Garage
Shop
Account Icon
Account
Box Icon
Track
order
Telephone Icon
Call
Help Icon
Help
Door with Arrow Icon
Sign In
  1. Home
  2. Closeout
  3. Car Audio & Electronics Closeout
  4. Car Speakers Closeout
  5. 5.25" Speakers Closeout
  6. Infinity INFSPKPR503F

See all parts that fit your 2003 Protege5

Infinity Primus 503F (INFSPKPR503F) (Open Box, Great)

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

Infinity
Shop all Infinity
highlight-star-icon

• 120 watts Peak Each, 40 watts RMS Each
• 1/2" Silk Edge Driven Dome tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 91 dB

Learn more about the ls-pr503f-u8

We apologize

This item has been discontinued

Show me more products from this category
Go to Category
NVX - Worth the Envy - Direct to Consumer Car Audio

Description

Infinity brand icon

Authorized dealer

Item Condition - Open Box, Great:

This product works like new, is well-cared-for and in great condition. May show limited signs of wear or use and may be missing non-essential parts, accessories or original packaging.

Product Details:

  • 5-1/4" Primus Series 2-way Coaxial Car Speakers
  • Power Handling:
    • Peak: 240 watts per pair / 120 watts each
    • RMS: 80 watts per pair / 40 watts each
  • Polypropylene cone material
  • Hi-Roll Rubber speaker surround
  • 1/2" Silk Edge Driven Dome tweeters
  • Ferrite magnet motor structure
  • Top-mount Depth: 1-13/16"
  • Cutout Dimensions: 5-1/8"
  • Impedance: 3 ohm
  • Frequency Response: 75 - 20000 Hz
  • Sensitivity: 91 dB
  • Authorized Internet Dealer
  • MFR #: INFSPKPR503F
  • 1-year Manufacturer's Warranty

    • Priced Per Pair

Specifications & Details

Speaker Specifications
Series
Primus Series
Priced Per
Pair
Number of Speakers
2
Speaker Size
5-1/4"
Design
2-way Coaxial
Tweeter Design
Edge Driven Dome
Tweeter Size
1/2"
Tweeter Composition
Silk
Woofer Composition
Polypropylene
Woofer Surround
Hi-Roll Rubber
Peak Power Handling
120 watts
RMS Power Handling
40 watts
Total PEAK Per Pair/Set
240 watts
Total RMS Per Pair/Set
80 watts
Sensitivity
91 dB
Frequency Response
75 - 20000 Hz
Impedance (Per Voice Coil)
3 ohm
Shallow Mount Installation
No
Magnet Type
Ferrite
Top-Mount Depth (Mounting Depth)
1-13/16"
Bottom-Mount Depth
2-1/8"
Cutout Dimensions
5-1/8"
CTA-2031 Compliant
No
General specifications
Marine Certified
No
Hi-Res Certified
No
Color
Black
Illumination
None
Speaker Grilles
No
Includes Damping Kit
without Damping Kit
Compatible vehicle types
Car/Truck/SUV/Van
What is in the box?
Paperwork
User manual
WITB: Speakers
Foam Gasket
Speakers (2)
Mounting screws (8)
Mounting clips (8)
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details

Manufacturer:

Infinity

Model Number:

INFSPKPR503F

Weight:

2.45lbs

Internal SKU:

ls-pr503f-u8

Internal Product ID:

221129

Customer Ratings & Reviews

Infinity Primus 503F (INFSPKPR503F) (Open Box, Great) thumbnail image
5 star
0%
4 star
0%
3 star
0%
2 star
0%
1 star
0%
Durability
0
Value
0
Features
0
Design
0
Usability
0

Customer Reviews

Sort by:
Loading...
Sorry, no reviews found
SDBSK2 main

NVX SDBSK2 1.38 Square Feet Damping Kit

Eliminates speaker panel distortion and reduces vibration, rattles, and squeaks!

(48)

$14.99

List price $18.74

Add to cart
SDBPRO20 main

NVX SDBPRO20 20 Square Feet Damping Kit

Eliminates speaker panel distortion and reduces vibration, rattles, and squeaks! (4.5mm Thick)

(4)

$109.99

List price $143.99

Add to cart
SDBBP40 main

NVX SDBBP40 36 Square Feet Damping Kit

Eliminates speaker panel distortion and reduces vibration, rattles, and squeaks! (91mil Thick)

(39)

$114.99

List price $131.99

Add to cart
SDDK12 main

NVX SDDK12 4-Door Kit

Eliminates speaker panel distortion and reduces door vibration, rattles and squeaks!

(51)

$39.99

List price $47.99

Add to cart
10415 main

Dynamat Damping Kit

Enough sound dampening for 2 speakers!

(24)

$25.95

List price $31.19

Add to cart
RKXSK main

Stinger Roadkill Speaker Kit

Use this to eliminate rattle from your speakers!

(12)

$18.99

List price $49.00

Add to cart
SDRLR1 main

NVX SDRLR1 Sound Damping Rubber Roller

Universal Professional Heavy Duty Roller for Sound Damping

(127)

$10.99

List price $13.99

Add to cart
SDRLR2 main

NVX SDRLR2 Sound Damping Rubber Roller

Universal Professional Heavy Duty Roller for Sound Damping

(19)

$11.99

List price $14.99

Add to cart
BTK106 main

Belva BTK106 Trim Panel Remover

Six Piece Professional-Grade Installer Panel Removal Tool Kit for Car Stereo/Speakers

(46)

$14.99

List price $19.99

Add to cart
BTK105 main

Belva BTK105 Trim Panel Remover

Five Piece Professional-Grade Installer Panel Removal Tool Kit for Car Stereo/Speakers

(73)

$11.99

List price $18.99

Add to cart
BAMMD3 main

Belva BAMMD3

Nine Function Digital Multimeter

(7)

$9.99

List price $29.99

Add to cart
10C102 small

Kicker C102 (10C102)

150W 10" Comp Series Single 2 ohm Subwoofer

(3)

$51.95

List price $119.95

XW1850BL small

NVX XW1850BL

50 ft 18-Gauge EnvyFlex True Spec Oxygen-Free Copper Remote Wire (Blue)

(19)

$11.99

List price $19.98

No picture

Infinity Kappa 53XF (INFSPKKA53XFAM) (Like New (Open Box))

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

$161.46

List price $239.95

CV140RED small

Coby CV140RED Red Jammerz DJ Style Headphone and Earbud Combo

DJ Style On-Ear Headphones and In-Ear Earbuds Combo

$8.95

List price $12.99

Related Searches

› Infinity › Infinity 5.25" Speakers › 5.25" Speakers under $100
Save up to 10 different vehicles in your garage
Vehicle
Store Delete

2003 Mazda Protege5

2002 Mitsubishi Eclipse Spyder

2021 Audi Q3

2003 Saab 9-3

2001 BMW 540i

2017 Ford Escape

2022 Kia K5

1981 Cadillac DeVille

2011 Infiniti FX50

1954 Chrysler Windsor

Vehicle
Store Delete

2014 Suzuki SFV650

Vehicle
Store Delete

2018 Can-Am Defender MAX HD8

2017 Can-Am Defender XT HD8

2018 Can-Am Defender HD8

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

Cancel

Shop your 2003 Protege5
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.
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