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Home / Product Category / SPEAKERS / Ceiling Speakers / 8" In-Ceiling Speakers / Ceiling Speaker 8" MK Angled LCR Kevlar® Woofer MK870 Dolby Atmos® Ready

Ceiling Speaker 8" MK Angled LCR Kevlar® Woofer MK870 Dolby Atmos® Ready

Product code: OSD-MK870

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OSD Price: $129.95
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Features & Specifications

When you need the very best drop ceiling speakers, these 8-Inch Angled Ceiling Speakers are a very smart choice. The MK870 (which replaces the ICE870) is the flagship in-ceiling speaker at Outdoor Speaker Depot, and a very popular model. It is designed for high-end audio systems and larger home theater rooms. Audiophile features include an 8-inch Kevlar® woofer, 1-inch aluminum dome pivoting tweeter, and this high performance speaker can handle 175 watts of power. These speakers also have front-mounted contour switches, so you can tailor bass and treble up or down. These drop ceiling speakers are designed to look as good as they sound and will complement various kinds of de´cor and room finishes, such as a wood floor, carpeted floor or stone floor.

Installing ceiling mount speakers in a suspended ceiling requires special wiring considerations, but it's a great option when the room setting is for some reason not ideal for a standard home theater sound installation. Read the information below for a detailed explanation of what makes these speakers so unique. We also include guidelines for installing in-ceiling speakers.

What Is An Angled In-ceiling Speaker?

The angled speaker is a real problem solver because not every room or space is the ideal setup for custom home theater sound applications. The angled in-ceiling speaker features a 15 degree angle for the mid bass driver plus a pivoting tweeter for placement flexibility. This speaker can be part of three piece set to handle the front stage of the surround system when both on-wall and in-wall are not a favorable option. The angled design allows the ideal placement in the ceiling closer to the wall just above the monitor. The angled design is by natural the best setup for Dolby Atmos firing down speaker setup. This creates a more realistic sound image when compared to normal in-ceiling speakers that are mounted closer to directly above the viewing area. Standard in-ceiling speakers are generally placed at least three feet from the wall to avoid reflective sound. The angle speaker can be placed within a foot of the wall

What Is Butyl Rubber Surround?
With almost double the shelf life of foam, butyl rubber has been the choice of speaker designers looking to optimize the sound based upon materials that go together. The Surround is just one of the integral parts of the speaker's motor structure. Butyl Rubber gives the speaker more excursion capability featuring a deeper bass with a wider frequency response, and its shelf life is closer to 25 years compared to the foam at 12 to 15 years.

Do I Need Special Cable for In-ceiling speakers?

Wiring is not included with in-ceiling speakers so you will have to purchase some. While wiring requirements will depend on your local building codes, OSD Audio offers CL3/FT4 cable that is UL (fire) rated for all residential and most commercial in-wall and in-ceiling applications. (The exception is you cannot run this cable in heating or cooling ducts in commercial applications.) This cable includes a heavy-duty outer jacket approved for in-wall/in-ceiling installation. The high quality plastic jacket is also very flexible so it's easy to run the wires inside the wall.

Testing the Sound Quality of In-ceiling Speakers
Many customers like to test the sound quality of their new OSD Audio in-ceiling speakers before they install them. Keep in mind, however, that these flush-mount speakers are designed to be used in the wall or ceiling. Uninstalled in-wall/in-ceiling speakers will sound weak and tinny because without the proper enclosure (in this case your house wall) the speaker can’t produce the sound pressure level it needs. If you want to try them out, we recommend mounting the in-ceiling speakers into a box of about 3 cubic ft. or larger; or simply mount them in the ceiling and then listen. This will give you an accurate measure of the sound quality.

For a retrofit installation, no construction bracket is needed.


Other Product Info

MK870 is our flagship LCR in-ceiling speaker and is designed for larger theater rooms and high-end systems. They Feature an 8" Kevlar® woofer, 1" aluminum dome pivoting tweeter and 175 watt power handling. Plus, you can tailor bass and treble up or down thanks to front-mounted contour switches. This is specially handy to fit your different room finishes (wood floor, stone floor, carpet floor...). The ICE870 speakers will look good and sound great for years to come. Kevlar® is the best component for woofers. It responds note for note without coloration and has big cranking power so you can dial up your system for higher listening levels. The contour switches will let you tailor frequency response to your room arrangement. You won't find yourself wishing for more or less treble, midrange or bass output from one speaker just because you don't happen to sit right between them.


  View Owner's Manual          


By Matt from West Virginia on March 18, 2012
I'm looking to install either 6.5" or 8" speakers in the celing tiles of a drop ceiling in my basement. Do I need to use a bracket or will the ceiling tile support the weight of the speaker?
By Customer Service - Q&A on March 19, 2012

The optional bracket would be great support for speaker in a drop ceiling. For the ICE870, we list the OSD-NCBC8-K. (Brackets are listed in the features and specs for each speaker)

By Ben's CPU from chicago, IL on October 31, 2012
i have an angled ceiling...what speakers would be best for this application? The room is not too large bt the ceiling presents a problem...any ideas???
By Customer Service - Q&A on November 1, 2012

Hi Ben,

When in-ceiling speakers are used for background music (instead of critical listening or Surround Sound), we recommend an 8" speaker over 6.5" and two pair versus one pair. For the ultimate coverage, OSD offers in-ceiling speakers that feature Dual Voice Coils and Dual Tweeters. The rule of thumb is to mount the in-ceiling speaker at least three feet from the walls to avoid reflections; however, with angled ceilings like your application, you would mount the speakers closer to the wall. We recommend using dual voice coil speakers such as our ICE640TT as a stereo pair (utilizing the 8/16 ohm application switch set to 8 ohm while only connecting a single voice coil). If you have the room for two pair of DVC speakers, this would give you 8 tweeters and almost double your prime listening area. We also offer a step up speaker the MK690TT which features a Kevlar® Cone and a trim-less grill design (check it out). We would recommend connecting the two pairs of speakers (if you have the room) as a right and left on one side and left and right on the other. If you send me the dimensions of the room a digital picture or two, I can clarify this further. My email is Thank you for considering OSD Audio.


By Darren from Atlanta on November 23, 2012
I am considering using these as in-ceiling rear surrounds in a 5.1 setup with bookshelf front and center channels. I'm curious if the angled housing provides any advantage over a straight housing with only a pivoting tweeter.
By Customer Service - Q&A on November 23, 2012

Hi Darren,

The biggest advantage to angled in-ceiling speakers is the flexibility for finding the optimum placement for your surrounds. The ideal placement for any surround speaker is to have the tweeter pointing directly at the ideal viewing/listening/seating area. A standard in-wall needs to be mounted almost directly above and the tweeter is limited to a 15% pivoting angle. You also want to be at least three feet from the wall to avoid reflections. With angled in-ceiling speakers, you can mount the speaker further back and closer to a wall if needed, thus opening up your possibilities.

TL/MA 1402

By Stefan from Stockholm, Sweden on November 22, 2011
Has anyone tried to paint over these to match the ceiling better?
By Customer Service - Q&A on November 22, 2011


All of our in-ceiling and in-wall speakers are paintable. Included in the box is a cutout template that also doubles as a paint shield that can be placed under the grill while you paint both the frame and grill together. Spray painting is recommended.


By Nimish from chicago, il on August 6, 2012
This speaker is out of stock until Aug. 31. How realistic is this? I am in need of 4 of these speakers. Any chance this speaker is availble anytime earlier? Can you please give me an accurate date?
By Customer Service - Q&A on August 8, 2012

Hi Nim:

The latest word is the ICE870 are not scheduled to arrive until mid September. The next alternative is the MK670 LCR speaker which is currently scheduled to be here before the end of August. They share the same tweeter and also feature Kevlar® cones.


By SAM from LA CA on December 14, 2012
Hi, I have an angled ceiling about 18 feet high. Can I use these ceiling speakers?
By Customer Service - Q&A on December 14, 2012

Hi Sam,
You can go with angled ceiling speaker for your high ceilings. The tweeters pivot in all of the speakers in this series, but the ICE870's will give you an additional 15 degrees. The key is aiming them directly at your listening area.
CL/MA 1466

By Nick C from Spring Hill FL on April 28, 2012
Looking to install a 7.1 system in a 17.5 X 12.5 room. Can I use 6 of these for my surround sound or do you recommend a different configuration? Also I live in single story house and my ceiling is open to the roof with only insulation between will I have a problem with sound loss? Was thinking of using Mineral wool to try and block sound any luck with that?
By Customer Service - Q&A on April 30, 2012

These should work perfect for you application the angle allows you to place the speakers closer to the wall above the Monitor for the left and right assuming you have a different speaker for the center channel (you can use a ICE870 for center channel as well, we sell them as each). They also work well for surrounds again allowing to be placed closer to the side walls. the center surrounds should be mounted to the left and right of your seating area and the rear surrounds placed four to five feet behind the seating area with the pivoting tweeter aimed at the seating location. The Mineral wool would help in the ceiling as long as it would not be shedding.

By Martin from oklahoma on June 21, 2012
I have a 20' x 18' living room. Do you recommend I go with the 6 1/2 or 8"? I have 10' ceilings. And is there a box for the ceiling speakers so attic insulation does not interfere?
By Customer Service - Q&A on June 25, 2012

Hi Martin,
You have a room that would be fine with 6.5" or 8" - I wouldn't say you need an 8" speaker but it wouldn't hurt, The BB8 back box will work with this speaker - Here is a link

By Nick C from Spring Hill FL on April 29, 2012
Do these accept 12G speaker wire?
By Customer Service - Q&A on May 1, 2012

Hi Nick:

The push terminals will accept 12 Gauge. We do sell a 12/2 CL3 rated speaker wire as well.


Product Reviews

Ceiling Speaker 8" MK Angled LCR Kevlar® Woofer MK870 Dolby Atmos® Ready
5 Stars based on 16 Review(s)
Tasmania, Australia.
5 Stars
I would recommend this item to a friend.

Best value and sound for not too much money!
July 23, 2013
I have used these speakers in numerous home theatre applications over the years and they never cease to amaze me! I have found though to get the best out of these speakers that if you can reinforce the ceiling above, by using a section of 20mm timber type sheet( mdf, ply etc) attached directly to the back of the ceiling and fastened to the rafters, you enhance the bass even more and take any buzzes out ,if your ceiling material is not so good. I have also now started to enclose the the back of the speakers, where space allows ,with any simple plastic bin or plant pot and glue and screw it to the timber ply. This keeps any crap from getting into the speakers and further enhances overall sound again!! Great Speakers!!
Excellent bass and overall sound quality. Good efficiency, no need to have huge amount of power, but more is always better!
Have had a few speakers that the fastening tabs have not worked properly. They could be a bit heavier duty! Thats about it!!
Best Uses:
Home theatre or anywhere you need a directional speaker.

Redmond Joseph
Renton, Washington.
5 Stars
I would recommend this item to a friend.

Best speaker for a good price
March 7, 2017
Easy installation. Bought 4 for seround sound system. They sound good.
Easy installation
Best Uses:
Watching movies on seround sound.

Northeast PA
5 Stars
I would recommend this item to a friend.

Great for atmos
March 6, 2017
Based on recommendations from other sites I purchased four of these and installed them in a drop ceiling. You will need to purchase grid reinforcers to use in a drop ceiling, the speakers are fairly heavy. They sound excellent. Outdoor speaker depot has a great website with lots of info. Shipping was immediate.
Great sound, beefy and well made, angled
As mentioned in other reviews the mounting screws suck. I stripped one beyond repair but was able to get a close replacement at the hardware store. Instead of a #1 phillips a better choice would be a square or hex head.
Best Uses:
Atmos, installations close to walls.

5 Stars
I would recommend this item to a friend.

Ceiling speakers
October 6, 2016
Great looking speakers and sounds great will buy again
Easy to install
Best Uses:
Dolby atmos

5 Stars
I would recommend this item to a friend.

A Quality Atmos Speaker
August 5, 2016
I was not familiar with OSD product but ran across their speaker in a recent search for atmos speakers. I was impressed when I open the box and looked at the speakers. They were built like a tank and really looked good. They perform as well as they look. I ordered 2 more in-ceiling and 2 in-wall. I am become a fan of OSD products.
Well built, great quality.
The MK 870 is heavy and thick. This should be strongly considered if installing these in a ceiling or drop ceiling. Pipes, Joist, heating ducts and electrical conduits may be in the way.
Best Uses:
They can be used to music, Dolby Atmos, Surround speaker in the HT.

Apex NC
5 Stars
I would recommend this item to a friend.

Excellent product.
October 6, 2013
Unbelievable sound and appearance.
Easy to install. Great sound quality.
Best Uses:
5.1 Home Theatre.

jdl the dr
Rockland County, New York
5 Stars
I would recommend this item to a friend.

Excellent speakers
February 12, 2012
I bought these for use as surround and rear speakers in a 6.1 set-up. I was worried that they did not state how large the magnet were or at least their power handling capability. I bought them based on other comments and the tech specs. I was not disappointed. I installed them in drop ceiling panels with ease. They are a little tall at 6 inches, in part due to the angle design that I wanted. You need to consider this in a drop ceiling because there are often obstructions above the panel. They installed easily. I used the cardboard holder to draw a circle on the ceiling panel, rather than the template, and cut a perfect fit. They sound fantastic and do not show any sign of strain at very high amplification. I have Legacy-audio Focus speakers as my front, so these are in the company of $6,000 speakers and work well. I have not tried them as mains.
Easy To Setup, Great Sound Quality, Easy to Mount, Attractive Design, Good Power Output
Best Uses:
Home Theater, Larger Rooms

Brentwood, CA.
4 Stars
I would recommend this item to a friend.

Great sounding and quality.....
October 10, 2011
As a previous reviewer posted, make sure to thread the screws in through the plastic they are set in before installing them and unthread it back to how they were. This way when they are getting installed you won't be fighting to thread the screws in and possibly drive the screw driver through your nice new speaker. Other than that, they are nicely made and sound excellent.
Attractive Design, Great Sound Quality, Easy To Setup, Good Power Output
Best Uses:
Home Theater

Huntington Beach, CA
4 Stars
I would recommend this item to a friend.

great speakers
August 21, 2011
The biggest flaw of this product is the mounting screws. The screws were VERY hard to turn. I even used a lubricant but still needed a lot of force and ended up stripping the screw heads. In hindsight, I should have taken the screws out first, then drilled the holes to make them a little bigger, then reinsert the screws.
Attractive Design

Pearland, TX
5 Stars
I would recommend this item to a friend.

Worked as advertised
July 28, 2011
The installation instructions were easy to understand and the installation itself took about 10 to 15 minutes per speaker, from cutting the hole in the ceiling to putting the cover screen on.
Great Sound Quality, Easy to Mount
Best Uses:
Larger Rooms, Home

Cleveland Heights, Ohio
5 Stars

I was a little worried ...
April 23, 2010
I was a little worried about buying speakers that I had not listened to. But I took the chance and man am I happy!! Not only was the price awesome the sound has my ht room rocking! I have 4 in the ceiling being pushed by the ONKYO TX-NR807 they sound great with my inwall MTX speakers as well. Great job outdoor speaker depot!

Falls Church, VA
5 Stars

Not only do they sound ...
February 7, 2010
Not only do they sound GREAT, they disappear into the ceiling. I can't say enough about the quality and construction of the speaker! I am installing a Niles ZR6 6-zone speaker system in my house and wanted to make sure I got the most sound from the receiver. ZR6 distributes 25 Watts per speaker x 12 speakers at 8 ohms each. The OSD-ICE870 was a PERFECT match since the speaker sensitivity is 92db. They produce BIG sound! I was amazed at the low frequency response and each speaker allows you to adjust the contour settings to fit the room size and material. Eight speakers installed so far and eight more to go. (You can easily connect two speakers together (providing 4 ohms resistance) if your receiver can handle it. This increases the sound level big time. Outdoor Speaker Depot was great to work with and prices were excellent when you compare what you get for the money. I have sent many friends to the site. Oh and remember these speakres are sold individually...of course I forgot and ended up with two shipments.

5 Stars

I have nothing but ...
October 6, 2009
I have nothing but outstanding remarks in reference to the 870 Angled Kelvar speaker. I built a sports bar approximately 1000 sq. ft. and I intalled 4 870 Angled speakers plus 1 center channel and 4 840's and the sound is outstanding. I put in a DD12 Velodyne sub along with Rx V2700 Yamaha and 555II Adcom amp,I can't keep people away. People love the sound, crisp, clean and tight. You can do much better than the 870 Angeled Speakers they are priced for a bargain. I purchased 13 speakers for additional rooms and outdoor patio. I love it. Great Job Outdoor Speaker Depot, not to mention their rock speakers for 3/4 acre yard, rock concert experience.

5 Stars

Started looking at OSD a ...
February 11, 2009
Started looking at OSD a year ago, but shipping prices were high. Product prices are fabulous, and shipping has now cfome down to very reasonable. Can't imagine why you would buy speakers anywhere else!!

5 Stars

These people are great! ...
December 16, 2008
These people are great! They have great products and are willing to work with you on the phone to make things right for you. I can't say enough good things about them. Excellent. Best prices also.

5 Stars

These speakers are great. ...
December 2, 2008
These speakers are great. I have used them in 3 seperate houses now with GREAT client reviews. definitely a great buy!