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Alpine SPS-406

Type-S 4"x6" 2-way car speakers

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  • Alpine SPS-406

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  • Alpine SPS-406
  • Alpine Type-S Car Speakers
  • Crutchfield video: Alpine Type-S Car Speakers
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Item# 500SPS406 offer details

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Alpine

Our take on the Alpine SPS-406

by Buck Pomerantz
Alpine Authorized Online Dealer

Alpine combines outstanding materials with superior construction to create their Type-S Series speakers. Upgrade your factory speakers with these Alpines, and they'll fill your vehicle with high-fidelity sound at a reasonable cost.

The SPS-406 4"x6" speakers use strong, lightweight polypropylene-mica woofers to handle the lower frequencies. Air-injected rubber surrounds keep cone movement under tight control, eliminating distortion and enhancing bass. Stamped steel frames provide rugged support for these speakers, and their low profile allows them to fit in more factory locations.

The 3/4" silk dome tweeters play your high notes smoothly and comfortably with no hint of harshness. You can also swivel the tweeters up to 10 degrees to improve the stereo image at your listening position. These efficient Type-S speakers will sound great with a low-powered factory radio, but they're also made to handle the high power output of an external amplifier. Grilles are not included — factory grilles are appropriate for most installations.

See more info on this item

Highlights:

  • 4"x6" 2-way speakers (pair)
  • polypropylene-mica woofer cone with air-injected rubber surround
  • 3/4" silk dome tweeter
  • power range: 2-45 watts RMS (140 watts peak power)
  • frequency response: 93-22,000 Hz
  • sensitivity: 87 dB
  • top-mount depth: 1-3/4"
  • warranty: 1 year
  • Our 60-day money-back guarantee
Shop all Alpine 4"x6" Speakers

    Priced per pair
    Note: Sorry, Crutchfield cannot ship Alpine products to Guam or Puerto Rico.

     

    Hands-on research from the Crutchfield Labs (what are the Labs?)

    Features and specs chart | What’s in the box? | In-depth notes

    Features and Specs

    Features and Specs
    General
    Design
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    		 2-way
    Tweeter Design
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    		 Dome
    Tweeter Composition
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    		 Silk
    Woofer Composition
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    		 Poly-mica
    Woofer Surround
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    		 Rubber
    Parts Warranty
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    		 1 Year
    Labor Warranty
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    		 1 Year
    Specifications
    Sensitivity
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    		 87 dB at 1 watt
    Frequency Response
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    		 93 - 22k Hz
    RMS Power Range (Watts)
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    		 2-45
    Peak Power Handling (Watts)
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    		 140
    Impedance (Ohms)
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    		 4
    Top-mount Depth (Inches)
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    		 1 3/4
    Bottom-mount Depth (Inches)
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    		 1 7/8

    Product Research

    Product Research
    What's in the box?

    Download owner's manual

    • Two 2-way 4x6" speakers
    • 2 Plastic metric-to-standard adapter rings (for top-mount applications)
    • 2 Metal metric-to-standard adapter rings (for bottom-mount applications)
    • 2 Plastic bottom-mount spacer rings
    • 2 Strips of self-adhesive foam
    • Two 12" lengths of speaker wire (each length of speaker wire has quick-slides on one end and bare wire on the other end)
    • Eight 13/16" self-tapping screws
    • Eight 5/8" self-tapping screws
    • Eight 1/4" self-tapping screws
    • 8 Machine screws
    • 8 Flat washers
    • 8 Speed clips
    • 8 Speed nuts
    • Warranty sheet
    • "Important Notice!" note

    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 open the box, verify contents, 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.

    Features

    Poly-Mica Cone: Each speaker features a Poly-Mica cone. Mica adds strength and heat resistance to polypropylene, resulting in reduced distortion and improved reliability.

    Air-injected Rubber Surrounds: For a smoother response and improved durability, the woofers use air-injected rubber surrounds.

    Silk Dome Tweeters: Each speaker has a 3/4" Wide-Range Silk Dome Tweeter for smooth high frequencies.

    Highly Efficient Design: The SPS-406's high-efficiency design allows the speaker to be run off of your factory or aftermarket head unit, resulting in an easy system improvement for many vehicles requiring a 4x6" speaker.

    Shallow-Design: The Alpine SPS-406 features a stamped steel shallow frame. This shallow mounting design allows for easier installation in a wide range of door panels giving you a perfect fit.

    Mounting: The speakers can be mounted in a metric 4x6" opening, or, using the supplied adapter rings, the speakers can be mounted in a U.S. standard 4x6" opening. The speakers also come with bottom mount spacer rings.

    No Grilles: No grilles are included with this speaker.

     

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    Reviews for the Alpine SPS-406

    Average Customer Review:

    21 people say:

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    Showing: 1-20 of 21
    View page: 12 »
    4 out of 5

    Alpine sps-406

    Written By Anonymous, Honeoye, ny on Thursday, February 28, 2013
    Installed in a 1993 Jeep Wrangler
    Crutchfield Customer Review (What's this?)
     
    Haven't had in my vehicle long but so far sounds good and install was easy
    Pros:
    Easy install and directions helped alot
    Cons:
    A lot of hardware to sort through to find the right screws to use
    Was this review helpful?    Yes | No
     
    4 out of 5

    Good speakers

    Written By Ashley, North Augusta, SC on Monday, December 24, 2012
    Installed in a 1989 Chevrolet C Series
    Crutchfield Customer Review (What's this?)
     
    Good speakers, but had to modify vehicle to get them to fit properly.
    Pros:
    Good speakers for the price and very fast shipping!
    Cons:
    Had to make some modifications to get them to fit properly
    2 out of 3 people found this helpful
    Was this review helpful?    Yes | No
     
    5 out of 5

    great sound quality

    Written By JarvisR, Whitewater WI on Monday, July 02, 2012
    Crutchfield Customer Review (What's this?)
     
    Sound quality is great and they pair well with my Alpine receiver.
    Pros:
    sound
    Was this review helpful?    Yes | No
     
    5 out of 5

    Sps-406 speakers

    Written By Rick, Iowa on Thursday, June 07, 2012
     
    These speakers are Awsome ! There is a guy on here said they only had high end tones. If they are wired wrong meaning positive and negative switched they will sound like this do to bass moves inward and not outward.
    Was this review helpful?    Yes | No
     
    3 out of 5

    A little too bright

    Written By clayr, wilmington, nc on Saturday, February 04, 2012
    Crutchfield Customer Review (What's this?)
     
    OK - as far as installation, no one beats Crutchfield - great directions, fast deliver, they rock.

    Speakers - i bought because i trust the Alpine brand, but i was disappointed, if only from a perspective of how these speakers are presented for use. I bought them (along with a set of Kickers) to replace the stock speakers in my 2003 Silverado, set up with a Kenwood Excelon KDC-395. They were listed as replacements for the rear door 4x6 speakers. After the install they sound very clean, and very bright - but TOO BRIGHT. no matter how i adjusted the head unit, i could not get any low end from the speakers. So i decided i really needed 6x9's, even if i have to cut the door panel. I felt a little bad returning them, until i re-installed the stock speakers to hold me over, and they stock speakers have more low end - sounded BETTER - than these. I think they are good speakers, but better suited for a front door setup, not the rear where you need some bottom end. (I put the same head unit in my daughters car with 6x9's in the back and there is PLENTY of bottom end - even without an amp and subs).

    so that's my comments - might work well in some setup, but not as the rear speakers. Get out your metal cutter and put those 6x9's in.
    Pros:
    good sound - bright and clean
    Cons:
    TOO bright
    3 out of 4 people found this helpful
    Was this review helpful?    Yes | No
     
    5 out of 5

    Awesome

    Written By Chris, Danbury, CT on Monday, August 29, 2011
    Installed in a 2001 Chevrolet S10
    Crutchfield Customer Review (What's this?)
     
    I installed this myself in the dash of my 2001 s-10 Zr2. Everything said they won't fit in stock spots without modifications. I plugged them in to my factory wiring with the wiring adapter that was included n with no modifications they fit tightly . They sound awesome along with the alpine cda-105 headunit, and the alpine SPS-600C Type-S 6-3/4" component speakers n tweeters Rock out clear n great. Cannot wait to add my jvc arsenal 10" sub! These speakers way surpassed my expectations for $79.99!!!!!!!!!
    3 out of 3 people found this helpful
    Was this review helpful?    Yes | No
     
    4 out of 5

    porsche 944

    Written By mike, Totowa nj on Saturday, August 20, 2011
    Installed in a 1986 Porsche 944
    Crutchfield Customer Review (What's this?)
     
    First of all I want to say that I love dealing with Crutchfield! They're always very helpful when you have problems! I really like these speakers a lot! They sound great with my JVC BonJiovi powered stereo! Crisp and clear! Especially for only being a two way speaker! There might be better speakers out there than these but they wouldn't fit in the front doors of my car. Trust me.. The price of these is very very low for the quality of the sound! Not a ton of bass but there's no way of getting that from a 4by6!

    The front speakers just barely fit in and the grill is bulging out just a little bit. But in the rear I could have gone with something a little bigger magnet wise... but still stay with a 4 by 6. The hardest part of the rear install was pulling the vinyl apart without tearing it! (fingertip strength) The rest is really not that hard! I built up the rear footwell with a lot of layers of foam so that I could sit back there and work!
    3 out of 3 people found this helpful
    Was this review helpful?    Yes | No
     
    5 out of 5

    Alpine SPS-406

    Written By Adam, Tulsa Ok on Saturday, November 20, 2010
    Installed in a 2003 Chevrolet Silverado 1500
    Crutchfield Customer Review (What's this?)
     
    Replaced my stock 4x6 speakers in my 03 ext cab silverado. Huge improvement,
    clarity and range of music are the biggest changes. Install was easy although
    the speaker installation instructions are lacking. Crutchfield instructions
    included helped out with proper and simple door removal. Overall very
    satisfied. Still running them on the stock stereo, power handling dictates
    turning the volume up a little more than before with stock speakers. Love the
    sound, very good alpine speakers.
    Adam
    4 out of 4 people found this helpful
    Was this review helpful?    Yes | No
     
    5 out of 5

    2002 cavalier

    Written By Tyler, Abington Pa on Saturday, August 21, 2010
     
    To start off i just bought a 2002 cavalier, and i wanted to upgrade my audio system. So I got a full system. I got a Kenwood Excelon KDC-X494 headunit, these 4x6 sps alpine speakers for the doors, 6x9 sps speakers for the rear, Kenwood KAC-6404 4 chan amp for the speakers, a jh600 mtx mono block amp, and a JL Audio 12W3v3-4 subwoofer.

    I also put bass blockers to these speakers because thats what my subwoofer is for. I did test the bass before adding the blockers, and it was fine for a 4x6, but not great. I will say however the mids and highs sounded great with my amp. I would suggest these to anyone building a system. They make my music sound full and lively.
    2 out of 2 people found this helpful
    Was this review helpful?    Yes | No
     
    4 out of 5

    Adapter brackets did the trick

    Written By Rod, Raleigh, NC on Wednesday, June 09, 2010
    Installed in a 1991 Chevrolet Corvette
    Crutchfield Customer Review (What's this?)
     
    These speakers fit perfectly in my '91 Corvette. The OEM's have a rectangular frame and these came with two different adapter plates to choose from to create a perfect fit.
    1 out of 2 people found this helpful
    Was this review helpful?    Yes | No
     
    5 out of 5

    Alpine SPS-406

    Written By joey, clifton, nj on Sunday, January 31, 2010
     
    just installed these in a 04 chevy cavalier. it says they dont fit but it was a perfect fit. they sound great! it and it was a perfect install no mod required to get them to fit into the factory brackets!
    1 out of 1 people found this helpful
    Was this review helpful?    Yes | No
     
    4 out of 5

    Improvement over Wrangler Stock Speakers

    Written By Anonymous, Mt. Pleasant on Wednesday, January 06, 2010
    Installed in a 2005 Jeep Wrangler
    Crutchfield Customer Review (What's this?)
     
    I paired the SPS-406 with Alpine SPS-500s in the roll bar and a Kenwood KDC-X493 head unit. A noticeable improvement over the cheap paper stock speakers on the 2005 Wrangler. A little more bass comes out and the mids and highs are clean & crisp. Don't make the same mistake I made and expect miracles from these speakers. A woofer and tweeter of this size can only do so much. Crutchfield provided prompt service as always and their technical support is awesome. The installation instructions on the speaker box made pairing up the speakers to the adapter plates a real chore.
    [Editor's Note: The adapter needed to install 4x6" speakers in the wrangler dash is no longer available. We now recommend 4" speakers for this location.]
    1 out of 1 people found this helpful
    Was this review helpful?    Yes | No
     
    5 out of 5

    Great Speakers!

    Written By Daniel, Fort Knox, KY on Wednesday, October 14, 2009
    Installed in a 1992 Chevrolet C Series
    Crutchfield Customer Review (What's this?)
     
    First- If you are buying these for the rear panels of an 88-93 Chevy Truck, these are NOT direct fit!!! The opening needs to be slightly modified to accept the metal spacer, or the trim will have to be modified if you use the plastic spacer (which works a little better IMO). As for the speakers, they sound absolutely terrific. Clarity even at very loud volumes is excellent. If you expect a lot of low end, you're looking at the wrong size speaker. These work best with bass blockers and a subwoofer installed for low-end frequencies. They can handle plenty of power, so match them up with a strong enough head unit to maximize results. Great mid and high tones, and as i mentioned before, clarity is awesome. Instructions in the box are terrible. It took me about 30 minutes to figure out what the diagram (no written instructions) were showing, but maybe that was just me. As always, Crutchfield is great and gives you everything you need to do the install except for the trim removing tool (you'll need it). Overall, very pleased with these speakers!
    5 out of 5 people found this helpful
    Was this review helpful?    Yes | No
     
    4 out of 5

    Cant beat the price

    Written By Rafael, Santa Clara, Ca on Thursday, June 18, 2009
    Installed in a 2000 Chevrolet Silverado 1500
    Crutchfield Customer Review (What's this?)
     
    Let's face it, for the price you pay for these speakers you can't go wrong.
    Try hooking these speakers up to an amp, you'll love the way they sound
    for the price you pay. I would buy these speakers again.
    1 out of 1 people found this helpful
    Was this review helpful?    Yes | No
     
    5 out of 5

    Great Buy!!!

    Written By John, North Dakota on Friday, May 22, 2009
     
    I bought these speakers wanting a crystal clear sound. I got just that, I am only putting 18 watts into each of the 4 speakers in my 1993 extended cab silvarado and these are loud. They dont have much bass but thats what a sub is for. I would definatelly suggest these speakers to anyone looking for a good sounding system. Good shipping Crutchfield!
    2 out of 2 people found this helpful
    Was this review helpful?    Yes | No
     
    4 out of 5

    These do not fit 3d generation Firebirds

    Written By sam, huntsville al on Sunday, March 22, 2009
    Installed in a 1983 Pontiac Firebird
    Crutchfield Customer Review (What's this?)
     
    purchased these for my 83 Firebird as the web site indicated they would fit... Web site is incorrect.. these do not fit 3d generation firebirds not sure about camaros...but since they share the same body I suspect they will not

    Contacted crutchfield and servce tech indicated his reference showed these speakers are not a fit...I pointed out the incorrect info on the web site and he gave me a return lable and shipped me some kenwood's that should fit.

    I did plug the speakers in to give a listen...they sounded great...too bad hey do not fit
    5 out of 5 people found this helpful
    Was this review helpful?    Yes | No
     
    5 out of 5

    Alpine SPS-406

    Written By raul, San Antonio, Tx. on Sunday, January 18, 2009
    Installed in a 2002 Chevrolet Silverado 1500
    Crutchfield Customer Review (What's this?)
     
    Good quality sound.
    1 out of 3 people found this helpful
    Was this review helpful?    Yes | No
     
    5 out of 5

    Great sound, 01 Silverado

    Written By Christopher, Siler City, NC on Monday, November 17, 2008
    Installed in a 2001 Chevrolet Silverado 1500
    Crutchfield Customer Review (What's this?)
     
    These speakers sound great. I have them in the back doors of my 01 Silverado extended cab. They fit perfectly, I only had to drill holes for the mounting bracket, but that was pretty easy. I am extremely satisfied with the way these sound. They are paired up with a set of Alpine SPS-600's in the front doors and a CDA-9884 head unit. I am not running an amplifier or sub, but this combo still sounds great.
    17 out of 17 people found this helpful
    Was this review helpful?    Yes | No
     
    5 out of 5

    Alpine SPS-406

    Written By tpchallenger, Chicago Il. on Thursday, October 23, 2008
    Installed in a 1995 Buick Skylark
    Crutchfield Customer Review (What's this?)
     
    Put these speakers in my Buick Skylark doors. All kinds of highs and lows. Sounds great!
    3 out of 3 people found this helpful
    Was this review helpful?    Yes | No
     
    4 out of 5

    Impressed

    Written By Ryan, Apple Valley, Ca on Wednesday, September 10, 2008
     
    Well I started by removing the factory speakers (which were a very poor quality) then soldered the new harness and connectors to the factory wire.

    The negative and only reason I didnt give 5 stars was because I had to re-drill 2 new mounting holes per speaker because of the backing on the speaker.

    Other than that excellent product, somewhat easy install, beginners should seek help of a knowledgeable person to oversee the process.

    Saves you time and money.
    Was this review helpful?    Yes | No
     
    1-20 of 21 >>

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    Smart people protect with SquareTrade- The best warranty at the best price

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    In business since 1999, SquareTrade is the largest independent warranty provider in the U.S.

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    Your item's repaired or the full item price returned withing 5 days

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    Rated 5-stars by consumers

    For a more in-depth review and enhanced detailed information on the Alpine SPS-406, please visit the Crutchfield website product page (/S-bRNGPiToZPH/p_500SPS406/Alpine-SPS-406.html ).

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    • Front

      Alpine SPS-406