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    SKU: ACE640TT

    OSD ACE640TT6.5" Trimless In-Ceiling Speaker 120W Stereo Dual .5" Titanium Tweeters (Single)

    Purchase ACE640TT 6.5" Trimless In-Ceiling Speaker 120W Stereo Dual .5" Titanium Tweeters (Single)
    • Outdoor Speaker Depot SKU: ACE640TT ace640tt
    • In Stock


      Compare at: $103.99
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    The ACE640TT offers exceptional stereo sound while taking up half the space of traditional speaker pairs. Designed for whole house audio applications, this speaker is perfect for rooms where space is limited. With a 6.5" fiber glass cone woofer and dual .5" titanium coated dome tweeters, the ACE640TT delivers smooth and powerful 2-channel sound with a frequency response of 45Hz - 20kHz. With a power handling of 120W and dual voice coil technology, this speaker provides stereo sound within one unit. The install-friendly dog ear installation brackets make it easy to install, and the speaker comes with a 10-year warranty. If you're looking for a high-performance speaker that delivers outstanding sound in a compact package, the ACE640TT is the perfect choice.

    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.

    What Is a Dual Voice Coil Ceiling Speaker?
    A Dual Voice Coil (DVC) Ceiling Speaker uses a special voice coil cone design that allows both channels of a stereo system to drive one cone. Sounds complicated but it's not. Basically, a DVC speaker plays both right and left channels through one speaker cone. You get both channels but without the acoustic separation that happens with two speakers. There are places like bathrooms, closets or hallways that just can’t accommodate multiple speakers, so a DVC speaker solves the problem and produces great sound.

    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: 6.5" DVC Dual Tweeter Trimless Ceiling Speaker
    • Woofer: 6.5" Fiber Glass Cone
    • Tweeter: Dual .5" Titanium Coated Dome
    • Frequency Response: 45Hz - 20kHz
    • Power Handling: 120W
    • Sensitivity: 89 dB
    • Impedance: 8 Ohms
    • Dual Voice Coil (DVC) Provides Stereo Sound Within One Speaker
    • Spray Paintable Magnetic Grille Included
    • Inputs: Spring Loaded Binding Posts
    • Install-friendly Dog Ear Installation Brackets
    • Diameter & Depth: 8.86" x 3.54"
    • Cutout Diameter: 7.80"
    • Sold As: Single
    • Warranty: 10 Years
    3 Questions asked
    Have a Questions?

    What's on your mind?

    Johan van Lierop • 12/17/2019, 2:17:43 PM I bought this speaker and have only a single wire running in the ceiling. Can you please tell me how to wire the 2 sets (2-channel?) connectors with one cable? Do i discard one of them or do i bridge them? If the latter, please advice on how to connect + and -. Thank you, Johan van Lierop
    Customer Service • 12/17/2019, 2:17:43 PM
    Well you can jump the cable from one set of inputs to the other, but it won't be running in stereo. It would just be playing one-channel off both inputs.
    bill • 12/17/2019, 2:17:43 PM why do these speakers have 2 places to connect speaker wires t them
    Customer Service • 12/17/2019, 2:17:43 PM
    Hi Bill: These speakers were created specifically for an application where you have a right (+/-) and left (+/-) stereo signal coming into a room where you only have space for a single speaker. So you would connect one pair of conductors to one set of inputs (+/-) and the second pair of conductors to the second set of inputs. Note: If you have a four conductor wire coming tot the speaker then connect the red wire to the positive and black wire to the negative. The n connect the white wire to the second + input and the green wire to the second negative input. This will give you a summed mono single stereo full range signal. You will also notice a switch that is labeled 8/16 ohm. If you connect both voice coils (the two inputs +/-) you will need to make sure the switch is set to 16 ohms. These speaker are Dual Voice Coil, with Dual Tweeters and have dual Application switch (8 or 16 ohm). The switch allows you to connect a pair of these speakers one for the right and the other for left channel, you would just connect one set of inputs for each speaker.The switch would be set at 8 ohm. Whether the switch is at 8 ohms or 16 ohms both tweeters play at the same time. So the advantage is when you use these as a stereo pair you increase the high frequency dispersion with the two tweeters per speaker. See the image that shows how to wire for either 8 or 16 ohms depending on your application. TL/3768
    Michael Panepento • 12/17/2019, 2:17:43 PM I have a large area 20 x 20 & would like to use 4 -640TT speakers to cover it. How would I wire them so that they are all connected to the same stereo amplifier with the correct ohm's? I have already pulled 4- conductor wire to the first speaker location. How do I wire them from there? paralell or in series?
    Customer Service • 12/17/2019, 2:17:43 PM
    Hi Michael: You would want to wire these in Series-Parallel. You will need two conductor cable where you will only be using a single conductor. The result will be an 8-ohm load. Your power handling will go up, distortion will go down, and your sensitivity will be around 92 to 94 dB. I am sending you a drawing in a separate email. Attach to our outgoing mail gives me an error message. So you will see this email twice but the second will have an actual diagram using half the two conductor cable to wire all four speakers together. And it starts with your four conductors. Good luck TL/5481