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Home / Product Category / SPEAKERS / Ceiling Speakers / 6.5" In-Ceiling Speakers / ACE670 Angled Invisible Trimless LCR Ceiling Speaker with 6.5" Carbon Fiber Woofer, Dolby Atmos® Ready (Single Speaker)

ACE670 Angled Invisible Trimless LCR Ceiling Speaker with 6.5" Carbon Fiber Woofer, Dolby Atmos® Ready (Single Speaker)

Product code: ACE670

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Features & Specifications

With the ACE670 Trimless in-ceiling LCR Angled speakers, you'll get imaging and staging that would be lost with regular down-firing in-ceiling speakers. Features include a sturdy 6.5” Carbon Fiber Woofer fixed at a 15° angle, a 1” Aluminum Dome Tweeter, and a 90W power handling. You can even use them for Dolby Atmos front, rear and side surrounds in a 5.1 or 7.2 ystem. Contour switches also allow you to tailor the bass and rebel to your preference.

What Are the Benefits of an Angled In-ceiling Speaker?

The Angled speaker is a real problem solver because not every space is ideal for custom home theater sound applications. The Angled in-ceiling speaker features a 15° 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-ceiling closer to the wall just above the monitor. This creates a more realistic sound image when compared to normal in-ceiling speakers that are mounted 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

The Trimless Design is a Nice Touch
The Architectural Ceiling Element (ACE) Trimless thin bezel in-ceiling and in-wall speakers are a great choice for new construction or retrofit. These flush mounted speakers are hardly noticeable; that is until they're playing. The micro flange grilles are attached by extremely powerful magnets that stay put for quick and easy installation. Adds less visual impact on your architectural audio installation.

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 foam at 12 to 15 years.

Should I Purchase Special Cable for In-ceiling Speaker?

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 can’t 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 in-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-wall or in-ceiling. Uninstalled in-wall/in-ceiling speakers will sound weak and "tinny" without the proper enclosure (in this case your home walls) 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

Introducing LCR Angled in-ceiling speakers with revolutionary designs for imaging and staging that would be lost with regular, down-firing in-ceiling speakers. We accomplish this with our woofers set at a fixed 15° angle. The critical high and mid-range frequencies are then pointed toward the listener, not the floor. So, when your video tracks left to right, the sound tracks right along with the video. You can even use them for rear and side surrounds in a 5.1 or 7.1 system.


  View Owner's Manual          


21 Questions & 23 Answers
from new orleans asked:
October 26, 2019
Is this an outdoor speaker?  Being from OUTDOORspeakerdepot one would assume, but it never says that.  please confirm.
1 Answer
Hi David:

The ACE670 is an angled in-ceiling speaker ideal for Custom Home Theater applications. It is not a weatherproof speaker. We do offer dedicated weather-resistant in-ceiling speakers in both a Stereo Pair and Single Stereo Dual Voice Coil under our WRS series (Weather Resistant Speakers). They feature rust-proof aluminum grills. The WRS series speakers all feature Standard Frame design. We do have a step-up line of speakers that features the Trimless grill design. Check out the OSD Black Series( R62SM, R82SM, and R62SS. The SM stands for Shallow Mount (2.75"), and SS stands for Super Shallow (less than 2" in-depth). All three models are weather-resistant. Typically we recommend using our outdoor patio speakers like our AP-650 when looking for speakers to use with an outdoor television application.


Submitted by: Tim Leahy on October 28, 2019

from Bella Vista, Arkansas asked:
July 22, 2019
Can the speaker grill be painted?
1 Answer
Hi Paul:

Yes, the speaker grill is paintable. There is an acoustic transparent cloth glued to the inside of the grille that you must remove before you paint. I have heard people recommend using spray paint and make sure the perforated holes. You may also use a sponge brush if using a particular color-matching paint. I would also ask at the paint store for additional tips. The speaker grilles are powder-coated steel that is held in place by a group of powerful neodymium magnets.


Submitted by: Tim Leahy on July 25, 2019

from Michigan asked:
February 20, 2019
I am building a 7.1 theater system. My room is a approx 17' x 15' x 9' ceilings. my seating distance will be approx. 10' from the screen. I am going to use the ACE870's for the LCR and was planning on using the ACE670's for the 2 rears. Should the ACE670's be used for the side speakers? or is there a better version of these that should be used maybe a straight down version instead of angling them?
2 Answers
Hi Philip: The angled ACE870 is an ideal choice for the Front Stage LCR speakers. The angled ACE670 is an excellent choice for Surround and Effects speakers. The key is the Angled speakers provide a broader dispersion pattern versus a straight down firing speaker. It allows you the ability to aim the Tweeter directly towards the ideal listening/viewing seating area. You can also locate it closer to an adjacent wall (within 1.5 ft versus a minimum 3 feet for straight down firing speakers). So the ultimate goal is to have the Tweeter of all speakers facing your ears. Check out any Home Theater diagram in any AVR owners manual. All speakers are typically floor standing or Bookshelf speakers on stands, all on the same plane with Tweeters at the same level. But the reality is most Home Theaters do not use a bunch of floor standing speakers with wires running everywhere. Good choices TL/5420
Submitted by: Tim Leahy on February 21, 2019
Hi Philip: I am a huge proponent for Angled speakers for both Front Stage LCR (The 8" ACE870, the bigger, the better) and Effects speakers for surrounds (Rear, Sides or Height for ATMOS or DTS:X). The key for Angled in-Ceiling speakers for Home Theater is the flexibility to find multiple choices for mounting. The angled speaker provides a broader dispersion cone than a straight down-firing speaker. You will see most if not all Home Theater diagrams from the Audio Video Receiver suppliers show floor standing or bookshelf speakers on stands as the optimum setup. The common theme has to do with the level of the tweeter being at ear/eye level. These are the ideal setups but not practical for most customers actual application based upon room size, TV location and for the ideal seating/viewing area location. The In-Ceiling angled LCR speaker created for those applications where an in-wall or box speakers would not work. A speaker located above a Fireplace Mantel is a good example where there is no accessibility for wiring or mounting a speaker. So just like the angled LCR speaker that allows you to place the Ceiling speaker closer to the TV wall, the angled speakers work well for the Surround and Effects. Typically this does not need as broad a Frequency Response as the front stage so the smaller more affordable speaker will work just fine. So the key is finding the right location for the speaker, so the tweeter of the angled speaker is facing at that optimum seating and viewing area. I also support running a 5.2.2 DOLBY ATMOS system at a minimum. Good choice on the ACE870 and ACE670 TL/5420
Submitted by: Tim Leahy on February 21, 2019

from Michigan asked:
February 18, 2019
What ceiling construction mounting bracket will work with the ACE670?
1 Answer
HI Phil: We have a New Construction Bracket under our Black Series line that will work for the ACE670; The ACE670 has a cutout hole of 8 1/8". The NC6A cutout diameter: 8.3". It will work with the ACE670. You will need to contact our Customer Service department (562-697-2600) for the price. Let them know it is for the ACE670. The NC6A sell in pairs. TL/5417
Submitted by: Tim Leahy on February 21, 2019

from Buckeye,Arizona asked:
December 4, 2018
I wish to do Dolby Atmos 7.1. I am looking at the IW550LCR for center and ACE870 for fronts and 4 ACE670 for surround and height. Will the center being located at listening level while the fronts at ceiling level be a problem? My ceilings are 10'. Would it be better to do 3 ACE 870 in the front?
1 Answer
Hi Tim: The ideal setup is to utilize three of the IW550LCR as your front stage if you can do so. The Angled In-Ceiling speaker originally was created for applications where the only the front stage option was going in-ceiling. The reality is the angled speaker not only works very well for front stage applications but provides an excellent choice for Surrounds and Effects. We push the ACE870 for front stage and the ACE670 for the Surround and Effects options. Either application will work for you, but I think the three IW550LCR would be our first choice. TL/ 5316
Submitted by: Tim Leahy on December 6, 2018

from UK asked:
September 27, 2018
Hi, Some of the questions relate as to whether the speakers are in stock. I am able to place the speakers in my basket; could you please confirm if they are, or are not in stock for purchase. Thanks, Mark
1 Answer
Hi Mark: These recently came in from our factory. They are sold as each. We have plenty in stock (as well as the ACE870 8" version). TL/5219
Submitted by: Tim Leahy on September 27, 2018

from Atlanta, GA asked:
May 29, 2018
OSD states a 3 cubic foot box or larger is required when demoing this speaker. You state that a 1-1.5 cubic foot box should suffice for installation. I’m confused as to the size of box I should build or whether I should forgo the box altogether and simply protect the speaker with some denim insulation. What would be optimal? Any thoughts would be appreciated.
1 Answer
Hi Andrew: 1.5 would be fine for your application and when you add fiberfill to tune the box the more fiber you add the more the low frequencies are absorbed making the speaker think it is working in a larger box. The 3.0 cubic box they referred to was if you were building a box to demo or listen to the speaker before you mount the speaker in the Ceiling/wall (not sure why you would do that). Note the woofers in most In-Ceiling and in-wall speakers feature an infinite baffle so it adjusts to whatever size enclosure it is placed in (Just like a car speaker using the trunk). In most in-ceilings, it is in a ceiling joist cavity. In this case, if you are putting a right and left speaker in the same joist cavity you would want to isolate the two. Also, not everyone has an open wall or ceiling with access to build an enclosure. Sorry for the confusion... TL/5013
Submitted by: Tim Leahy on May 30, 2018

from Sioux Falls, South Dakota asked:
February 12, 2018
When will these speakers be back in stock?
1 Answer
Hi Timothy: It will be a while before the ACE670 and ACE870 will be back in stock, that is the bad news the good news we have something similar available to you. Checkout, and look for the Black Series specifically the R63A with the Metal dome tweeter or the R62A with the soft dome. There is also a 8" version as well (like the ACE870) the R83A or soft dome R82A. You will need to contact customer service directly at OSD for a quote. The Black series is a full line of architectural speakers featuring a good, better and the best option. 1-562-697-2600 (sales). TL/4796
Submitted by: Customer Service - Q&A on February 13, 2018

from Ohio asked:
December 14, 2017
are the grills held on by magnet?
1 Answer
Hi Westy: Checkout the picture of the backside of the ACE670 and you will see 7 of the 10 small Neodymium Magnets mounted into the frame. These do a great job holding the grill in place. TL/4692
Submitted by: Customer Service - Q&A on December 14, 2017

from Phoenix, Arizona asked:
November 17, 2017
I will be installing the ACE870s as LCR in the ceiling above my TV. Can I use the ACE 670s at the rear speakers installed in the side wall of the room for a 7.1 system? The room is rather small 12 foot between the two side walls. Or would you recommend some other models?
1 Answer
HI Paul: The ACE670 would be perfect for your application. I would recommend putting the three ACE870 in the ceiling above the TV angled down towards the viewing area and then a pair of the ACE670 in the wall that extends from the overhang. Those would be the front ATMOS effects speakers. The second pair I would put in the back wall aiming down (not sure you have access to that wall. These would be the Surround speakers. Depending on your receiver this would be a 5.1.2 system. I will send you your images with locations I am talking about. Look for an email from Note, we also have a Square grill kit option for the ACE670 that might look better on the wall as well. I will send info on that. Good luck... TL/4654
Submitted by: Customer Service - Q&A on November 24, 2017

from Richmond, Virginia asked:
November 13, 2017
I am setting up my home theater in a ATMOS 5.1.2 configuration. I have Polk RT Front Right, front left and center channel. My AVR is an Denon AVR-X2400H. Would the ACE670 speakers work well for the ATMOS and rear surround? The room is open in the back so I need to place these speakers in the ceiling. I am concerned with using this as surrounds since the Dolby recommendation is to be at ear level. Would I angle all the speakers toward the MLP? Thanks for your insight.
1 Answer
HI Jeff: These ACE670 Angled LCR, Surround and Effects speakers are the perfect speaker for your application. Because of the 15 degree angle and extra 5% swivel of the tweeter it gives you flexibility in where you need to mount them. What Dolby is looking for is to have the Tweeter of each speaker aiming directly at the optimum Viewing/listening area. So both the speakers for ATMOS which will be mounted between you and the front speakers and the Surround speakers which will be behind your seating area can be placed in such a way so that Tweeter is aiming at that optimum site. It is the best choice for an application calling for ceiling speakers. A great selection. TL/4645
Submitted by: Customer Service - Q&A on November 16, 2017

from texas asked:
March 22, 2017
What is recommended enclosure volume and amount of polyfill for said enclosure? I am installing in-ceiling w attic access and a speaker box is a must.
1 Answer
Hi Brian: Probably one to one and half cubic foot will work and then you can experiment in how much fiber fill you will need. The fiber fill makes the box appear bigger depending on how much you use. These woofers are infinite baffle so they can work in a broad range of enclosures. The box will definitely add to the speakers performance. Great choice for LCR, Surround or Effects (ATMOS or DTS:X) speaker. TL/4263
Submitted by: Customer Service - Q&A on March 25, 2017

from Tucson, AZ asked:
May 26, 2016
Can the ACE670 be used of Dolby Atmos even though it does not specifically state that it's Dolby Atmos Ready? Would it be best to use one of those listed as Atmos Ready?
1 Answer
HI JR: This speaker is an excellent choice for your application. They are brand new in our catalog and we have not listed them yet as Dolby ATMOS. They exceed the current DOLBY ATMOS specs and with their angled design (15 degree with additional 5 degree for the pivoting tweeter) you will have more options for speaker placement. We now are recommend the ACE-870 for front Stage LCR and the ACE-670 for Effects (DOLBY ATMOS & DTS:X) and Surround In-ceiling Speakers. Great Choice TL/3899
Submitted by: Customer Service - Q&A on May 26, 2016

from Virginia asked:
March 18, 2018
So, are we still talking about a long time to get these back in stock? I asked in another area about the best speakers for my 7.2 setup and was pointed to these although I am not sure why as it seems they are basically unavailable. If you have any idea of when they might be coming please let us know. I need to either wait or go elsewhere. I love OSD stuff but can't wait forever.
1 Answer
HI Tony: We do have an alternative, our Premium OSD Black Series. The Point 3 series R83A and R63A have the Ceramic Coated Aluminum metal dome tweeter with Carbon Fiber Woofer and the Point 2 Series R82A and R62A features Parachute Silk Soft Dome Tweeter with Graphite Mineral filled Woofer cone. Typically we recommended the ACE870 (8.0" 2 way angled speaker) for the LCR Left, Center and Right front stage speakers and the ACE670 (6.5" 2 way angled speaker) for the surround/effects speakers. Check our OSD Audio Premium site. There is no pricing on our site but we can provide a quote and help with the setup. my contact is Note: The ACE870 and ACE670 have been ordered and should be in stock hopefully no later than mid May 2018. TL/4851
Submitted by: Tim Leahy on April 1, 2018

marlon rea
from Toronto, ON asked:
January 26, 2018
Hello, I am looking for a speakers for a 5.1 surround sound system I will be installing within my home. The room is rectangle and roughly 25 x 15. I was thinking of the ACE670 6.5 or should i go with an 8 inch. Also looking for some back ground music speakers for my kitchen area which is open to a large room.
1 Answer
Hi Marion: Both the ACE670 and ACE870 are currently out of stock. We usually recommend the ACE870 for LCR, Left, Center and Right front stage and then using ACE670 for Surround Rear and Height/Effects speakers depending on whether you add for Dolby ATMOS or DTS:X. It does depends on your Receiver which I am assuming is at least a 7.1 (more than 5 years old) or 7.2. Checkout the Premium Audio web site and checkout the Black Series R83A/R63A or the more affordable R82A/R62A. These are in stock, but you must contact customer service to get a quote. TL/4772
Submitted by: Customer Service - Q&A on February 5, 2018

from Hartselle, AL asked:
January 12, 2018
I am installing MK870 as the front right, center and left speakers in the ceiling. The ceiling is 12 feet high. How would these work as the rear speakers or should I go with the same speaker (MK870) as the rear speakers?
1 Answer
HI Ron: Typically we recommend using the Angled 8.0 Inch LCR speakers for the Right, Center and Left front stage speakers. Then we recommend using angled 6.5" for Surround and Effects speakers (ATMOS or DTS:X). I believe we are out of stock on the MK870 (which I believe are being discontinued) since most of the demand is for trim less versus the standard frame of the MK series. But we may also be out of the ACE670 and ACE870. So I will need you to contact Ed our internal sales manager to talk about a substitute for the Angled 6.5 inch ACE670. TL/4744
Submitted by: Customer Service - Q&A on January 18, 2018

from Bklyn, NY asked:
November 13, 2014
I am the process of putting together a 7.1 home theater system in my basement, the room size is L 20'xW 12'x H 6.5'. Which if the speaker would best suit for rear surround, the ICE670 or the MK670
2 Answers
Hello, Both are similar speakers in that they are 6.5" angled ceiling speakers intended for surround sound. The MK670 is the better of the two.
Submitted by: Customer Service - Q&A on November 26, 2014
Hello, Both are similar speakers in that they are 6.5" angled ceiling speakers intended for surround sound. The MK670 is the better of the two.
Submitted by: Customer Service - Q&A on November 26, 2014

from Milton, Ontario asked:
October 18, 2014
When building a 5.1or 7.1 in a 9ft ceiling which speaker is better, the ICE670 or MK670? Both have good features but I am unsure which to purchase. I would like ultimate performance for watching movies and sports. Thanks.
1 Answer
Hi Rob, The MK670 is a higher-definition speaker and is on special right now. Thanks!
Submitted by: Customer Service - Q&A on October 20, 2014

from Lumberton, TX asked:
August 27, 2013
Is there a maximum ceiling height that you recommend these being installed on? I've got high ceilings (12-ft) in my living room and I'm afraid they'll be too high. Also, should all of the insulation in the ceiling (cellulose) be kept away from the speakers after installation or can it be put back on top of the backside of the speakers without affecting the performance?
1 Answer
Hi Brandon, For 12ft ceilings, I would recommend going up to the ICE870 angled speakers. I would keep a space clear in the insulation above the speaker to be safe. Thanks. -BM 2179
Submitted by: Customer Service - Q&A on October 15, 2013

from Baton Rouge, LA asked:
April 6, 2013
Do the ICE670 speakers have the same cut-out template dimension as the ICE650 type speakers?
1 Answer
Hi Cory, The ICE650 and ICE670 ceiling speakers have the same cutout: 8 1/4" CL/MA 1771
Submitted by: Customer Service - Q&A on April 9, 2013

from Los Angeles asked:
February 9, 2013
I plan to use these for LCR .... for the rear surrounds ... should I use this and angle it towards the center sofa position, or the ICE650 and have it shoot straight down?
1 Answer
Hi Daniel, Great choice! We suggest the ICE650s if you are able to mount the speakers within two feet (in either direction) directly above your seating area. You can use the angled speakers if you have to mount the speakers farther back. Most customers will use three angled speakers in the front directing the sound toward the couch and a down firing pair for the rear surrounds, such as the ICE650 right above the seating area. CL/MA 1615
Submitted by: Customer Service - Q&A on February 11, 2013

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