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Klipsch CDT-3650-C-II

In-ceiling speaker

Item #: 714C3650C2

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3 Reviews | 1 question - 1 answer

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Treat yourself to top-notch sound with a speaker that blends seamlessly into your home's décor. The Klipsch® CDT-3650 II installs in your ceiling, so it won't take up one inch of floor space. And its high-tech design and solid construction make it a great choice for movie and music lovers alike. You can use multiple CDT-3650 IIs for surround sound in an all-Klipsch home theater, or install them in pairs for stereo listening with your multi-room audio system. Either way, you'll enjoy crisp, clear Klipsch sound without the clutter of conventional speakers.

Ready, aim, music!

The '3650-C-II's 1" aluminum tweeter gives you 100-degree dispersion, and it swivels, so you can aim the sound precisely where you need it to go. You can even rotate the 6-1/2" woofer a full 360 degrees and tilt it up to 15 degrees in any direction. This flexibility gives you full, detailed sound no matter where you place the speaker. Plus, a tweeter attenuation switch lets you adjust the sound to suit your personal taste and your room's acoustics.

Horn technology for room-filling sound

Because high-frequency sounds are more directional than bass frequencies, it's especially important to target them right toward your ears. Klipsch places their tweeter inside a flared opening, known as a "horn." This design brings out details in everything you listen to, while reducing reflections that can color the sound.

Slimmer chance of being seen

The CDT-3650 II keeps a low profile with its SlimTrim™ grille. The visible frame size is reduced by 90% and grille depth is reduced by 80% over previous designs, for a nearly flush finish that blends in beautifully. The paintable aluminum, magnetic grille attaches securely with ease to virtually eliminate resonant distortion.

An optional in-ceiling bracket is recommended for installing the CDT-3650-C-II in new construction.

Got wire?

Most speakers don't include any. Learn more about in-wall wiring.
Shop our selection of in-wall speaker wire.

Product Highlights:

  • 1" tweeter with with swiveling Tractrix® horn
  • pivoting 6-1/2" IMG woofer
  • power handling: up to 50 watts RMS (200 watts peak)
  • frequency response 63-23,000 Hz (±3dB)
  • sensitivity 93 dB
  • 8-ohm impedance
  • paintable SlimTrim™ magnetic grille
  • treble attenuation switch
  • cutout dimensions: 8-3/16" diameter
  • mounting depth: 4-1/2"
  • warranty: lifetime
  • Our 60-day money-back guarantee
Priced each

    Klipsch CDT-3650-C-II Reviews

    Average Customer Review:

    3 Reviews

    Love them

    Written by: Wes S from North Carolina on December 3, 2014

    Crutchfield Customer Review (What's this?)

    I had a home theater expert pre-wire the room and then (after construction was complete) install the speakers. It is a beautiful installation. Installer said that he loved these Klipsch in-wall speakers because the installation was so easy because the grill is magnetic and installs effortlessly. After seeing what is involved, I really think I could have installed them myself.

    But I love them because the look perfect. Very little of the speaker grill projects from the ceiling and the grill is very pretty. Sound is great, too. You'll love these.

    Pros: Ease of installation, great looks, great sound.

    Cons: None

    Excellent Speakers

    Written by: PD from Texas on July 5, 2014

    Crutchfield Customer Review (What's this?)

    I was hesitant because of the price. They are well worth the money. You can't go wrong with these. If you don't like these, you can't be pleased!

    Pros: Look great. Magnetic covers. Easy to install anywhere.



    Written by: Nick from Beaumont, CA on January 13, 2014

    Crutchfield Customer Review (What's this?)

    I recently purchased these as the solution to wanting good rear surround speakers without having anywhere to place floor standing speakers. They are driven by a SONY STR- DN840 and they sound fantastic. Installation was a snap and it was literally just cutting a hole and turning a screwdriver a few turns and done! I love how the driver and tweeter can be individually adjusted so that you can aim at the listening "sweet spot". Since these are surrounds I can't comment on their "standalone" performance, but they are clear, crisp, and handle loud without complaining. They look like they belong, blending into the ceiling without issue.

    Pros: Easy installation, directional driver / tweeter, crisp clear sound at all volume levels.

    Cons: Expensive

    Hands-on research

    What's in the box?

    Download owner's manual

    • Ceiling-mount speaker
    • White metal mesh grille
    • Cardboard template
    • Owner's Manual (En/Fr/Sp)

    Features and Specs

    Enclosure Type In-ceiling
    Video Shielded No
    Tweeter Horn-loaded dome
    Midrange Size N/A
    Woofer Size 6.5
    Woofer Composition Cerametallic
    Woofer Surround Rubber
    Power Range (Watts) 50
    Sensitivity 93 dB
    Impedance (Ohms) 8
    Frequency Response 63-23kHz
    Connector Type Spring clips
    Bi-Amp Inputs No
    Parts Warranty Ltd. Lifetime
    Labor Warranty Ltd. Lifetime

    Product Research

    Mounting Options


    Controlled Dispersion Technology (CDT): The Klipsch CDT-3650-C II in-ceiling speaker features a patent-pending gimbal mechanism, known as Controlled Dispersion Technology (CDT). The tweeter and woofer are independently adjustable, allowing both the high and low frequencies to be directed toward the listening area.

    High Efficiency: The high-efficiency design of the Klipsch in-ceiling speakers allows you to get much more output than most in-wall and in-ceiling speakers. Due to the long speaker wire runs that are common in whole-house audio systems, the power coming from the amplifier is significantly reduced by the time it reaches the speakers. The 93dB efficiency of this speaker means it will play much louder at low power than other less-efficient speakers.

    2-Way Driver Design: The Klipsch CDT-3650-C II uses a high-quality 1" aluminum dome compression driver (tweeter) mated to an exclusive Tractrix Horn, combined with a 6.5" copper-colored IMG (injection-molded graphite) woofer in a 2-way design.

    • Tweeter: There is a 1" aluminum dome tweeter mated to a swiveling 100° Tractrix Horn. The swiveling horn design dramatically increases efficiency by enabling the speaker to produce more output using less energy. The horn-loaded tweeter allows you to point the sound to a specific location, and has more controlled directivity than a conventional dome tweeter.
    • Woofer: The 6.5" copper-colored IMG (injection-molded graphite) woofer can rotate a full 360°, and then shift 15° in any direction. The solid Injection Molded Graphite woofer cone has been strengthened for even more accurate bass reproduction.

    Speaker Terminals: The speaker has a pair of spring clips that can accept up to 12-gauge wire or pin connectors.

    ABS Basket/Frame: The CDT-3650-C II has a sturdy ABS basket and frame. The frame can be painted to match any decor.

    SlimTrim Magnetic Grille: With an all new grille, the visible frame size is reduced by 90% and grille depth is reduced by 80% over the previous design, for a more edge-to-edge consistent look that blends in with the wall more attractively. The new aluminum, paintable, magnetic grille attaches tightly and securely with ease to virtually eliminate resonant distortion.

    Power Specifications Note: The manufacturer has specified the maximum power handling of this speaker as 50 watts RMS (200 W Peak). Klipsch has also published a recommended amplifier power specification as 100 watts.

    Mounting Options

    Installation: The speaker can be installed in new or existing construction. It requires a cutout diameter of 8.1875". For new construction, purchase of the IK-650-C installation kit (714IK650C, sold separately) is highly recommended. For existing construction, the speaker should be installed in drywall at least 3/8" thick. It can also be installed in a drop ceiling (2' x 2' or 2' x 4' ceiling tiles only). In both cases, to maximize the acoustic performance of the in-ceiling speakers, Klipsch recommends you replace the original mounting panel with 1/2" or 3/4" plywood or MDF. A cardboard template is included to assist you in making the cutout.

    Our Product Research Team

    At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

    Customer Q&A

    Crutchfield asked  
    Why did you buy this?

    Great sound quality. Klipsch speakers always deliver! [ Brian  Dec 09, 2015 ]

    1 question already asked

    For most speakers connecting them backwards like this would cause some issues, but the speaker may still work. If you purchased the product from Crutchfield, feel free to contact our Tech Support team. They can troubleshoot with you. Our toll-free Tech Support number is printed on your invoice, and is also available under the "My Orders" tab in the "My Account" section of our website. [ Jeff  Dec 28, 2015 ]  Staff

    Looking for more? Check out the next model in this lineup.

    Klipsch CDT-3800-C II

    Larger woofer for deeper bass

    The Klipsch CDT-3800-C II offers these features:

    8" woofer and 1" titanium dome tweeter with swiveling horn

    frequency response 56-23,000 Hz