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

JBL STAGE1 51F (JBLSPKS151F)

300W Peak (60W RMS) 5.25" Stage Series 2 Way Coaxial 4-ohm Speakers

STAGE151F big
Go to item page Right Arrow Icon of Right Arrow

300W Peak (60W RMS) 5.25" Stage Series 2 Way Coaxial 4-ohm Speakers

• 150 watts Peak Each, 30 watts RMS Each
• Mylar Balanced 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.
install icon

Install kits available for most vehicles

found car based on your search
Fits the following location in your 928
  • Rear Seat Side Panel
List price $79.99
Save 38%
-38% $49.99 /pair

In stock

MTX TERMINATOR5

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

TERMINATOR5 big
Go to item page Right Arrow Icon of Right Arrow

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

• 70 watts Peak Each, 35 watts RMS Each
• Silk Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 85.3 dB

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

Install kits available for most vehicles

found car based on your search
Fits the following location in your 928
  • Rear Seat Side Panel
List price $69.95
-14% $59.95 /pair

In stock

Deaf Bonce Avatar MTU 50LE

280W Peak (140W RMS) 5.2" Tsunami Series Midrange 4-ohm Car Speakers

Avatar MTU 50LE big
Go to item page Right Arrow Icon of Right Arrow

280W Peak (140W RMS) 5.2" Tsunami Series Midrange 4-ohm Car Speakers

• 140 watts Peak Each, 70 watts RMS Each
• Pressed Paper cone material
• 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

found car based on your search
Fits the following location in your 928
  • Rear Seat Side Panel
$29.90 /pair

In stock

Only 1 Left!

Deaf Bonce Machete MM-50L

320W Peak (196W RMS) 5.2" Machete Series Midrange 4-ohm Speakers

MM-50L big
Go to item page Right Arrow Icon of Right Arrow

320W Peak (196W RMS) 5.2" Machete Series Midrange 4-ohm Speakers

• 160 watts Peak Each, 98 watts RMS Each
• Paper cone material
• Impedance: 4 ohm
• Sensitivity: 91.6 dB

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

Install kits available for most vehicles

found car based on your search
Fits the following location in your 928
  • Rear Seat Side Panel
1
$44.90 /pair

In stock

Limited time!

Alpine BRV-S40

240W Peak (80W RMS) 4" BassRev Series 4-ohm 2-Way Coaxial Speaker Set

BRV-S40 big
Go to item page Right Arrow Icon of Right Arrow

240W Peak (80W RMS) 4" BassRev Series 4-ohm 2-Way Coaxial Speaker Set

• 120 watts Peak Each, 40 watts RMS Each
• 1" Polyester cloth Dome Tweeters
• Polypropylene-Mica cone material
• BassRev tuning via Alpine OPTIM8
• Impedance: 4 ohm
• Sensitivity: 84 dB

Free Speaker Accessory at Checkout!
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

Install kits available for most vehicles

found car based on your search
Fits the following location in your 928
  • Side Panel
List price $300.00
Save $100.05
-33% $199.95 /pair

In stock

Limited time!

Infinity Primus 503F (INFSPKPR503F)

240W Peak (80W RMS) 5.25” Primus Series 2 Way Coaxial 3-ohm Speakers

Primus 503F big
Go to item page Right Arrow Icon of Right Arrow

240W Peak (80W RMS) 5.25” Primus Series 2 Way Coaxial 3-ohm Speakers

• 120 watts Peak Each, 40 watts RMS Each
• 1/2" 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.
install icon

Install kits available for most vehicles

found car based on your search
Fits the following location in your 928
  • Rear Seat Side Panel
List price $99.95
-30% $69.95 /pair

In stock

Only 3 Left!

Limited time!

Diamond Audio DMD52

160W Peak 5.25" DMD Series 2-way Coaxial Car Speakers

DMD52 big
Go to item page Right Arrow Icon of Right Arrow

160W Peak 5.25" DMD Series 2-way Coaxial Car Speakers

• 80 watts Peak Each
• 0.79" Silk Dome Tweeters
• Polypropylene cone material
• 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 $11.00 in rewards to spend later

install icon

Install kits available for most vehicles

found car based on your search
Fits the following location in your 928
  • Rear Seat Side Panel
List price $119.99
-8% $109.99 /pair

In stock

MB Quart PK1-113

220W Peak (110W RMS) 5.25" Premium Series 2-Way 4-ohm Coaxial Car Speakers

PK1-113 big
Go to item page Right Arrow Icon of Right Arrow

220W Peak (110W RMS) 5.25" Premium Series 2-Way 4-ohm Coaxial Car Speakers

• 110 watts Peak Each, 55 watts RMS Each
• 1" Magnesium Dome tweeters
• Tunable waveguide tweeter housing
• Pop Paper-Mica Blend cone material
• Curvilinear cone design geometry
• Impedance: 4 ohm
• Sensitivity: 85.9 dB

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

VIP Product Get $12.19 in rewards to spend later

install icon

Install kits available for most vehicles

found car based on your search
Fits the following location in your 928
  • Rear Seat Side Panel
List price $169.99
-28% $121.87 /pair

In stock

Limited time!

Diamond Audio DES525

200W Peak (100W RMS) 5.25" Elite Series 2-way 4-ohm Coaxial Car Speakers

DES525 big
Go to item page Right Arrow Icon of Right Arrow

200W Peak (100W RMS) 5.25" Elite Series 2-way 4-ohm Coaxial Car Speakers

• 100 watts Peak Each, 50 watts RMS Each
• 0.98" Aluminum Dome tweeters
• Composite Carbon Fiber cone material
• Impedance: 4 ohm
• Sensitivity: 85 dB

Free Speaker Accessory at Checkout!
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

Install kits available for most vehicles

found car based on your search
Fits the following location in your 928
  • Rear Seat Side Panel
$199.99 /pair

In stock

Only 1 Left!

Limited time!

Hertz CX 130

300W Peak (100W RMS) 5.25" Cento Series 2-Way Coaxial 4-ohm Car Speakers

CX 130 big
Go to item page Right Arrow Icon of Right Arrow

300W Peak (100W RMS) 5.25" Cento Series 2-Way Coaxial 4-ohm Car Speakers

• 150 watts Peak Each, 50 watts RMS Each
• 0.9" Tetolon Dome tweeters
• Semi-Pressed paper with Mica cone material
• Impedance: 4 ohm
• Sensitivity: 92.5 dB

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

VIP Product Get $25.00 in rewards to spend later

install icon

Install kits available for most vehicles

found car based on your search
Fits the following location in your 928
  • Rear Seat Side Panel
List price $260.00
$249.99 /pair

In stock

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

Install kits available for most vehicles

found car based on your search
Fits the following location in your 928
  • Front Door
3
$59.95 /pair

In stock.

Limited time!

Hifonics HCC525CX

160W Peak (80W RMS) 5.25" Colossus Classic Series 2 Way Coaxial 4-ohm Speakers

HCC525CX big
Go to item page Right Arrow Icon of Right Arrow

160W Peak (80W RMS) 5.25" Colossus Classic Series 2 Way Coaxial 4-ohm Speakers

• 80 watts Peak Each, 40 watts RMS Each
• 1" Aluminum Dome Tweeters
• Woven Fiber 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

found car based on your search
Fits the following location in your 928
  • Rear Seat Side Panel
$49.99 /pair

In stock

Rockford Fosgate Punch P152 (Open Box, Great)

160W Peak (80W RMS) 5.25" Punch Series 2-way 4-ohm Full Range Car Speakers

P152 big
Go to item page Right Arrow Icon of Right Arrow

160W Peak (80W RMS) 5.25" Punch Series 2-way 4-ohm Full Range Car Speakers

• 80 watts Peak Each, 40 watts RMS Each
• 3/4" PEI (Polyetherimide) Dome tweeters
• Mineral-Filled Polypropylene cone material
• 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

found car based on your search
Fits the following location in your 928
  • Rear Seat Side Panel
27
List price $109.99
-15% $93.49 /pair

In stock

Limited time!

Earthquake Sound VTEK-MC5

1000W RMS 5.25" VTEK Series 2-Way Component 4-ohm Car Speaker System

VTEK-MC5 big
Go to item page Right Arrow Icon of Right Arrow

1000W RMS 5.25" VTEK Series 2-Way Component 4-ohm Car Speaker System

• 500 watts RMS Each
• 1" Silk Dome Tweeters
• Electroplated Carbon Fiber 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.
VIP Star Icon

VIP Product Get $23.00 in rewards to spend later

install icon

Install kits available for most vehicles

found car based on your search
Fits the following location in your 928
  • Rear Seat Side Panel
List price $249.00
-8% $229.99 /set

In stock.

Rockford Fosgate P132 (Open Box, Great)

80W Peak (40W RMS) 3.5” Punch Series 2 Way Full Range Coaxial 4-ohm Speakers

P132 big
Go to item page Right Arrow Icon of Right Arrow

80W Peak (40W RMS) 3.5” Punch Series 2 Way Full Range Coaxial 4-ohm Speakers

• 40 watts Peak Each, 20 watts RMS Each
• 3/4" PEI (Polyetherimide) Dome tweeters
• Mineral-Filled Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 85 dB

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

Install kits available for most vehicles

found car based on your search
Fits the following location in your 928
  • Front Door
43
List price $89.99
-15% $76.49 /pair

In stock

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

Install kits available for most vehicles

found car based on your search
Fits the following location in your 928
  • Front Door
$89.99 /pair

In stock.

JBL GX428 (JBLGX428AM)

210W Peak (70W RMS) 4" GX Series 2 Way Coaxial 2.3-ohm Speakers

GX428 big
Go to item page Right Arrow Icon of Right Arrow

210W Peak (70W RMS) 4" GX Series 2 Way Coaxial 2.3-ohm Speakers

• 105 watts Peak Each, 35 watts RMS Each
• Soft Dome tweeters with deflector
• Polypropylene Plus One woofer cone material
• Impedance: 2.3 ohm
• Sensitivity: 90 dB

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

Install kits available for most vehicles

found car based on your search
Fits the following location in your 928
  • Side Panel
$64.95 /pair

Available

Ships in 10-14 days

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

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 $11.00 in rewards to spend later

install icon

Install kits available for most vehicles

found car based on your search
Fits the following location in your 928
  • Side Panel
List price $139.95
-21% $109.95 /pair

In stock

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

Install kits available for most vehicles

found car based on your search
Fits the following location in your 928
  • Front Door
$109.99 /pair

Available

Ships in 10-14 days

Limited time!

Pioneer TS-A1081F (Open Box, Great)

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

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

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

Install kits available for most vehicles

found car based on your search
Fits the following location in your 928
  • Side Panel
List price $110.00
-27% $80.00 /pair
$72.00 with coupon | Price details

In stock

Only 1 Left!

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 1981 928

    Q: Can I upgrade or change the Speakers in 1981 Porsche 928?

    A: Yes this page includes all the best Speakers that work in your 928.

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

    2004 Volvo XC70

    1981 Porsche 928

    2011 Toyota Tundra

    1976 Chevrolet Impala

    2009 Ford Mustang

    2005 Jeep Wrangler

    1995 Ford Ranger

    1978 GMC G25

    1992 Dodge Ram 50

    1978 Chevrolet Nova

    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.