Alpine Authorized Online Dealer

Give your nautical journeys a boost with a new pair of marine speakers. Alpine's SPS-M600 6-1/2" marine speakers use a time-tested design to boost the performance of your boat's audio system.

Alpine equips its speakers for high power handling, so they'll cut through the noise of the wind, waves, and motor. The stiff 6-1/2" polymica woofers deliver powerful, accurate reproduction, while the titanium/PEI tweeters supply plenty of high-frequency detail.

Alpine built the SPS-M600 speakers to withstand the tough environmental conditions of life on the water. The speakers sport silver UV-resistant grilles and high-temperature custom frames that stand up to direct exposure to the sun, while treated cloth surrounds resist damage from moisture, heat, and motor oil. Your speakers won't turn yellow or lose any musical zip.

Priced per pair

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

Product Highlights:

  • 6-1/2" 2-way marine speakers (pair)
  • polymica woofer with coated cloth surround
  • 7/8" titanium/PEI balanced-dome tweeter
  • built-in tweeter protection
  • silver UV-resistant grilles and high-temperature ABS custom frames
  • power range: 2-35 watts RMS (110 watts peak power)
  • frequency response: 60-22,000 Hz
  • sensitivity: 89 dB
  • top-mount depth: 2-7/8"
  • warranty: 1 year
  • Our 60-day money-back guarantee

Alpine SPS-M600 Reviews

Average Customer Review:

40 reviews
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Alpine SPS-M600

Written By LVG, New Mexico on Wednesday, July 15, 2015

Crutchfield Customer Review (What's this?)

Easy Install sounds great

Pros: Idiot proof

Nice speaker for the money

Written By Brandon, Minnesota on Monday, June 22, 2015

Crutchfield Customer Review (What's this?)

An alpine marine speaker for 70 bucks is a great deal

Pros: Purchased 3 sets for a friends boat. Hooked two up to the deck alone and one set to a small alpine amp. The amp makes a huge difference in the quality of sound.

Cons: None

Sounds great. Couldn't ask for anything better.

Written By Mbhutson, Arizona on Sunday, June 21, 2015

Crutchfield Customer Review (What's this?)

Great sounding speakers. Can compare them to a Polk audio any day. Only complaint I have is the speaker covers clip on. The screws don't hold them in. Hopefully they last ok.

Pros: Sound great.

Cons: Covers clip on instead of being screwed in with the actual speaker.

Great alpines

Written By Jake, Bristol, wi on Tuesday, June 16, 2015

Crutchfield Customer Review (What's this?)

Great speakers. Sound great and perform to my expectations. I actually ordered a second pair so I would have a total of 4 for great sound. I can hear the radio over then engine when I am cruising and up on plane.

Pros: Grey grills match or accentuate most carpets very well. Easy to mount and wire as there is a template with screw holes on the box.

Cons: None so far

Alpine SPS-M600

Written By Anonymous, California on Sunday, June 14, 2015

Crutchfield Customer Review (What's this?)

Speaker is excellent at a very reasonable price. Best of all was customer service which provided free return shipping of wrong item I mistakenly ordered and sent me this item quickly. I've been a happy customer of Crutchfield for over 30 years thanks to service like this.

Pros: Looks good, fits properly, and provides quality sound.

Alpine SPS-M600

Written By Phoenix, Bristol, wi on Sunday, June 14, 2015

Crutchfield Customer Review (What's this?)

Great sounding speakers

Pros: Easy to install. Grey covers actually matched my carpet better than the normal white or black. Carries sound well, matched up with a Kenwood head unit.

Cons: None I can think of off hand

best value on the water

Written By Anonymous, new york on Monday, June 08, 2015

Crutchfield Customer Review (What's this?)

These things sound great. They replaced some clapped out kenwoods and the difference is amazing. I've been running custom gear from crutchfied for years and was thrilled with the deal they ran on these. You should definitely put them on your list of things to put in your boat.

Pros: Price Clarity

Cons: Light on the bass

Great Speakers

Written By James, Alabama on Monday, June 08, 2015

Crutchfield Customer Review (What's this?)

Absolutely love the speakers. Bought them to install as a gift on my father's pontoon. Now everyone is enjoying the quality sound.

Pros: Great sound and clarity. Typical Alpine sound.

Cons: No Cons


Written By Chad, White lake mi on Wednesday, June 03, 2015

Crutchfield Customer Review (What's this?)

They sound great.

5th Wheel Upgrade

Written By Steve, Mosinee, WI on Wednesday, June 03, 2015

Crutchfield Customer Review (What's this?)

I bought these to replace a different brand speaker that were 5 1/4" speakers and couldn't handle high volume without distorting. I had to cut the holes in the gel oat of my camper a little bigger which wasn't a problem. These new speakers are like night and day compared to the old ones. At full volume they are still clear and crisp. More base than the originals as well. Worth every penny.

Pros: Great range of sound. Easy install.

Cons: Make sure to install speaker plumb so the cover is not crooked when it snaps on.

Alpine Speakers

Written By KurtB, North Carolina on Wednesday, May 27, 2015

Crutchfield Customer Review (What's this?)

Need to replace speakers on my boat. The Alpine speakers arrived in 3 days, no problem in installation. The old holes didn't line up so I just used the new speakers as a template. Would be nice is Alpine include the screw holes on the diagram on the punch outs on the back of the box. So far, they sound great and were easy to install

Alpine SPS-M600

Written By Tom H, California on Thursday, May 21, 2015

Crutchfield Customer Review (What's this?)

Only site I found Alpine speakers & I needed replacement speakers fast. Got the speakers with free shipping within 3 days. Installation was quick and easy even for me.

Pros: Quick & Easy installation. Great sound at a reasonable price.

Alpine SPS-M600

Written By john N, powell ohio on Wednesday, October 22, 2014

ease of installation and great sound

Pros: ease of installation and great sound

Alpine SPS-M600

Written By Mark B., MO. on Friday, August 08, 2014

Crutchfield Customer Review (What's this?)

An awesome set of speakers I installed them in my 2009 RZR and they perform excellent, I also have them connected to a 400Watt Pioneer amp.

Pros: Easy to install.

Cons: None

Alpine marine speakers

Written By Anonymous, Annapolis, MD on Saturday, June 14, 2014

Crutchfield Customer Review (What's this?)

Very good speakers. Good amount of bass for just running off the head unit. Also very clear at high volume I've had several other brands that would crackle and sounded horrible at levels I can play these at.

Pros: Very durable and water has yet to hurt them.

Cons: Comes with a silver cover so I painted mine white to match the boat.

great sound and solid value

Written By Jason, Fairview, NC on Wednesday, February 26, 2014

Crutchfield Customer Review (What's this?)

I bought 4 of these for my speedster 200. The silver finish looks sharp installed. I replaced clarion speakers that the cones were gone. Hoping to get more longevity out of these. The sound is clear and am very impressed at how much i notice the difference. Great value

Pros: Value

Cons: None yet. Hoping for a long life

Alpine SPS-M600

Written By Mike M, Cape Coral FL on Tuesday, October 29, 2013

Crutchfield Customer Review (What's this?)

Just replaced my MTX marine speaker with the new Alpine 6.5 and they are rocking my old MTX were only holding up for about 6 month and my 7.5 Alpine I have had installed for over two years still sound great so I have high hopes for the 6.5 I will let you know in about a year.

Alpine SPS M600

Written By Randy, Rural Hall, NC on Tuesday, August 20, 2013

Crutchfield Customer Review (What's this?)

Great speakers.

Pros: Arrived on time, Great service

Cons: None

boat speakers

Written By bb, cape cod on Thursday, July 11, 2013

Crutchfield Customer Review (What's this?)

they sound very good. i haven't had them long enough to rate durability but they seem well made. the last ones from west maring didn't last more than a couple of years.


Written By Anonymous, Missouri on Sunday, June 16, 2013

Crutchfield Customer Review (What's this?)

Great speakers had to make a spot for them, but so glad I did

Pros: Sound

Cons: big

alpine speakers

Written By Dan W, east greenwich ri on Tuesday, June 04, 2013

Crutchfield Customer Review (What's this?)

bought these speakers to replace the old blown out clarion speakers that originally came with my boat. the difference between the speakers is amazing, these speakers sound much cleaner and have a lot more bass.overall these speakers are great, they sound fantastic and have a good price

Pros: price, sound quality

Cons: none


Written By 1980crestliner, Janesville, WI on Saturday, April 27, 2013

I installed these in my 80 crestliner Apollo 660. The boat had nothing and had to install everything custom. I have them hooked up to my alpine deck that I have had since 06. Sound quality is great. I got to test them before I bought from my local dealer and was impressed for the $90 I was charged. All around good buy if u are looking for quality at a good price.

Pros: Sound, price, quality

Cons: None

Pleased with these speakers

Written By dans270, Watsonville, ca on Wednesday, July 04, 2012

Crutchfield Customer Review (What's this?)

Very good sounding speakers for the money.

Pros: To me they sound good and seemed to be well built.

Cons: none

Not so happy with these speakers

Written By Mat, MN on Friday, June 15, 2012

Crutchfield Customer Review (What's this?)

I thought the sound quality of these speakers was not very good. I returned them and will be trying another set of speakers. Crutchfield has been great with the return.

Alpine SPS-M600

Written By j.r, michigan on Thursday, May 24, 2012

Crutchfield Customer Review (What's this?)

installed in a glass bodied dune buggy. sound is good and clear even over a very loud engine

Great sound for great price

Written By Shawn, Pittsburgh PA on Wednesday, May 02, 2012

Crutchfield Customer Review (What's this?)

These speakers sound great for the price. I replaced the original Alpine speakers in my boat (which were not marine speakers) with these ones. Great clear crisp sound! Im also pushing some bass through a Bazooka bass tube that i mounted under the dash, Im jammin and turning heads all day on the river.

Pros: Great Price, Easy Install, Well Constructed sepakers! Quality sound from an Alpine product, as usual!

Cons: Nothing yet

great speakers

Written By Andy, Charlotte, NC on Sunday, April 22, 2012

I installed 4 of these in my Glastron bow rider to replace the stock 2 speaker (5") cassette stereo. I have them hooked to a Kenwood KMR-350U deck. I am very happy with the sound quality and volume these speakers put out. They are exactly what I was looking for. I can't wait to get back on the water and crank the tunes!

Pros: Great sound, great looks

Cons: none

Just What I Paid For...

Written By Brian D, Columbus, OH on Tuesday, April 03, 2012

Crutchfield Customer Review (What's this?)

Definitely worth the price! Replaced a set of old 5" 2-way speakers on my boat and the difference borders on amazing. Paired them with the Kenwood KMR-440U and the RMS wattage from the receiver seems well matched to these Alpines since they handle wide volume ranges with pretty accurate reproduction. In fact, with the bass boost on max and cranking some volume, the speakers really didn't distort as much as expected.

Pros: Great sound; nice appearance with the stock grilles

Cons: None (so far)


Written By Bill, Asheville,NC on Sunday, April 01, 2012

Crutchfield Customer Review (What's this?)

I am excited to hit the lake this summer with these speakers!!! Last year we did'nt have music. Make way for the party barge! Just finished installing a Clarion M109 HD and two of the Alpine MPS-M600 marine speakers. One speaker is mounted in front of the helm and the other on the starbord side, behind the captain's chair, mounted close to the floor of the back seat. So, with this setup,speakers six feet apart facing two directions,I was concerned on how it would sound. Not any more! WOW! I am more than pleased and the bass is awesome especially since I was not exspecting any. I have owend Alpine decks and really do like the sound they put out . This is the first time I've bought Apine speakers and love them. INCREDIBLE SPEAKERS!

Pros: very nice bass

Cons: none

Awesome Replacement Speakers !!

Written By Nick.C, Tampa Bay FL on Monday, August 15, 2011

Crutchfield Customer Review (What's this?)

I came on here and read all the reviews on these speakers before my purchase. I was very pleased to find out that they lived up to their reviews, great sound, and the clarity is awesome. I would recommend these speakers to anyone !! and you cant beat the price and customer service, when you call crutchfield you actually get someone who knows the products their selling.

I also needed some cables so that I can hook my Iphone into my radio and play my music. All They needed was the serial # off the deck and they hooked me up.

2003 Chap 200ssi Replacement

Written By Satisfied Customer, McKinney Texas on Monday, August 01, 2011

Crutchfield Customer Review (What's this?)

Just replace 4 stock JBL speakers in my 2003 Chap 200ssi. These are excellent speakers and the install was very easy. I did all 4 on the water in about 20 minutes. Still using the JBL tuner so I am upgrading to an Alpine soon and I am sure they will sound even better. I research a lot of speakers and decided on the Alpine. These speakers sound so good I could not justify spending another $100 per pair. I would suggest these speakers to anyone who is interested in a major upgrade from stock that does not want to break the banks :)

Alpine SPS-M600

Written By Tim, Arkansas on Sunday, July 10, 2011

Crutchfield Customer Review (What's this?)

Purchased these to replace 15 year old speakers in my fish/ski boat. For small 2-way speakers the sound quality is excellent. Very clear sound and the bass is adequate. Good build quality.

Alpine SPS-M600

Written By qpbi, Weirsdale, Florida on Sunday, June 27, 2010

Crutchfield Customer Review (What's this?)

Sound great, could be a little better with base, but they are 6.5" so what else can I ask for. If you want to listen to music while you are running around the lake, you might want higher powered speakers. With engine noise etc... they get drowned out. It would take quite a system to sound good on the go, not sure I could handle all that.

Great Speakers, Great Bargain

Written By Joe, Brighton, MI on Wednesday, May 05, 2010

Just installed these speakers in my 2008 Glastron GT225 to replace the (lame) factory speakers. No amplifier, just powered by the Alpine CDA-118M marine stereo I bought at Crutchfield and it sounds AWESOME. Dropped into the existing 5" cutouts, crimpled new terminals, drilled 4 new holes and was rocking in less than 2 hours. For fun I unstalled the port side speakers first, keeping the factory speakers in the starboard side. I switched the balance back and forth to hear the difference and oh my it will be a different summer on the boat. Highly recommended and the price is a bargain.


Written By Anonymous, Ashland,Oregon on Sunday, March 07, 2010

Crutchfield Customer Review (What's this?)

These speakers are great. Crisp and clear. Would recommend them to everybody.

Very Good Buy

Written By Patrick, IL on Saturday, September 05, 2009

These replaced two factory speakers that were blown. I was amazed how they sound with my cheap receiver. Normally the receiver is the most important piece of equipment for sound and clearity, but these speakers really made my system sound much better.

I was amazed how clean and sharp these sound. The bass is there but not overburdened; they can go very loud if you want them to.

I highly recommend these inexpensive speakers for better sound in your boat.

Clear and crisp

Written By John, Woodbridge, VA on Sunday, June 28, 2009

Crutchfield Customer Review (What's this?)

I purchased 2 pair to run with my Sony Marine CDX-M30 (52W X 4) and am very pleased with the clear and crisp sound. Bass is sharp but those who like a lot will want to add a sub-woofer. I would definitely recommend these speakers.


Written By Hieu, Saint Augustine, FL on Tuesday, May 26, 2009

Crutchfield Customer Review (What's this?)

I added two Alpine speakers in the bow which is pushed by Sony CDX- M60UI. Adding the two speakers in the bow of my SeaRay 180 Sport is just "WOW"! I only had 2 speakers in the stern which gets drowned out when I am running the boat. Now, with the four speakers set up, I can hear my music. The bow of my boat acts like an enclosure and the bass on the Alpine really hits good especially for not running an amp. I was very amazed at the bass and treble from the speakers. This is a must buy!


Written By Floyd, Columbia, SC on Sunday, July 01, 2007

I had 4 older model pioneer 6 1/2" 2 way speakers on my pontoon boat but two of them sounded terrible because they were blown and the other two I thought sounded pretty good..that is until I bought a pair of the Alpine SPS M600 6 1/2" two way coaxal spekers shown here. My remaining two good pioneer speakers sound terrible when compared to my Alpines so I'm buying another pair. These speakers are so powerful and have phenomenal sound quality. I don't even need an amp and I thought I would have to buy one. I'm buying two more because these are by far the best speakers I've ever purchased. You can't go wrong with these speakers... A++++

Alpine SPS-M600

Written By Micah, Baton Rouge, La. on Monday, May 07, 2007

Crutchfield Customer Review (What's this?)

Easy to install. Replaced factory speakers on a Chaparral and sound much better that expected. I also have an Alpine 200watt amp driving these speakers.

Hands-on research

What's in the box?

Download owner's manual

  • 2 Coaxial marine speakers
  • 2 Silver Grilles
  • Two 10' Lengths of speaker wire (each has female quick-slides on one end and bare wire on the other)
  • 8 Mounting screws
  • 8 Speed clips
  • Cutout template (on box)
  • Customer care registration form
  • Warranty information

Product Research


Woofers: Each speaker has a 6-1/2" poly-mica woofer cone and coated cloth surround to handle the marine environment.

Tweeters: Each speaker uses a 7/8" titanium and PEI (Polyetherimide) balanced dome tweeter. A built-in circuit helps protect the tweeter from being overdriven.

Grille/Basket: Centrex 813-coated grilles and high-strength, non-resonant, high-temperature ABS frames provide durability in fresh or salt water, and UV protection against yellowing. The silver grilles are removable, but are used in most marine applications. With the grilles in place the speaker mounting height is 0.893 inches, versus 0.605 inches without the grilles.

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.