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Infinity Primus PR6510CS

6-1/2" component speaker system

Item # 108P6510CM

When the thrill of owning a new (or new-to-you) car wears off, there's one sure-fire way to bring the...

Read more from Crutchfield writer, Alexander H.

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About the Infinity Primus PR6510CS

Competitively priced components

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 PR6510cs 6-1/2" component speaker system 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?

Competitively priced components

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 PR6510cs 6-1/2" component speaker system 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.

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

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 included.

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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
  • edge-driven, textile dome tweeter
  • 2.7-ohm impedance for extra power (compatible with virtually all factory or aftermarket car stereos)
  • handles up to 80 watts RMS (240 watts peak power)
  • frequency response: 53-20,000 Hz
  • sensitivity: 88 dB at 2.83 volts
  • woofer top-mount depth: 2-1/16"
  • grilles included
  • warranty: 1 year
  • Our 60-day money-back guarantee
  • MFR # PR6510CSAM
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What's in the box:

  • 2 Woofers
  • 2 Tweeters (each has attached 6" speaker leads with male quick-slides)
  • 2 Woofer grilles
  • 2 Grille frames
  • 2 Woofer adapter brackets
  • 2 Crossovers
  • 2 Flush-mount cups
  • 2 Threaded flush-mount adapters
  • 2 Plastic locking nuts
  • 2 Surface-mount cups
  • 2 Starfish tweeter mounts
  • Four 1-3/8" Screws
  • Sixteen 1-1/8" Screws
  • Six 5/8" Flat head screws
  • 2 Washers
  • 2 Nuts
  • 8 Speed clips
  • 2 Adhesive backed foam gaskets
  • Template on box
  • Installation manual

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More details on the Infinity Primus PR6510CS

Features & specs

General
Speaker Size 6 1/2
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 53 - 20k Hz
Minimum RMS Wattage ---
Maximum RMS Wattage 80
Peak Power Handling (Watts) 240
Top-mount Depth (Inches) 2 1/16
Bottom-mount Depth (Inches) N/A
Cutout Diameter or Length (inches) 5 1/8

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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.

Mounting: Infinity markets these speakers as 6-1/2"; they will fit in standard 6-1/2" speaker openings (approximately 5" diameter), but they do not use the standard 6-1/2" speaker bolt pattern. In order to install them in standard 6-1/2" applications you must drill new screw holes. If new holes are drilled in the mounting surface of the car, no bracket is needed. If drilling in the car is not an option, the included brackets can be used, which have standard 6-1/2" mounting holes and the Ford non-symmetric four hole pattern. The brackets also offer several other non-standard hole patterns. When using the brackets the depth becomes 1.798" and the mounting height becomes 0.726". The speakers are easily installed in many standard 4-hole 6-3/4" applications with no modification. Enter your vehicle information to confirm fit.

Tweeter Mounting: The I-Mount tweeter mounting system and Starfish mounting brackets give you several different ways to mount the tweeters:

  • I-Mount Mounting System: The tweeters can be surface or flush mounted:
    • Surface Mount: Surface mounting the tweeters involves screwing the surface-mount cup to the mounting location, then inserting and locking the tweeter into the cup.
    • Flush Mount: Flush mounting is made easy through the use of the threaded flush-mount housing and plastic locking nut. Once a cutout is made, the tweeter is installed in the flush-mount adapter, then into the flush mount housing and inserted into the hole. The large plastic locking nut is threaded onto the adapter (from behind the mounting surface) to hold the complete assembly securely in place. When flush mounted, the tweeters may be angled for optimum response and imaging.
  • Starfish Mounting Brackets: The Starfish mounting brackets allow the tweeters to be installed in factory locations behind the grilles:
    • Bottom Mount: Once the Starfish bracket is trimmed, it is secured to the underside of the grille panel. The tweeter must be inserted into the bracket and locked into place before the bracket is mounted.
    • Surface Mount: Once the Starfish bracket is trimmed, it is screwed to the top of the mounting surface behind the grille panel. Then, the tweeter is inserted into the bracket and locked into place.
    • Flush Mount: There are two sets of tabs to flush mount the tweeter in the Starfish bracket, yielding different mounting dimensions. The upper tabs mount the tweeter completely below the opening and are glued in place. The lower mounting tabs are screwed in place and result in a mounting height just over 1/3 inch. Once the bracket is mounted, the tweeter is inserted into the bracket and locked into place.

Mounting Dimensions:

  I-Mount Surface Mount I-Mount Flush Mount Starfish Bottom Mount Starfish Surface Mount Starfish Flush Mount Starfish Flush Mount (below mounting surface)
Mounting Height 0.860" 0.632" 0.0" 0.843" 0.366" 0.0"
Depth 0.5" (screw depth) 0.804" 1.011" 0.5" (screw depth) 0.477" 0.94"
Frame Diameter 1.483" 1.843" 3.012" 2.444" 2.316" 3.012"
Cutout Diameter N/A 1.582" N/A N/A 1.508" 2.6"

Crossovers: The crossovers' inputs and outputs are screw terminals; they will accommodate bare wire or spade connectors up to 0.315" wide. There are two mounting holes in each crossover.

Crossover Dimensions:

  • Width: 2-1/8"
  • Height: 1"
  • Depth: 2-5/16"

Impedance: 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.

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