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Home / Product Category / SPEAKERS / Ceiling Speakers / 8" In-Ceiling Speakers / ACE870 Angled Trimless LCR In-Ceiling Speaker 8" Carbon Fiber Woofer, Dolby Atmos® Ready (Single)

ACE870 Angled Trimless LCR In-Ceiling Speaker 8" Carbon Fiber Woofer, Dolby Atmos® Ready (Single)

Product code: ACE870

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OSD Price: $119.99
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Features & Specifications

There’s a reason our ACE870 has so many rave reviews, customers love the look, sound, and power of this heavy-duty Atmos-ready home theater ceiling speaker. Designed for High-End Audio systems, larger Home Theaters, or Commercial spaces such as Bars or Restaurants. The ACE870 can handle up to 175W of power so you can push volume levels without any sign of stress. Contour switches also allow you to tailor the bass and rebel to your preference.

The beauty of the ACE870 is in the design. The Mid-Bass driver is angled at 15°, which gives you more placement flexibility than standard in-ceiling speakers. This makes the ACE870 ideal for Dolby Atmos Surround Sound systems since you can place the speakers in multiple places to create an all-enveloping 3D sound experience.

In addition to crisp, detailed mid and high frequencies, this single in-ceiling speaker kicks out impressive bass due in part to the 8” Carbon Fiber Composite Woofer and heavy-duty and efficient magnet structure that focuses energy within the voice coil gap. Other Audiophile features designed into the ACE870 include front-mounted contour switch as well as Butyl rubber surround that gives the speaker more excursion capability for deeper bass and wider frequency response. The ACE870 installs easily into ceilings with four easy-to-lock-in dog-eared brackets and includes a cut-out mounting template.

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.


Other Product Info

What Are the Advantages of Angled In-Ceiling Speakers?
Not every room or space is the ideal setup for custom Home Theater sound applications. When traditional in-wall or on-wall speakers are not practical or even possible, in-ceiling speakers can be a great alternative. Typical down-firing in-ceiling speakers aren't noticeable in a LCR (front stage) setup due to the speaker needing to be installed away from the wall to avoid sound reflection. This can create a disconnect between the screen and the sound coming from the speakers. An Angled speaker can be installed closer to the wall, just above the screen, and the speaker assembly can be aimed toward the listening area. The Angled design is also ideal for a Dolby Atmos down-firing speaker setup where overhead sound is an essential part of the 3D experience.


  View Owner's Manual          


14 Questions & 14 Answers
from caldwell, ID asked:
February 16, 2019
i was looking at your pre amp but it doesn't except enough inputs and i would like to be able to chose to send signal to two power amps when i want to. These are the components i have, Item Code: OSD-AMP300 and two Item Code: OSD-TSM8. Do you have any suggestions where to shop? or what to put in my search query? i don't care about recording or adjusting the highs mid or base. thank you for any help you can give.
1 Answer
Hi Sonya: So far I know you have a single OSD AMP300 connected to two TSM8 speaker Selectors. You also state that the OSD Pre-One Preamplifier does not have enough inputs (1 phone only and three others). How many sources in total do you have and what are they? Are you using Speaker A for the first TSM8 and Speaker B for the second TSM8? I could better answer your question with a little more information. Have you thought about adding a second OSD AMP300, so you have one amp for each TSM8? That will give you four source inputs total (two each amp; automatic source switching). Please let me know more? TL/5414
Submitted by: Tim Leahy on February 17, 2019

from Milwaukee. WI asked:
December 8, 2018
What is the ohms of the ace870 ?
1 Answer
Hi Leif: The impedance is 8 ohms just like the 6.5" ACE670. Thank you for pointing that our, we will get that added to the bullet points of the ACE870. A great speaker, by the way, ideal for front stage LCR while the ACE670 is the perfect match for Surrounds and effects speakers TL/5323
Submitted by: Tim Leahy on December 9, 2018

from Buckeye, Arizona asked:
December 4, 2018
Do these ace870 speakers perform better in backer box’s? I have seen on the internet that some speakers have better bass response without boxes. My house has foam insulation on the inside of the roof so I don’t have a problem with insulation in contact with the speaker. I read where you recommend boxes to someone else. Have you tested with and without boxes?
1 Answer
Hi Tim: These speakers feature a free air woofer that adapts to the cavity where it is mounted, whether just an area between two ceiling joists or a section reinforced with a custom enclosure. It sounded like you are cutting a hole in a finished ceiling, but worried about the insulation already in between the joists. The perfect solution for this is a product from OEM systems that cover over the back of the speaker. Here is a link for you to check it out: On-line shipped from San Diego; This cover provides the protection you are looking for in your application. I have not heard the speaker with a back box. Good Luck TL/5317
Submitted by: Tim Leahy on December 8, 2018

from Virginia asked:
October 26, 2018
What construction bracket fits the ace870?
1 Answer
Hi Jack: Our BK-NC8A will work on the ACE870. You will need to customer Service/sales for a price on the New Construction Bracket that is sold as each just like the ACE870 angled 8" in-ceiling speaker. TL/5261
Submitted by: Tim Leahy on November 2, 2018

Tim Hoiwell
from Orange Beach, Ala. asked:
October 23, 2018
I'm going to have an outdoor system under my patio/carport at the beach location. Will these speakers do well in that type of environment?
1 Answer
Hi Tim: Our WRS series Outdoor speakers would be better suited for your application. They are weatherproof and feature rust proof Aluminum grills. The ICE840WRS and ACE640WRS are the upgrade models featuring 12 dB per octave second order crossover networks. Both are so popular we are sold out but are expecting a new shipment in November. Note, the angled ACE870 LCR speakers are ideal for an interior custom home theater. Typically customers use patio speakers for outdoor custom home theater (featuring a surround Receiver) or for playing sound for their outdoor TV. Good luck TL/5257
Submitted by: Tim Leahy on October 24, 2018

from Ohio asked:
October 6, 2018
What's magnet size?
1 Answer
HI Brian: The first time somebody asked me a question about the Magnet size of a speaker since my Car Audio days over 15 years ago. I asked the factory, and they responded with dimensions 4" outer diameter by .69" depth. We typically referred to the magnet size by weight. I think the magnet is 20 Ounce. TL/5231
Submitted by: Tim Leahy on October 12, 2018

lee edger
from Arizona asked:
February 16, 2018
can i use use osd ace870 for all my in ceiling speakers meaning L/R center and surrounds
1 Answer
Hi Lee: Sure you can, the front stage is most critical so the Left, Center and Right (LCR). You can look to the ACE670 for the Surround and Effects speakers. You definitely will want to look for at least a basic DOLBY ATMOS setup. ACE870 for the LCR, ACE670 for the Surrounds and a pair of ACE670 for the Height/ATMOS. Look for a Receiver that does both ATMOS and DTS:X. The ATMOS setup will work for both. You can easily find a receiver for $400 and up for a 7.2. Also think about utilizing two subs for the optimum coverage. The ATMOS system would be a 5.2.2 system. 9.2 Receivers would add a second pair of Height speakers for a 5.2.4 system. Your surrounds would be off to the left and right of the optimum seating location with front height speakers between the Front stage and seating location and the second pair behind the seating area. There is also a 7.2.2 option as well with the 9.2 which starts at $1300 plus and the 11.2 another $1000 above that. Let us know if we can custom design a system for you. TL/4804
Submitted by: Customer Service - Q&A on February 16, 2018

from Usa asked:
March 15, 2017
Hello. I have a 7.2 system mapped out. I am not sure what exactly is being said on one of the q&a Would you not suggest using 7 of these speakers? I should be looking at these for mains and a different model for center and surrounds? Thanks
1 Answer
Hi Craig: These speakers were created as Front Stage LCR speakers Left, Center and right. But they also work very well as both surround speakers and effects (like ATMOS or DTS:X). The key to any home theater system is the placement of the speakers so you can aim all the tweeters directly to the optimum viewing and listening area. We would recommend using the ACE870 for your front speakers and the ACE 670 for your Surrounds and Effects speakers. The question I think you were referring to was regarding an older speaker the ICE 870 and ICE 850 TL/4253
Submitted by: Customer Service - Q&A on March 15, 2017

from MO asked:
September 28, 2017
I have a Marantz sr6011 9.1 atmos enabled receiver, Klipsch Reference Premiere speakers including one set of Klipsch RP 140-sa Dolby enabled speakers. I would still like to add ceiling dolby atmos alon gwith my Dolby enabled speakers. Considering I have a have a high end system, do you feel these speakers will complement the system I already have. The price is certainly right. Just want to make sure they will complement my system.
1 Answer
Hi Don These would be perfect match with your Reference series speakers. Both feature metal dome tweeters. The ACE are 92 dB sensitivity and KLIPSCH are at 97dB. So you would haved to raise the volume levels up on the ACE speakers. You could get away with the ACE670 if you wanted to save additional dollars. Most of the up firing Dolby Atmos speakers are 3.5" full range drivers. Good choice TL/4571
Submitted by: Customer Service - Q&A on October 3, 2017

Idilio Gonzalez
from Miami, FL. asked:
April 6, 2017
Can these be ceiling mounted on a outdoor terrace? I know you have an outdoor line of speakers, but there seem to be more options and maybe even quality on those that are not outdoor rated by your website.
1 Answer
Hi Idilio: These are an excellent choice, you can mount these in your application but you want to take some precautions where you might want to weatherize it your self including putting a bead of silicon on the back of the mounting flange and maybe covering some of the exposed metal components on the back side around the input terminals and crossover parts. This is a great speaker... TL/4294
Submitted by: Customer Service - Q&A on April 12, 2017

from Richmond asked:
May 17, 2016
I have 7.1 system and wanted to use these all around due to the lack of good wall locations. Can I use one of these for the center, or is there a better option?
1 Answer
HI Jack: These are an excellent choice. The angled speaker was first created as an LCR front stage solution. But the angled speaker provides more flexibility for ceiling placement for Rear Surrounds, Center Surrounds and Atmos/DTS:X Speakers. The key to any in-ceiling speaker setup for Home Theater is to have the ability of aiming the tweeter directly at the optimum viewing/listening area. The 15 degrees of the mid woofer plus the 5 degrees for the pivoting Tweeter providing 20 degrees total.These new top of the line ACE-870 feature the same Kevlar cone and metal dome tweeter as our MK series with the new perfect edge Trim-less grill design (held on by multiple extra strength magnets). And yes one of the speakers will work fine as your center channel. TL/3886
Submitted by: Customer Service - Q&A on May 17, 2016

from TN asked:
January 15, 2013
I'd like to build a back box in the ceiling for the ACE950 speaker. What size box should be built for the ACE950? Thanks.
1 Answer
Hi David, A back box is always a good way to go if you have accessibility and the room for a box. These speakers are designed to work in a wide range of enclosures so it is not critical to have a dedicated enclosure size. So your enclosure size should be roughly double the size of the speaker box it came in. Again you are at the mercy of the ceiling you are installing these in as far as space available. You also might want to pickup some fiber fill (material used for pillows) and use this to tune the speaker once you have built your enclosure. The more fiber fill you add, the more you "fool" the speaker into thinking the enclosure is larger. I hope that helps, feel free to call us for further clarification. There is plenty of information on Google for building enclosures (YouTube as well). Good luck TL/MA - 1545
Submitted by: Customer Service - Q&A on January 20, 2013

from florida asked:
January 16, 2012
1 Answer
Danny, Excellent clear, crisp sound quality with the Kevlar material making up the ACE950. This 9" speaker will not let you down when it comes to bass response either. Defiantly a great choice for serious home theater systems with its trim less design! CL
Submitted by: Customer Service - Q&A on January 16, 2012

from florida asked:
January 16, 2012
any suggestions for a center chanell,ceiling mount speacker
1 Answer
Danny, At this time we currently don't have an in ceiling center channel. Sometimes its great to do 3 angled for your front and a regular pair for your rear like 3-ICE870's and 1-ICE850 but -in that 9", in the trim less we do not have a matching in ceiling center channel or angled speaker. CL
Submitted by: Customer Service - Q&A on January 16, 2012

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