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    SKU: OSD-ACE400

    OSD ACE4003" Trimless Thin Bezel In-Ceiling Speaker Pair

    Purchase 3" Trimless Thin Bezel In-Ceiling Speaker Pair - ACE400
    • Outdoor Speaker Depot SKU: OSD-ACE400 acvipepa3ces
    • In Stock


      Compare at: $59.99
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    Add the ACE400 in every room in the house and you'll still have money left over to throw a big party! About the size of a light can, ACE400 offers impressive sound for its small size and price. Part of our Architectural Ceiling Element, this speaker includes micro-flanged grilles with a very thin trim line, about .15". The ACE Series comes in every price point, from our very lowest like the ACE400 you see here, to our top-of-the line 8" trimless thin bezel Spitfire ceiling speaker. Sold in pairs, the ACE400 is a great speaker for large areas where you need a lot of speakers but don't have an endless budget. This speaker is rated at 60W with a 3" woofer, so it's best for background music; however, in spite of the low price, customers often compliment us on the very solid sound the ACE400 in-ceiling speaker provides.

    Why Go Trimless?
    It's really a matter of aesthetic preference. These flush mounted speakers are hardly noticeable; that is until they're playing. Our Architectural Ceiling Element (ACE) Trimless speakers do not include the 3/4-inch trim you typically see around in-wall and ceiling speakers. 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.

    How Does this Speaker Mount in the Ceiling?
    Customers often ask us if they need special installation mounting brackets on their OSD ceiling speakers. The answer is no and here’s why. All our in-ceiling speakers feature a dog leg (L-shaped) mounting system that is part of the frame. Before you install the speakers, remove the grille and you’ll see several the mounting screws near the front frame. These screws need to be loosened to activate the dog leg clamps. Use a screwdriver to loosen (turn to the left) these screws and the clamp will come loose. When the speaker is in position in the ceiling, tighten (turn to the right) the screw and the speaker will be secured to the ceiling.

    What Type of Speaker Wire and What Gauge?
    Wiring is not included with in-ceiling speakers so you will have to purchase some. We recommend our OSD Audio CL3/FT4 cable that is UL (fire) rated for in-wall and outdoor speaker installs. This type of 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. As for the gauge, for runs up to 100 feet for background music, 16-gauge will be fine. If the run is approaching or exceeding 100 feet, we suggest 14-gauge wire. 

    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.

    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.

    Warning: California's Proposition 65


    This product can expose you to chemicals, including vinyl chloride, which is known to the State of California to cause cancer. For more information, go to

    • Speaker Type: 3" Trimless Ceiling Speakers
    • Woofer: 3" Polypropylene Cone
    • Frequency Response: 120Hz - 20kHz
    • Power Handling: 60W
    • Sensitivity: 88 dB
    • Impedance: 8 Ohms
    • Spray Paintable Magnetic Grille Included
    • Inputs: Spring Loaded Binding Posts
    • Install-friendly Dog Ear Installation Brackets
    • Diameter & Depth: 5.62" x 2.25"
    • Cutout: 4.5"
    • Sold As: Pair
    • Warranty: 10 Years
    13 Questions asked
    Have a Questions?

    What's on your mind?

    Larry • 12/17/2019, 2:17:43 PM Anybody using these as rear channel speakers for a home theater? I am thinking about placement in the ceiling directly above the seating area.
    Customer Service • 12/17/2019, 2:17:43 PM
    Hi Larry, We recommend placing the speaker at least a foot behind your listening area (if there is room). We also recommend going with at least the ACE500 or ACE520 both which feature a dedicated pivoting tweeter which can be aimed towards your listening area. The ACE400 is a dual cone design with no tweeter and might not have the clarity to really reproduce the surround channel information to its fullest. Note both the ACE500 and ACE520 cost a bit more but do feature free shipping. TL/MA - 1568
    Brett • 12/17/2019, 2:17:43 PM I know this says trimless but one of the product photos show's a trim plate. I'm installing these into acoustic ceiling tiles, so a trim plate would be nice since it's impossible to get a clean cut in the tile. Let me know thanks.
    Customer Service • 12/17/2019, 2:17:43 PM
    Hi Brett The cutout for the ACE400 trimless ceiling speaker 4 5/16" and the outer dimension of the speaker is 4 5/8". You have 1/8 inch covering the opening so you should be fine. CL/MA 1632
    james • 12/17/2019, 2:17:43 PM When will you have the Ace400 back in stock? I have been waiting for 60 days, the info on the web said that you will have them 4-30-13
    Customer Service • 12/17/2019, 2:17:43 PM
    Hi James, Thank you for your patience. The ACE400 will be available in about 3 weeks. June 22nd is our new ETA. CL/MA 1906
    James Nelson • 12/17/2019, 2:17:43 PM I am trying to fill a whole 53/4 in diameter from a previous speaker that was taken out. Will this speaker work?
    Customer Service • 12/17/2019, 2:17:43 PM
    Hi James, The cutout on this speaker is 4 5/16" in diameter. Hope that helps. -BM
    Cesar • 12/17/2019, 2:17:43 PM Are there new-construction brackets available for these speakers?
    Customer Service • 12/17/2019, 2:17:43 PM
    Hi Cesar, unfortunately, we do not have a new construction bracket for the ACE400. CS 2476