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Alpine SPS-406

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

48 Reviews

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Item #: 500SPS406

This item is no longer available.

Original Price: $79.99 pair

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$79.99 pair

Overview

Our take on the Alpine SPS-406

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.

Alpine Authorized Online Dealer

Alpine hi-fi

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.

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

Good speakers, sound quality and easy install

Bill, Wisconsin

Featured Video:

What's in the Box:

  • 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

Product 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
Reviews

Alpine SPS-406 Reviews

Average Customer Review:

48 Reviews

Great speakers

Bill from Wisconsin on 10/1/2015

1978 Chevrolet Corvette
Crutchfield Customer Review (What's this?)

Good speakers, sound quality and easy install

Pros: Work well, ease of installation and good sound quality

Cons: None

Alpine SPS-406

Trucker dude from Anchorage, Ak on 8/8/2015

1993 GMC Sierra
Crutchfield Customer Review (What's this?)

These work great with and sound fantastic with the rest of the alpine gear in my sons truck

Pros:

Cons:

1984 Porsche 911 rear deck shelf

Barney from Washington on 7/10/2015

Crutchfield Customer Review (What's this?)

I wanted to retain the original speaker grilles in order to maintain the stock appearance. With the help of my Crutchfield advisor these were chosen and they fit perfectly in the existing space and with the stock grilles and they sound great! thank you.

Pros: exact fit with the factory grilles

Cons: none come to mind

Perfect fit

Mike T from Alabama on 6/14/2015

1998 GMC Sierra
Crutchfield Customer Review (What's this?)

Installed in 1998 GMC Sierra Z71 extended cab and the speakers fit perfectly with no adapter necessary. They sound good and I'm pleased with the quality.

Pros: Easy to install (once you get the truck depaneled) and speakers sound good.

Cons: I can't think of any cons with these speakers. The only con was having to remove so many panels and my rear bench seat to install the new speakers.

Great Speakers

B from Mechanicsburg, PA on 5/17/2015

1986 Fiat X1/9 Bertone
Crutchfield Customer Review (What's this?)

The sound is loud and amazing!!!!

Pros: U can crank it loud and ant going to hurt them

Cons: Not a lot of bass

Great quality, great sound

Alex from Maine on 4/11/2015

1985 Porsche 944
Crutchfield Customer Review (What's this?)

Alpine deserves an a+ on this one, great quality on the build. Fantastic sound for a 4x6 speaker, remember these are 4x6 speakers, bass will barely exist. The best bang for the buck in 4x6 speakers and definitely one of the best sounding 4x6 speakers on the market. I put these in a Porsche 944, for the front doors you have to use a grille assembly for the rears they fit perfectly. I have used many 4x6 speakers and these are better than excellent in my book. Make sure you use a quality headunit with a true equalizer because these definitely tend to be bright.

Pros: A+++++ build quality, A+++++++ sound

Cons: A bit bright but with the right headunit there are excellent.

Alpine SPS 406

Marc from Florida on 3/17/2015

2000 Chevrolet Silverado 1500
Crutchfield Customer Review (What's this?)

These speakers really made the difference when installed with the Alpine SPS 610C in the front doors of my Silverado. These were the last speakers installed and really helped balance the sound throughout the vehicle. Great value on a good quality speaker.

Pros: Ease of installation Great build quality Reasonable price

Cons:

1997 Chevy c1500 exstened cab sound great lots highs and mids from sma

Txwoodpecker from Texarkana, TX on 2/26/2015

1997 Chevrolet C Series
Crutchfield Customer Review (What's this?)

installed on 1997 Chevy exstened cab 3rd door. Lots highs and great mids

Pros: Awesome sound

Cons: Didn't fit factory location proper, had use washers to hold speaker in place

Great Speakers

JarvisK from Arizona on 2/2/2015

1999 Chevrolet Cavalier
Crutchfield Customer Review (What's this?)

Just replaced my front door speakers with these. They are excellent they fit perfectly and sound is amazing. Have been putting off replacing my front speakers. A great choice with these speakers.

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alpine

Anonymous from Hortense, Ga on 1/13/2015

2006 Chevrolet Silverado 1500
Crutchfield Customer Review (What's this?)

These are great value and sound.

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ALPINE SPS- 406

Anonymous from Texas on 11/30/2014

Awesome speakers. Not a ton of bass but i mean they are 4x6. Clear sound is the goal with these anyways. Best speaker available in this size class. Fits perfect in a 99-06 silver ado.

Pros: sound quality, price, high quality

Cons: none

car speakers

kevin c from buena vista co. on 9/28/2014

1999 Chevrolet K Series
Crutchfield Customer Review (What's this?)

good price and sounds good

Pros: easy install

Cons: none

Alpine SPS-406

Tom from Middletown, CT on 6/22/2014

2009 Chevrolet Silverado 2500/3500
Crutchfield Customer Review (What's this?)

These speakers worked great in my buddy's jeep wrangler. We used them to replace the factory front dash speakers and they make a world of difference. Even un-amped these speakers are loud enough to hear clean, crisp sound with the doors removed and top down. Lacking base but the sound quality is stunning. The only downside was having to make custom brackets to replace the stock mounting brackets but it wasn't too bad. Overall great product, as usual great stuff from alpine and great easy buying experience from crutchfield. Fast free shipping too.

Pros: Great sound, loud, clear and crisp highs

Cons: Lacking base, custom mounting brackets for certain applications

Alpine SPS-406

Anonymous from Palmer, AK on 6/18/2014

2001 GMC Sierra 1500
Crutchfield Customer Review (What's this?)

Excellent sound quality. They sound great in the back doors of my 01 GMC Sierra combined with an Alpine CDE-143BT. HUGE improvement over stock.

Pros: Great sound quality

Cons: None

alpine sps-406

Nick P. from glenford ohio on 6/7/2014

They were alot better than the factory speakers that were in my 1995 s10 on a cheap Sony head unit they sounded great low bass but excellent for the size good clean crisp highs I would get another pair again any day easy install for not supposedly fitting speakers

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Alpine SPS-406

Anonymous from Carmichael, CA on 4/26/2014

1999 GMC Sierra Classic
Crutchfield Customer Review (What's this?)

Speakers sound so much better than my stock 1999 GMC speakers did. I am just running them with an aftermarket Sony deck. Think I want to get an amp to help power them.

Pros: Clear sound. Fit fine in my stock 1999 GMC crew cab(old body style) speaker locations

Cons: None

Much better than I expected

Metalman from Mount Morris MI on 3/31/2014

2000 Chevrolet Silverado 2500/3500
Crutchfield Customer Review (What's this?)

For being small speakers, they sure do kick well in my 2000 Silverado.

Pros: Moderate to difficult install in my particular application, but great sound after installation.

Cons: None so far

Excellent speakers!

Anonymous from Alabama on 3/12/2014

1989 GMC Sierra
Crutchfield Customer Review (What's this?)

I purchased these speakers to replace the 25 year old stock speakers in my 89 GMC Sierra and they sound great. The crystal clear highs are very nice.

Pros: Clear sound

Cons: None

2000 Silverado Happy

MikeM from Houston, TX on 2/6/2014

2000 Chevrolet Silverado 1500
Crutchfield Customer Review (What's this?)

This speaker was an excellent match for my Alpine MRP-F240 amplifier and Alpine SPS-610C in front. The bass was better than I expected and the tweeters are awesome! Installation was a easy, my only minor challenge was determining which adapters to use. Over all I am very satisfied with sound quality and installation.

Pros: Great sound and installation

Cons: none

Alpine SPS-406

Aloha808 from Hawaii on 2/4/2014

2003 GMC Sierra 1500
Crutchfield Customer Review (What's this?)

Cherry set of coaxial speakers, got this hooked up in the rear doors of a Chevy extra cab pick up and they scream and sound very clear...

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Alpine SPS-406

Happy customer from Fort Hood Texas on 12/23/2013

2003 Jeep Wrangler
Crutchfield Customer Review (What's this?)

I recently purchased a 2003 Jeep Wrangler that had more blown and aged speakers than working. I have ordered through Crutchfield in the past and enjoyed the ease of both finding the right set up and install equipment, so they were my only choice. The speakers and deck arrived all well packaged and a few days later. Text book install and the sound quality cant be described.

Pros: great mids and highs

Cons: none

Alpine SPS-406

Anonymous from Zion Crossroads, VA on 11/18/2013

Crutchfield Customer Review (What's this?)

The sound quality is great.

Pros: Installed in my 2001 S10 Chevy with ease.

Cons: Made some adjustments but nothing major.

Alpine Speakers

Anonymous from Corpus Christi, TX on 8/27/2013

2000 Chevrolet Silverado 1500
Crutchfield Customer Review (What's this?)

I have these speakers in the rear doors of my Chevy Silverado Ext. Cab. They are running off an Alpine Reciever and the Alpine Power Pack. Have had them installed little over a week now. They sound great, but I have to have the fade set up higher on front speakers to avoid these speakers from popping. Not a big deal. Doing this makes for clean, clear sound that meets my listening needs and expectations. Install was easy. They arrived when expected. Speaker harness makes it a clean installation with no wire splicing. Very happy with my purchase. Can't beat the price. Would recommend to a friend.

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Great speakers

ButchE from Mount Olive, AL on 8/3/2013

2002 GMC Sierra 1500
Crutchfield Customer Review (What's this?)

Installed these in my GMC Sierra 1500 ext cab 4 door. These were a breeze to install with the provided mounting brackets and wiring adapters. These provide a nice full range sound for there size. Much better than the factory ones.

Pros: Great sound and ease of installation.

Cons: None

Alpin SPS-406

Dale from Nelson, NE on 7/10/2013

1999 Chevrolet K Series
Crutchfield Customer Review (What's this?)

Great sound quality even with a stock head unit, but had to drill holes to make it fit

Pros: Great clear crisp sound

Cons: Had to drill holes to install in 1999 Chevy Silverado 3-door

Worked great for the dash of my Wrangler TJ

Tom s from Huntington, WV on 6/17/2013

Crutchfield Customer Review (What's this?)

Got these speakers to replace the ones in front dash of my TJ. It is a 1998 so really had some age on the speakers. Replaced rear a while ago and fronts sounded so bad, I had "faded" my stereo to the rear. These speakers were larger and move more air to give me a full sound all the way around the vehicle now. Very happy with them and EASY to install. Crutchfield always gives you the directions and parts needed so no worries. I had this done in 30 minutes. Wife couldn't believe how fast it was finished.

Pros: Great full sound. Fit my vehicle thanks to website directions. Good price for sound.

Cons: None.

alpines

kdak from columbus, oh on 6/3/2013

Crutchfield Customer Review (What's this?)

Good stuff. Produces great sound at all levels. Easy fit. I would recommend them to anyone

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Alpine sps-406

Anonymous from Honeoye, ny on 2/28/2013

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

Good speakers

Ashley from North Augusta, SC on 12/24/2012

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

great sound quality

JarvisR from Whitewater WI on 7/2/2012

2006 GMC Sierra 1500
Crutchfield Customer Review (What's this?)

Sound quality is great and they pair well with my Alpine receiver.

Pros: sound

Cons:

Sps-406 speakers

Rick from Iowa on 6/7/2012

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.

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Cons:

A little too bright

clayr from wilmington, nc on 2/4/2012

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

Awesome

Chris from Danbury, CT on 8/29/2011

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!!!!!!!!!

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porsche 944

mike from Totowa nj on 8/20/2011

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!

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Alpine SPS-406

Adam from Tulsa Ok on 11/20/2010

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

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2002 cavalier

Tyler from Abington Pa on 8/21/2010

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.

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Adapter brackets did the trick

Rod from Raleigh, NC on 6/9/2010

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.

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Alpine SPS-406

joey from clifton, nj on 1/31/2010

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!

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Improvement over Wrangler Stock Speakers

Anonymous from Mt. Pleasant on 1/6/2010

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. <br> <b>[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.]</b>

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Great Speakers!

Daniel from Fort Knox, KY on 10/14/2009

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!

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Cant beat the price

Rafael from Santa Clara, Ca on 6/18/2009

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.

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Great Buy!!!

John from North Dakota on 5/22/2009

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!

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These do not fit 3d generation Firebirds

sam from huntsville al on 3/22/2009

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

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Alpine SPS-406

raul from San Antonio, Tx. on 1/18/2009

2002 Chevrolet Silverado 1500
Crutchfield Customer Review (What's this?)

Good quality sound.

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Great sound, 01 Silverado

Christopher from Siler City, NC on 11/17/2008

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.

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Alpine SPS-406

tpchallenger from Chicago Il. on 10/23/2008

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!

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Impressed

Ryan from Apple Valley, Ca on 9/10/2008

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.

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Crisp, Clean, Brilliant.

Michael from Succasunna, NJ on 5/8/2008

2001 Chevrolet Malibu
Crutchfield Customer Review (What's this?)

You cant ask for anything more in a 4x6 speaker. The highs are great and they can still handle a little bass. These can get very loud and still sound enjoyable. The distortion at high volumes is minimal. They sound way better then the $100 speakers I switched them with. I have these amped and hooked to an after marked head unit, which I would recommend. I am very satisfied.

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Details

Hands-on research

Product Research

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.

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.

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