pair

In stock

Add to Cart
Used from: $53.99
See all 8 special offers

NVX VSP525KIT

750W Peak (250W RMS) 5.25" V-Series 2 Way Component Car Speakers

VSP525KIT big
Go to item page Right Arrow Icon of Right Arrow

NVX VSP525KIT

750W Peak (250W RMS) 5.25" V-Series 2 Way Component Car Speakers

• 375 watts Peak Each, 125 watts RMS Each
• 1" Silk Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 86 dB
• Mounting Depth: 2.04"

2+ offers available
shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $10.00 in rewards to spend later

install icon

Install kits available for most vehicles

additional information required
Fits select locations in your GLC.
Add vehicle details to confirm exact location.
27
List price $119.99
-17% $99.99 /set

In stock

Add to Cart
Continue to cart
Available Offers (2) for NVX VSP525KIT
Free Speaker Accessory at Checkout!
Add both to cart
Purchase $400 or More of NVX and Save 15%!
Add to cart
2026-07-27 11:08:20
See all 12 special offers
Limited time!

Pioneer TS-G1320S

500W Peak (70W RMS) 5.25" G-Series 2-way 4-ohm Coaxial Car Speakers

TS-G1320S big
Go to item page Right Arrow Icon of Right Arrow

Pioneer TS-G1320S

500W Peak (70W RMS) 5.25" G-Series 2-way 4-ohm Coaxial Car Speakers

• 250 watts Peak Each, 35 watts RMS Each
• 1-3/16" Polyethylene Terephthalate (PET) Balanced Dome tweeters
• Mica Injected Polypropylene - MIPP cone material with Progressive Flex Suspension System (PFSS) spider
• Impedance: 4 ohm
• Sensitivity: 87 dB

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

Install kits available for most vehicles

additional information required
Fits select locations in your GLC.
Add vehicle details to confirm exact location.
34
List price $65.00
Save 31%
-31% $44.99 /pair

In stock

Add to Cart
Used from: $39.99
See all 12 special offers

AudioControl PNW-525 with Sound Damping

150W Peak (100W RMS) 5.25″ PNW Series 2-way 3-ohm Coaxial Speakers + NVX SDSK2 Sound Damping

PNW525_SDSK2 big
Go to item page Right Arrow Icon of Right Arrow

AudioControl PNW-525 with Sound Damping

150W Peak (100W RMS) 5.25″ PNW Series 2-way 3-ohm Coaxial Speakers + NVX SDSK2 Sound Damping

• 75 watts Peak Each, 50 watts RMS Each
• 1" Silk Dome Tweeters
• Rigid Poly Mica cone material
• Impedance: 3 ohm
• Sensitivity: 84 dB

Save 15% Off Package Deals at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.
additional information required
Fits select locations in your GLC.
Add vehicle details to confirm exact location.
49
List price $277.74
-9% $253.99

Available

Ships in 10-14 days

Add to Cart

• 75 watts Peak Each, 50 watts RMS Each
• 1" Silk Dome Tweeters
• Rigid Poly Mica cone material
• Impedance: 3 ohm
• Sensitivity: 84 dB

Limited time!

Kicker KSC4 (51KSC404)

300W Peak (150W RMS) 4" KS Series 2 Way Coaxial 4-ohm Speakers

51KSC404 big
Go to item page Right Arrow Icon of Right Arrow

Kicker KSC4 (51KSC404)

300W Peak (150W RMS) 4" KS Series 2 Way Coaxial 4-ohm Speakers

• 150 watts Peak Each, 75 watts RMS Each
• 1/2" Silk Balanced 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.
install icon

Install kits available for most vehicles

additional information required
Fits select locations in your GLC.
Add vehicle details to confirm exact location.
3
List price $119.99
-17% $99.99 /pair

In stock

Add to Cart
See all 8 special offers

NVX VSP525

480W Peak (160W RMS) 5.25" V-Series 2 Way Coaxial Car Speakers

VSP525 big
Go to item page Right Arrow Icon of Right Arrow

NVX VSP525

480W Peak (160W RMS) 5.25" V-Series 2 Way Coaxial Car Speakers

• 240 watts Peak Each, 80 watts RMS Each
• 1" Silk Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB
• Mounting Depth: 2.16"

2+ offers available
shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $8.00 in rewards to spend later

install icon

Install kits available for most vehicles

additional information required
Fits select locations in your GLC.
Add vehicle details to confirm exact location.
23
List price $95.99
-17% $79.99 /pair

In stock

Add to Cart
Continue to cart
Available Offers (2) for NVX VSP525
Free Speaker Accessory at Checkout!
Add both to cart
Purchase $400 or More of NVX and Save 15%!
Add to cart
2026-07-27 11:08:20
See all 12 special offers

JBL Stadium 52CF (Open Box, Great)

480W Peak (160W RMS) 5.25" Stadium Series 2-way Component 3-ohm Speakers

Stadium 52CF big
Go to item page Right Arrow Icon of Right Arrow

JBL Stadium 52CF (Open Box, Great)

480W Peak (160W RMS) 5.25" Stadium Series 2-way Component 3-ohm Speakers

• 240 watts Peak Each, 80 watts RMS Each
• 3/4" Aluminum Edge-driven Dome tweeters
• Glass Fiber Plus One cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

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

Install kits available for most vehicles

additional information required
Fits select locations in your GLC.
Add vehicle details to confirm exact location.
List price $479.95
-34% $314.97 /set

In stock

Only 1 Left!

Add to Cart

• 240 watts Peak Each, 80 watts RMS Each
• 3/4" Aluminum Edge-driven Dome tweeters
• Glass Fiber Plus One cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

Limited time!

Polk Audio DB522 (DB 522)

600W Peak (200W RMS) 5.25" DB+ Series 2 Way Coaxial 4-ohm Car, Marine and Powersports Speakers

DB522 big
Go to item page Right Arrow Icon of Right Arrow

Polk Audio DB522 (DB 522)

600W Peak (200W RMS) 5.25" DB+ Series 2 Way Coaxial 4-ohm Car, Marine and Powersports Speakers

• 300 watts Peak Each, 100 watts RMS Each
• 3/4" Silk Dome tweeters
• UV-tolerant Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 91 dB

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

Install kits available for most vehicles

additional information required
Fits select locations in your GLC.
Add vehicle details to confirm exact location.
68
List price $109.99
-9% $100.00 /pair

In stock

Add to Cart
See all 12 special offers
NVX - Worth the Envy - Direct to Consumer Car Audio
1 2 3 4 5 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?
    FAQ for Speakers in 1978 GLC

    Q: Can I upgrade or change the Speakers in 1978 Mazda GLC?

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

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

    1978 Mazda GLC

    2008 Subaru Outback

    2019 Volvo S90

    2015 Subaru Forester

    2003 Acura RSX

    2004 Isuzu Axiom

    1985 Pontiac Formula

    2022 Ford Explorer Hybrid

    1977 Saab 99

    2017 BMW 7 Series

    Vehicle
    Store     Delete

    1988 BMW K100RT

    2002 Harley Davidson FXSTD Softail Deuce

    2019 Harley Davidson FLHT Electra Glide Standard

    1950 Harley Davidson E

    Vehicle
    Store     Delete

    2015 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

    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 1978 GLC
    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