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Infinity Primus PR9610cs

6"x9" component speaker system

17 Reviews | 3 questions - 3 answers

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Item # 108P9610CS

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Our take on the Infinity Primus PR9610cs

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 PR9610cs 6"x9" 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 PR9610cs 6"x9" 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.

Product Highlights:

  • component speaker system includes 2 woofers, 2 tweeters, and 2 external crossovers
  • 6"x9" 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 100 watts RMS (300 watts peak power)
  • frequency response: 46-20,000 Hz
  • sensitivity: 89 dB at 2.83 volts
  • woofer top-mount depth: 3-1/8"
  • grilles included
  • warranty: 1 year
  • Our 60-day money-back guarantee

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 Bottom mount woofer 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
  • Eight 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

These speakers sound wonderful

Marc, Charleston, SC


Infinity Primus PR9610cs Reviews

Average Customer Review(s):

(17 Reviews)

Great sound,

Marc from Charleston, SC on 3/5/2019

2008 Toyota 4Runner
Crutchfield Customer Review (What's this?)

These speakers sound wonderful



Dodge Ram Bass Restored

Russ from Lakewood, WA on 2/19/2019

2009 Dodge Ram 3500
Crutchfield Customer Review (What's this?)

Sound great! I have a Dodge Ram with Infinity seven speaker sound system. Bought the truck with both front door base speakers blown. Because of the 2ohm requirement for the Infinity system, the choices were minimal in the 6"x9" 's. These fit the bill perfectly for ohms, fit and sound! As a bonus, I spliced the accompanying tweeters into the left and right dash speaker wires and found they add a very nice crisp range the three dash speakers lacked. THANK YOU CRUTCHFIELD!!

Pros: Easy Install because of fit and the free, provided wire adapters.

Cons: NONE

Infinity Primus PR9610cs

Crutchfield customer from Albemarle, NC on 2/18/2019

2018 Toyota Tacoma
Crutchfield Customer Review (What's this?)

These speakers are awesome! I put them with the stock stereo, but an amplifier is coming soon.



nice stock speaker upgrade if you need low ohm speakers

Crutchfield customer from San Diego, CA on 2/10/2019

2006 Toyota 4Runner
Crutchfield Customer Review (What's this?)

I Replaced stock JBL speakers in a 2006 Toyota 4runner limited with these. Same company as JBL but these after market are clearly made better in side by side comparison. the sound is better, plays louder and has more bass. I kept the stock amplifier. I had to manufacture a tweeter bracket and modify the supplied metra toyota harness that crutchfield included for free. . I was however able to use the speaker connector ends from the metra harness but not the plug end, it didnt match my vehicle.

Pros: good quality speakers at reasonable price

Cons: slight modifications needed. took 90 minutes to install. 1 hour on 1st speaker with trial and error of adapter and tweeter bracket. 2nd speaker was easy since i knew what to do

Infinity Primus 6x9

Axel from League City, TX on 2/10/2019

2012 Nissan Altima
Crutchfield Customer Review (What's this?)

Very good upgrade over my factory speakers. Infinity and Crutchfield are top notch!

Pros: Improved bass from a 6x9 speaker.

Cons: None yet

Infinity over Factory Alpine set!

Ruben from Winters, TX on 11/25/2018

2012 Dodge Charger
Crutchfield Customer Review (What's this?)

So far so good! Nice looking set of Infinitys for my wife's Charger. Rear set was easy to install but the front door panel set can be difficult because of all of the harnesses and door release cable!

Pros: Nice looking set! Sound great!

Cons: Not going to be able to run wire for tweeter placement up where I want it from the door! It can be done but it would have taken to long and torn up to much!!! Just going to run the tweets from the front dash 3.5s without the crossover when the new Infinity 300m's come in.

Infinity Primus PR9610cs

Crutchfield customer from Marion, NC on 9/27/2018

2018 Chevrolet Camaro
Crutchfield Customer Review (What's this?)

Awesome! Everything you would expect from Infinity!



They ROCK!!!

Mark from SAINT CLOUD on 9/3/2018

2005 Dodge Ram 1500
Crutchfield Customer Review (What's this?)

I bought these to replace my original factory speakers, I have the Infinity 7 speaker component system in a 2005 Dodge Ram 1500 truck. These things ROCK!!! I didn't need to use the crossover which makes installation so much easier.



Infinity Primus PR9610cs

Kevin from Kennewick, WA on 8/17/2018

Crutchfield Customer Review (What's this?)

Awesome sound without distortion. Great speaker for the money



Infinity Primus PR9610cs

Crutchfield customer from Middletown, OH on 6/24/2018

2007 Chevrolet Impala
Crutchfield Customer Review (What's this?)




Infinity Primus PR9610cs

Hyndrxx from Tampa, FL on 5/11/2018

2016 Chrysler 300
Crutchfield Customer Review (What's this?)

Nice sounding speaker. It fits right in the front door of my 16Chrysler 300s

Pros: Nice low sound even with out a amp.

Cons: None

just what i needed

Kyle from Naples, FL on 5/8/2018

2012 Chevrolet Camaro
Crutchfield Customer Review (What's this?)

AMAZING upgrade to the factory speakers. I also added the fronts and a K5 amp to really compliment the audio-gasm!!! i love my purchase. plus, the product was on my doorstep in 3 business days.

Pros: compact crossover size perfect fit amazing build quality

Cons: really?! there aren't any

Infinity Primus PR9610cs

Crutchfield customer from Bowling Green, KY on 4/19/2018

2004 Nissan Altima
Crutchfield Customer Review (What's this?)

The tweeters can handle the 80 watts easily that's going to them. The woofer though... Nope. Even on the crossover the woofers run into distortion and clip at the slightest on bass and volume. I listen mainly to rock music, not any reason for the bass to clip since I'm not playing music with just lows which would understandable if I was. Do yourself a favor and if you enjoy Infinity as a brand, but need more than just the very minimal of speaker. Step up to the next price point. I seriously think my factory 6x9 speakers are more robust. Which is a crying shame given the Infinity name! They would have received a 2 star rating if not for the amazing tweeter that does come in the package.

Pros: Cheaper set of components Great tweeter combo

Cons: Get what you pay for 6x9 woofer is far from the quality one comes to expect from a brand like infinity.

Infinity Primus PR9610cs

Richard from Bakersfield, CA on 4/16/2018

2018 Chevrolet Silverado 1500
Crutchfield Customer Review (What's this?)

Major improvement over the factory speakers in my 2018 Silverado, great bass and highs, will sound even better once hooked up to an amp but still sound great running off the factory stereo

Pros: Great clear clean sound!

Cons: None

Much improved sound quality with some punch!

Ron from Roanoke, VA on 4/13/2018

2011 Toyota Highlander
Crutchfield Customer Review (What's this?)

I only used the woofers for the door of my 2011 Highlander. I was a little bit worried about the 2.7 ohm impedance since the factory speakers are 2 ohm- 35% increase in impedance. But to my surprise, the performed great! Mid bass was clearer and actually a few dB louder than the factory. Frequency response was lower too. I chose the Primus because the Reference model was 3 ohm and I wanted the lowest impedance possible. Plus, the woofer doesn't produce any mods or highs so 2 or 3 way speakers were useless. I did have to use the spacer ring so that the magnet wouldn't hit the window. And because the speaker protruded further into the door, I trimmed the ring in the door by .5-.75 inches so that the speaker wouldn't hit that. In spite of the 35% increase in impedance, the speaker sounds great! It's high quality you would expect from Infinity!

Pros: Better mid base and punch over the paper cone factory speakers with the little magnet.

Cons: If only Infinity produced a 2 ohm 6x9 that was Kappa, Reference or Primus. I would have loved to have the sensitivity of a set of Kappas!

So Far So Good

Shawn from Waianae, HI on 4/2/2018

2017 Jeep Cherokee
Crutchfield Customer Review (What's this?)

I'm only using the woofer part of the set. I have them crossed at 1600hz. They seem to be really smooth and not as choppy as last year's primus set. 4 stars because I am only using the woofers without the tweeters or crossovers that came with the set.

Pros: Tight bass accurate bass.

Cons: None.

Infinity Primus PR9610cs

Crutchfield customer from Kansas City, MO on 3/19/2018

2018 Ford F-150 XLT
Crutchfield Customer Review (What's this?)

Much better audio than stock and Crutchfield adapters helped with installation.




Hands-on research

Features and Specs

Speaker Size 6X9
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
Sensitivity (1W at 1 meter) N/A
Sensitivity at 2.83 volts 89
Frequency Response 46 - 20k Hz
Minimum RMS Wattage ---
Maximum RMS Wattage 100
Peak Power Handling (Watts) 300
Top-mount Depth (Inches) 3 1/16
Bottom-mount Depth (Inches) 3 11/16
Cutout Diameter or Length (inches) 0

Product Research


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.

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.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

New year new products and reviews [ Kameron  Jan 27, 2019 ]
This particular set has the correct impedance to replace my factory BMW rear deck speakers. [ Juan  Nov 28, 2018 ]
price and described quality attributes [ Tim  Oct 18, 2018 ]
I needed replacement speakers and the "setup" from the Brand of vehicle has made it confusing and not as simple as just ordering speakers and plugging them in so I asked an adviser who assisted me in making my decision. [ Mark  Aug 21, 2018 ]
Cool [ Josh  Mar 26, 2018 ]
Seemed to fit the bill of for my current project. I will review once installed. [ SHAWN  Mar 20, 2018 ]
Upgrade factory components. [ Mark  Feb 20, 2018 ]
quality replacement for factory speakers that are low quality [ Robert  Jan 14, 2018 ]
Fits my '05 Altima SE-R rear deck [ JIHN  Dec 30, 2017 ]

3 questions already asked

Thanks for your question. For information on comparing two or more models I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They will be able to help determine the differences and help you make the best choice for your system and your budget. [ Krissy  Oct 22, 2018 ]  Staff
Typically the crossovers will be mounted in the door panels upon installation. For more specific details on that, please contact an Advisor directly by phone (888.955.6000) or online chat. They can go over any questions and/or concerns about the installation with you there. Thanks! :) [ Larry  Dec 09, 2017 ]  Staff