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Infinity Reference 9633cf

6"x9" 3-way car speakers

7 Reviews

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Item # 1089633CF

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Our take on the Infinity Reference 9633cf

Rely on Infinity to revitalize the sound in your car. Replace your tired-out, old factory speakers with Reference Series full-range speakers that'll play your music louder and better.

A wider range

Rely on Infinity to revitalize the sound in your car. Replace your tired-out, old factory speakers with Reference Series full-range speakers that'll play your music louder and better.

Infinity Reference 9633cf 6"x9" speakers feature a Plus One+ woofer design that maximizes cone surface area so you enjoy richer, deeper lows. Textile dome midranges and tweeters project the mids and highs with precision, covering the entire musical frequency spectrum for true-to-life reproduction of vocals and instrumentals. Large voice coils in the tweeters allow for high power-handling. Grilles are not included — factory grilles are appropriate for most installations, but optional grilles are available.

Important Note: These Infinity Reference speakers use a low impedance design to pull more power safely from your car stereo or amplifier. This design is compatible with virtually all factory and aftermarket stereos.

Installation Note: These Infinity speakers do not include screws or speed clips. You may be able to use the factory screws to install them, but it's always a good idea to have an assortment of self-tapping screws (5/8" to 1") and speed-clips on hand.

Priced per pair

Product Highlights:

  • 6"x9" 3-way speakers (pair)
  • Plus One+ Injection-Molded Polypropylene (IMPP) woofer cone with hi-roll rubber surround
  • edge-driven textile dome tweeter and textile dome midrange
  • True Four Ohm Impedance technology: speaker's 2-ohm impedance combines with speaker wire impedance for a 4-ohm load
  • compatible with virtually all factory or aftermarket car stereos
  • optional grilles available
  • power range: 2-100 watts RMS (300 watts peak power)
  • frequency response: 46-30,000 Hz
  • sensitivity: 94 dB
  • top-mount depth: 3-1/16"
  • warranty: 1 year
  • Our 60-day money-back guarantee

Added to back deck of 69 camaro without an amp and I am very happy. Nice and clear sound.

69 Camaro, alpine deck, SLC Utah

What's in the Box:

  • Two 6x9" 3-way speakers
  • 2 Bottom-mount brackets
  • 2 Adhesive backed foam strips
  • Instructions
  • Warranty information
  • Infinity logo sticker

Featured Video:


Infinity Reference 9633cf Reviews

Average Customer Review(s):

(7 Reviews)

Very happy and impressive sound

69 Camaro, alpine deck from SLC Utah on 9/5/2015

1969 Chevrolet Camaro
Crutchfield Customer Review (What's this?)

Added to back deck of 69 camaro without an amp and I am very happy. Nice and clear sound.

Pros: Great sound and great price. You get what you pay for. Infinity is a solid company with quality speakers.

Cons: None.

Infinity Reference 9633cf

Anonymous from Glen Carbon, IL on 11/21/2013

1996 Buick Century
Crutchfield Customer Review (What's this?)

great sound



Infinity Reference 9633cf

GARY A from MAUK,GA on 8/16/2013

1987 Ford F Series
Crutchfield Customer Review (What's this?)

Great sound

Pros: crisp clear sound

Cons: none

Infinity Reference 9633cf

Anonymous from jackson ms on 7/9/2013

2009 Dodge Ram 1500
Crutchfield Customer Review (What's this?)

great speakers, loud and clear. just what i was looking for. i must also say, tech service was great. called just before they closed on a saturday and i didn't even have to wait. very knowledgable as well

Pros: well made, great sound

Cons: none

great product and the bass is the best

yaris from ny on 6/2/2012

i have a 2008 toyota yaris i replaced my head unit, after i did that the speakers sounded much better. i recently hooked up a amp and they make the car vibrate. the highs and lows are heard verry well and the bass kicks, well worth the price.

Pros: quality and clean sound at high volume

Cons: none


Anonymous from Tucson,AZ on 1/31/2012

I was a little confused before buying but anyhow I made my mind and bought these. Now listen , WOOOOOOOOOOOOOOOOOOOOOOOOOOOooooooooooo these are dynamites... Man just gor for them with eyes closed ..Superb Loud tight hard deep clear sound. I can bet on these speakers.I am Happy to have these.


Cons: Can't Find any..

Fantastic speakers, very clear sound

Wesley from Columbus, OH on 10/6/2009

1999 Saab 9-3
Crutchfield Customer Review (What's this?)

I purchased these to replace the stock speakers in my 1999 Saab 9-3. The Crutchfield website stated that they wouldn't fit, but I managed to get them to fit using the included spacer ring. I went out and purchased some different metal screws, however, as the screws included weren't long enough for my needs (not a problem since it was a somewhat custom installation at that point). I also soldered wires to the speakers instead of using faston (blade) connectors, which these speakers use. I don't plan on moving them anytime soon, so not a problem. I'm powering these with an Alpine 300 watt 4-channel amplifier, and they sound fantastic. The 3-way system is definitely noticeable -- the woofer is pretty powerful (especially with both speakers installed) for a 6x9", and the mid-range and tweeter speakers make for a very clean sound of voice as well as instruments. The only complaint I have about the speakers is the fact that the screw holes are extremely close to the rubber surround -- first trying one of the stock screws (not the ones I later purchased!) the screw managed to catch some of the surround's glue and rip a bit of the glue out. I added a drop of gorilla glue and that fixed it.




Hands-on research

Features and Specs

Speaker Size
Design 3-way
Tweeter Design 0.75" Super Tweeter
Impedance (Ohms) 2
Tweeter Composition UHF
Woofer Composition IMPP
Woofer Surround Hi-roll rubber
Parts Warranty 1 Year
Labor Warranty 1 Year
Sensitivity (1W at 1 meter) N/A
Sensitivity at 2.83 volts 94
Frequency Response 46 - 30k Hz
Minimum RMS Wattage 2
Maximum RMS Wattage 100
Peak Power Handling (Watts) 300
Top-mount Depth (Inches) 3
Bottom-mount Depth (Inches) 3 5/8
Cutout Diameter or Length (inches) 0

Product Research


Plus One+ Woofer Cones: Each speaker uses a cone significantly larger 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 a significant increase in efficiency.

Woofer Materials: Each woofer is constructed from Injection-Molded Polypropylene. This process of cone molding assures a uniform cone thickness for superior linearity and clarity. It is also lighter weight and more rigid for decreased distortion and improved bass response.

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.

Textile Dome Midrange and Super-Tweeter: Each speaker uses an edge-driven textile dome midrange and a UHF super-tweeter for smooth, accurate highs. A switch on the front of the tweeter housing allows you to boost the tweeter output 3dB, useful if the speakers are mounted in a location where high frequencies are easily absorbed.

Mounting: Infinity's mounting system allows the 6932cf speakers to fit in top-mount and bottom-mount 6"x9" applications.

Optional Grilles: The speakers do not come with any grilles. Optional grilles (108REF9633) can be purchased separately.

True Four Ohm Impedance Technology: The speaker's 2.0-ohm impedance combined with the impedance of your speaker wire provides a true 4-ohm load to your connected headunit or amplifier.

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.