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Infinity Primus 603CF

Model #: PR603CF

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Additional Parts May Be Required:
Additional parts or labor may be required to complete the installation depending on year make and model

Available In Store Only


Professional Installation Required

Built to order, Usually Ships in 2-4 Weeks

Special Order
Usually Ships in 2-4 Weeks

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Primus Series 6-1/2″ component speaker system




Primus does you right

Infinity knows what music should sound like in the car, and their Primus PR603CF 6-1/2″ 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.

Grilles are not included; the factory grilles should be suitable for most applications.

Product highlights:

  • component speaker system includes 2 woofers, 2 tweeters, and 2 external crossovers
  • 6-1/2″ 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 60 watts RMS (180 watts peak power)
  • frequency response: 55-20,000 Hz
  • sensitivity: 92 dB at 2.83 volts
  • grilles not included
  • warranty: 1 year
  • 60-day returns

Additional information



Rms power handling (watts)

Frequency response


What's in the box

Owner's Manual, 2 Woofers, 2 Tweeters (each has attached 6" speaker leads with male quick-slides), Two 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


1 Year

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