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Infinity Reference REF-9630cx

Reference Series 6"x9" component speaker system

Item # 108R9630CM

One thing's for sure — our customers love Infinity's Reference Series speakers.

Find what Fits your vehicle

One thing's for sure — our customers love Infinity's Reference Series speakers.

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Contact our Virginia-based experts.

Item # 108R9630CM

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About the Infinity Reference REF-9630cx

Classic components

One thing's for sure — our customers love Infinity's Reference Series speakers. Year after year, car after car, options like this Reference Series REF-9630cx 6"x9" component speaker system remain a popular choice for replacing factory speakers because of their competitive pricing and superb sound.

Classic components

One thing's for sure — our customers love Infinity's Reference Series speakers. Year after year, car after car, options like this Reference Series REF-9630cx 6"x9" component speaker system remain a popular choice for replacing factory speakers because of their competitive pricing and superb sound.

Edge-driven dome tweeters

With this component system, you'll gain exceptional clarity and imaging, thanks to separate 3/4" edge-driven textile dome tweeters that subdue any harshness in the high-frequency range. Infinity includes external crossovers that give you push-button tweeter attenuation for a "brightness" quick fix.

Bigger woofers

The Reference Series polypropylene woofer with its durable hi-roll rubber surround ensures you'll enjoy powerful sound every mile you drive. Its oversized cone moves more air than other speakers of similar size, adding plenty of punch to the speaker's impressive performance.

Bring on the power

You can power these speakers with up to 125 watts of RMS power — they'll work well with an external amplifier, but they're also a good match for a factory radio or aftermarket stereo. Plus, these 3-ohm speakers combine with the speaker wire in your vehicle so your car stereo sees actual 4-ohm impedance, so you get a little more volume out of your system.


Product highlights:

  • component speaker system includes 2 woofers, 2 tweeters, and 2 crossovers
  • 6"x9" Plus One+ polypropylene woofer with hi-roll rubber surround
  • 3/4" edge-driven textile dome tweeter
  • Starfish™ mounting brackets for easier tweeter installation in factory locations
  • True Four Ohm Impedance technology
    • speaker's 3-ohm impedance combines with speaker wire impedance for a 4-ohm load
    • compatible with virtually all factory or aftermarket car stereos
  • tweeter adjustment circuits (0, +3 dB)
  • handles up to 125 watts RMS (375 watts peak power)
  • frequency response: 46-21,000 Hz
  • sensitivity: 93 dB
  • woofer mounting depth: 3-1/16
  • grilles included
  • warranty: 1 year
  • Our 60-day money-back guarantee
  • MFR # REF9630CXAM

What's in the box:

  • 2 Woofers
  • 2 Tweeters (each has attached 6" speaker leads)
  • 2 Woofer grilles
  • 2 Woofer grille frames
  • 2 Woofer bottom mount rings
  • 2 Crossovers
  • 2 Tweeter flush-mount housings
  • 2 Threaded flush-mount adapters
  • 2 Plastic locking nuts
  • 2 Tweeter surface-mount housings
  • 2 Starfish tweeter mounts
  • Eight 1-3/8" Screws
  • Eight 1-1/8" Screws
  • 8 Speed clips
  • Six 5/8" Flat head screws
  • 2 Washers
  • 2 Nuts
  • 2 Adhesive backed foam gaskets
  • 2 Infinity logos
  • Instruction manual
  • Template on box

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Crutchfield response

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More details on the Infinity Reference REF-9630cx

Pat M.

Features & specs

Speaker Size 6X9
Design 2-way
Tweeter Design 3/4" Edge-Driven Dome
Impedance (Ohms) 3
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 93
Frequency Response 46 - 21k Hz
Minimum RMS Wattage ---
Maximum RMS Wattage 125
Peak Power Handling (Watts) 375
Top-mount Depth (Inches) 3 1/8
Bottom-mount Depth (Inches) 3 11/16
Cutout Diameter or Length (inches) 0
Mounting Height (Inches) 0.382
The Infinity Reference REF-9630cx replaces these items:

Product Research



Plus One+ Woofer Cones: Each speaker uses a larger cone than other speakers of the same size. This is accomplished by using a unique basket design and hi-roll surround. The Plus One+ design offers greater bass output and an increase in efficiency.

Hi-roll Rubber Surrounds: The hi-roll rubber surrounds allow the woofers a greater range of movement, resulting in longer X-max and more bass output.


Material: Each tweeter features a 3/4" edge-driven textile dome for smooth, accurate highs.

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

  • I-Mount: The tweeters can be surface- or flush-mounted with Infinity's innovative I-Mount system:
    • 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 under a half inch. Once the bracket is mounted, the tweeter is inserted into the bracket and locked into place.


  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 0.854" 0.65" 0.0" 0.857" 0.386" 0.286"
Depth screw depth 0.786" 0.930" screw depth 0.471" 0.571"
Frame Diameter 1.474" 1.838" 3.036" 2.440" 2.330" 2.330"
Cutout Diameter N/A 1.581" N/A N/A 1.504" 1.257"


Selectable Tweeter Output Level: Each 2-way crossover allows you to select the tweeter output level according to system requirements and personal preference; the tweeter level can be set to +3 dB or 0 dB.

Connections: The crossover inputs and outputs are screw terminals; they will accommodate bare wire or spade connectors up to 0.31" wide. There are four mounting holes in each crossover.


  • Width: 4"
  • Height: 1-1/8"
  • Depth: 3-1/4" (plus wire)


High-Output Design: The 3Ω voice coil design compensates for the high in-line resistance of small gauge factory wiring, extracting more power from factory (or aftermarket) receivers. This results in clearer, richer sound for the listener.

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Customer Q&A

11 questions already asked

why is my components not playing there own frequencies?
[ CarnageMercs  Jun 15, 2021 ]
3 answers
I have had my components for just over a year,and I haven't had any problems out of mine...I didn't do the install myself,so the stereo shop tuned my crossovers and amp for can check the crossovers that come with the components
[ CHRIS  Jun 17, 2021 ]
They are playing the signal sent to them. Check your connections, as it sounds like possibly the subwoofer signal is going to the speakers,
[ Purple Griffon  Jun 15, 2021 ]
I'm a little unsure about your question. If you use the supplied crossover there will be some overlap in frequencies near the crossover point. The gradual fade is proper to ensure coherency. In other words, there won't be a defined point where the woofer and tweeter stop responding. Also, I experienced that there will be some break in time where the woofer becomes better with a little age. I suppose that's due to the woofer's spider becoming more pliable. So, don't quickly discount the bass quality, be patient. I hope this helps.
[ Henry Sutton  Jun 15, 2021 ]
Why do I hear vocals from my 6x9 woofer?
[ Anthony  May 13, 2021 ]
2 answers
You're lucky, I get buzz & static and mine are a few months old.
[ JAMES  May 13, 2021 ]
You will hear vocals they are midrange. Did you use the included crossovers?
[ Brandan  May 13, 2021 ]
Why do I hear vocals from my 6x9 woofer?
[ Anthony  May 13, 2021 ]
2 answers
do you have the cross-over wired properly? Are the vocals low sounds?
[ vwmann1  May 13, 2021 ]
You should... maybe. When you see a spec of a certain crossover point, it doesn't mean a complete cutoff frequency. There's a blending happening from the lows to highs, giving a more seamless aural experience. In other words, a more realistic rendition of the performance. The great thing about the Infinity system is that the woofer is low mass and nimble, never muddy and heavy. That makes the placement of drivers less critical for good sound. Not to be insulting, you may need to check the crossover wiring to ensure the tweeter and low haven't been inadvertently switched. Otherwise, enjoy.
[ Henry Sutton  May 13, 2021 ]
What amplifier do you recommend for these speakers?
[ Phill.R  Jan 01, 2021 ]
2 answers
Thanks for your question. For information on selecting the best amp 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 between the amp models and help you make the best choice for your system.
[ Krissy  Jan 15, 2021 ]  Staff
Sorry, didn't install an amplifier.
[ RICHARD  Jan 01, 2021 ]
When setting these up on a pioneer gm d1004 amp, what do I select on the amp 4ohm or 2ohm?
[ Jaime  Nov 17, 2020 ]
2 answers
I believe 4 ohm, I would suggest that you check the spec's on the speakers and/or ask crutchfield customer service
[ Sean  Nov 17, 2020 ]
[ JASON D  Nov 17, 2020 ]
Is an aftermarket amplifier required for these speakers? My Chevy cruze has a stock amp so would i just wire these in like the stock speakers?
[ Ian  Jun 19, 2020 ]
2 answers
You can use the factory amp
[ Michael  Jul 06, 2020 ]
no, it is not required, I replaced stock f150 speakers with these, the sound improved dramatically, sound is much, much cleaner, fuller and tighter than stock but these will not be any louder than your stock speakers. imho, you won't experience their full potential without adding an amp, the sound quality is amazing, improved by an order of magnitude after I added an lcq-1 and focal 4ch amp,
[ jrbarton  Jun 25, 2020 ]
What is the crossover frequency and slope?
[ Thomas  Sep 09, 2019 ]
1 answer
These specs are not released by Infinity, and therefore the included crossover should always be used with these components sets.
[ Calvin  Sep 18, 2019 ]  Staff

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Premium materials

The Infinity Kappa 90csx offers these features:
  • Plus One+ glass-fiber woofer cone with hi-roll rubber surround
  • edge-driven, soft dome tweeter
  • handles up to 135 watts RMS (405 watts peak power)