Infinity Primus 503CF Primus Series 5-1/4" component speaker system

Primus does you right

Infinity knows what music should sound like in the car, and their Primus PR503CF 5-1/4" component speaker system fits more vehicles than ever. Plus, new technology, like Infinity's cooling vented basket frame, ensures maximum output with less wear and tear over the life of these speakers.

Ditch the uninspired vocals, muddy cymbals, and flabby bass of your factory sound and experience what Infinity quality is all about. Smooth vocals, crisp cymbals, and rich bass await you.

Edge-driven tweeter design

Infinity employs an edge-driven design for an open sound and minimal distortion at high volume. Prepare for a more clearly defined soundstage as the natural details in your music come alive.

The included external crossovers are tuned to Infinity's exceptional standards so that you're treated to this system's best possible sound.

Famous Plus One+ technology

The Primus polypropylene woofer employs Infinity's proprietary Plus One woofer design for solid, punchy bass. Infinity extends the cone right up to the edge of the basket, for more 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 and clearer sound.

Product highlights:

- component speaker system includes 2 woofers, 2 tweeters, and 2 external crossovers

- 5-1/4" Plus One+ polypropylene woofer cone with hi-roll rubber surround

- 3/4" edge-driven silk dome tweeter

- 3-ohm impedance for extra power (compatible with virtually all factory or aftermarket car stereos)

- handles up to 50 watts RMS (150 watts peak power)

- frequency response: 75-20,000 Hz

- sensitivity: 91 dB at 2.83 volts

- grilles not included

- warranty: 18 months

What's in the box:

Infinity Primus 503CF owner's manual

What is in the box:

- 2 Woofers

- 2 Tweeters (each has attached 6" speaker leads with male quick-slides)

2 x 18" Tweeter wires with in-line crossovers

- 2 Threaded tweeter flush-mount cups

- 2 Plastic locking nuts

- 2 Surface-mount cups

- 2 Starfish tweeter mounts

- Eight 1" Pan head screws

- Six 5/8" Flat head screws

- 8 Speed clips

- 2 Adhesive backed foam gaskets

- Template and specs on box