Infinity PR9603IS 6x9" 3-way Coaxial Speaker System

Model: PR9603IS UPC: 050667368463 Item: 161158

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104 E Vine St.
Hatfield, PA 19440
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(866) 961-7781
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754 Route 309 (Bethlehem Pike)
Montgomeryville, PA 18936
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(215) 368-8343
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38 Greenfield Avenue,
Ardmore, PA 19003
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(610) 649-7002
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Product Information

PR9603IS Features:

True 4 ohm Architecture

Low impedance voice coils make the most of power from the amplifier for stronger, clearer sound.

Plus One™ Woofer Cones

Up to 35% more active radiating surface area creating powerful, accurate, exciting bass.

Vented Motor Assemblies

Motors run cooler for greater durability and less mechanical noise resulting in better bass response at low frequencies.

Plus One™ Woofer Cones

Harman’s patented (US patent #7,548,631) Plus One™ polypropylene cones provide more overall speaker-cone area than other cones in its class — the result is higher sensitivity, increased low-frequency output and greater musical character.

Edge-Driven Tweeters

Soft dome tweeters deliver a smooth high-frequency response and an increased power handling for highs and mids, which equates to more lifelike sound from vocals, cymbals, brass instruments and pianos.

Frequency Response Up to 21kHz

Hear what you’ve been missing — the Infinity Primus Series offers a frequency response that delivers the full-range response associated with exceptional sound.

Individually Voiced

For most brands, off-the-shelf speakers and a cursory approval of frequency response curves are good enough. That’s not the case with Infinity, the world’s top-selling car speaker brand. They don’t only listen to their speakers against the competition — they voice them against each other to ensure each line has the consistent Infinity sound signature car audio enthusiasts have come to know and love. This is just part of an extensive development process undertaken by some of the best transducer engineers in the world to provide the finest listening experience at any price point.

Two More Configurations to Fit Most Vehicles

The Infinity Primus Speaker Series are designed to fit most vehicle speaker openings without cutting or modification. Simply put, it’s the easiest way to boost your car’s sound performance.

Affordable Pricing

The Infinity Primus Series are all designed to give audio enthusiasts more boom for the buck — while they maintain a conservative price point, there is never a compromise in sound.

OEM-Level Reliability Testing

Infinity tests every speaker design to the same rigid specifications as the automakers, subjecting them to extreme conditions that would break lesser speakers. They freeze them, bake them, shake them, blast them with ultraviolet light and drive them at full power for days to make sure your audio investment lasts for years.


PR9603IS Specifications:

General Specifications

  • Power Handling (Continuous/Peak): 90W/360W
  • Recommended Amplifier Power Range: 5W-200W
  • Size: 6" x 9"

Audio Specifications

  • Frequency Response: 46Hz – 21kHz
  • Nominal Impedance: 3 Ohms
  • Sensitivity (2.83V/1m): 94dB
  • Speaker Specifications
  • Speaker Type: 6" x 9" Three-Way Loudspeaker


  • Height (in): 6-7/16"
  • Width (in): 9-5/16"
  • Depth (in): 3-13/32"
  • Mounting Height (in): 6-7/16"
  • Mounting Width (in): 8-7/8"
  • Mounting Depth (in): 2-21/32"

What's in the Box

What's in the Box

  • 2 PR9603IS 3-way speakers
  • 2 grilles with rings
  • 2 closed-cell foam woofer gaskets
  • Mounting hardware
  • Instruction manual


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