About the Infinity Primus PR5012IS

Treat yourself to an upgrade
Treat yourself to an upgrade
When the thrill of owning a new (or new-to-you) car wears off, there's one sure-fire way to bring the excitement back to your drive. Install Infinity's Primus PR5012is 5-1/4" 2-way speakers in your doors and say goodbye to the uninspired vocals, muddy cymbals, and flabby bass of your factory sound. Lifelike vocals, crisp cymbals, and well-defined bass await you. What new playlists will you create to put these awesome speakers to the test?
Edge-driven tweeter design
Infinity employs an edge-driven design in their soft dome tweeters for a smoother, more open response and minimal distortion at high volume. Prepare for a more clearly defined soundstage as the details in your music come alive.
Famous Plus One+ technology
This Primus polypropylene woofer delivers solid, punchy bass, thanks to Infinity's proprietary Plus One+ woofer design. Infinity extends the cone right up to the edge of the basket, giving you lots of surface area — and a bigger cone means more bass when your music needs it.
Make the most of your power
Infinity's special "true 4-ohm architecture" uses a low-impedance voice coil to safely draw extra power out of your factory radio, aftermarket stereo, or an external amplifier, so you'll get a stronger clearer sound.
Grilles are not included; the factory grilles should be suitable for most applications.
Product highlights:
- 5-1/4" 2-way car speakers
- Plus One+ polypropylene woofer cone with hi-roll rubber surround
- edge-driven, textile dome tweeter
- 2.7-ohm impedance for extra power (compatible with virtually all factory or aftermarket car stereos)
- handles up to 40 watts RMS (120 watts peak power)
- frequency response: 67-20,000 Hz
- sensitivity: 88 dB at 2.83 volts
- top-mount depth: 1-15/16"
- grilles not included
- warranty: 1 year
- MFR # PR5012ISAM
What's in the box:
Infinity Primus PR5012IS owner's manual
- Two 2-way speakers
- 2 Adhesive backed foam gaskets
- Template on box
- Installation manual
Customer reviews for Infinity Primus PR5012IS
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Average review:
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More details on the Infinity Primus PR5012IS

Features & specs
General | ||
---|---|---|
Speaker Size | 5 1/4 | |
Design | 2-way | |
Tweeter Design | Edge-Driven Dome | |
Impedance (Ohms) | 2.7 | |
Tweeter Composition | Textile | |
Woofer Composition | Polypropylene | |
Woofer Surround | Rubber | |
Parts Warranty | 1 Year | |
Labor Warranty | 1 Year | |
Specifications | ||
Sensitivity (1W at 1 meter) | N/A | |
Sensitivity at 2.83 volts | 88 | |
Frequency Response | 67 - 20k Hz | |
Minimum RMS Wattage | --- | |
Maximum RMS Wattage | 40 | |
Peak Power Handling (Watts) | 120 | |
Top-mount Depth (Inches) | 1 15/16 | |
Bottom-mount Depth (Inches) | N/A | |
Cutout Diameter or Length (inches) | 4 7/16 | |
Mounting Height (Inches) | 0.411 |
Product Research
Features
Plus One Woofer Cones: The Plus One speaker cones offer more surface area than other speakers that fit in the same size opening. This is accomplished by using a new basket design and hi-roll surround. The result is greater bass output and an increase in efficiency.
Voice Coil: The Primus Series speakers feature 2.7Ω voice coils to compensate for the high in-line resistance of small gauge factory wiring and extract every watt from the factory receiver, increasing overall system output and efficiency (relative to 4-ohm speakers). The speakers also benefit from increased power when you upgrade the wire and add aftermarket amplifiers capable of powering a lower impedance load.
The Infinity Primus PR5012IS replaces these items

Infinity Primus PR5012is
- Plus One+ polypropylene woofer cone with hi-roll rubber surround
- edge-driven, textile dome tweeter
- handles up to 40 watts RMS (120 watts peak power)
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Customer Q&A
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Exactly what I needed. Crutchfields website made it super easy for me to select a replacement subwoofer for my blown JBLs and the price was good and they sound great! And they also made sure I had all the optional accessories to complete installation. Thank you.
Darin from Republic, MO