One of the benefits of in-ceiling speakers is how easily they disappear into a room. Unfortunately, the sound coming from the back of the speaker doesn’t disappear and can distract those in the rooms above the speakers. MartinLogan offers back boxes, or enclosures, for Motion CI and Motion XT CI In-ceiling speakers. For these situations where sound control is desired, these retrofittable back boxes are the perfect solution. They offer 20dB of noise reduction into adjacent areas and offer the perfect solution to achieve consistent performance where ceiling cavity sizes may vary throughout an installation. Please note that the volume of air in the retrofit enclosure is smaller than that of your ceiling, and bass extension will be reduced. If sound control is not necessary for your unique installation, we recommend not using the back box so the speaker can take advantage of the larger airspace in your ceiling cavity.
Q: Which MartinLogan speaker models are compatible with the C8BXR back box?
A: The C8BXR back box is compatible with the MartinLogan MC8 and XTC8 speaker models.
Q: What is the diameter of the cutout required for installing the C8BXR back box?
A: The C8BXR back box requires a cutout diameter of 9.25 inches for installation.
Q: What is the purpose of the MartinLogan back boxes?
A: MartinLogan back boxes, or enclosures, reduce the sound that travels from the back of in-ceiling speakers to adjacent rooms.
Q: Are there any drawbacks to using the back boxes with my speakers?
A: Yes, using the back box will reduce bass extension because the volume of air in the enclosure is smaller than that of your ceiling.
Q: How much noise reduction do the back boxes provide?
A: These back boxes offer 20dB of noise reduction into adjacent areas.
Q: Does MartinLogan recommend always using the back box?
A: If sound control is not an issue, MartinLogan recommends not using the back box so the speaker can utilize the larger airspace in your ceiling cavity.
Q: Do these fit the IC8 series?
A: Unfortunately, they do not, they only fit the MC8 and XTC8 speaker.
Q: Are these to cap your subwoofer speakers?
A: Hello. These backboxes are designed to work with our in-wall MC8 and XTC8 speakers. The speakers have an exposed back, so adding the backbox can help redistribute the sound waves to listeners below and help remove sound that can transfer to the floor above.

One of the benefits of in-ceiling speakers is how easily they disappear into a room. Unfortunately, the sound coming from the back of the speaker doesn’t disappear and can distract those in the rooms above the speakers. MartinLogan offers back boxes, or enclosures, for Motion CI and Motion XT CI In-ceiling speakers. For these situations where sound control is desired, these retrofittable back boxes are the perfect solution. They offer 20dB of noise reduction into adjacent areas and offer the perfect solution to achieve consistent performance where ceiling cavity sizes may vary throughout an installation. Please note that the volume of air in the retrofit enclosure is smaller than that of your ceiling, and bass extension will be reduced. If sound control is not necessary for your unique installation, we recommend not using the back box so the speaker can take advantage of the larger airspace in your ceiling cavity.

The XTC8 features our largest and highest performing FMT XT and a woven Kevlar woofer. These features make a noticeable improvement to the sound but also help to reduce unwanted room acoustic artifacts. With a more controlled 80° x 30° dispersion, the FMT XT is a powerful tool that delivers unheard levels of realism from a CI speaker in even the most acoustically challenging rooms. The XTC8 is a great choice for a high performance whole house music system, or for premium home theater. Its unique combination of high-performance drivers and controlled dispersion allows you to control where sound is placed in a room and provides an even better experience. The MartinLogan Motion XT CI series takes performance to the next level over Motion CI. The Folded Motion XT tweeter gives each model in the Motion XT series even more of the clarity, output, and efficiency that the standard size FMT is famous for. With Motion XT, we wanted to increase all aspects of performance over the Motion series, so we didn’t just stop at the tweeter. All Motion XT models feature woven Kevlar woofers for increased rigidity and lightness which translates into better sound. In addition to the larger tweeter, and lighter, stronger woofers, MartinLogan’s design and engineering team has fitted the Motion XT series with a more substantial chassis to strengthen the speaker and provide a more accurate sound, like a better cabinet on a traditional speaker. With Motion XT CI, the difference is in the details. No matter which Motion XT CI speaker you choose for your room, rest assured they are designed to provide a consistently high level of performance and can easily be used with other MartinLogan speakers to make creating the perfect system for your unique listening space that much easier.

By far the most popular size for in-ceiling speakers, the MC6 features a 6.5” woofer with higher power handling, greater output capability, and improved bass response over the smaller MC4. This model works without a built-in enclosure to allow the speaker to use more airspace for higher performance. For applications where sound control is desired, an optional retrofittable back enclosure is available separately. As with all Motion series CI speakers, the MC6 uses MartinLogan’s signature Folded Motion Tweeter for precise clarity and incredible realism to meet all your entertainment needs. All MartinLogan Motion CI Series speakers feature our signature Folded Motion Tweeter or FMT. This innovative piece of audio technology provides incredible detail, precise clarity, clean output and high efficiency in a small but mighty package. Pairing this tweeter with lightweight woven fiberglass woofers means that Motion CI delivers a clean and balanced sound that is perfectly suited for any application. Whether you listen to music, movies or a little bit of everything, Motion CI gives you a true high-end audio experience at an affordable price. To round out the assortment, pre-construction brackets are available for all models, and all in-ceiling models have square grilles and retrofittable back enclosures available separately.

The CCM663 offers the kind of in-ceiling performance ordinarily reserved for high quality bookshelf speakers. Featuring a 6" woven Aramid Fiber Midbass Driver and Aluminum Dome Tweeter, you’ll experience clear, balanced sound with great driving bass. The tweeter features Nautilus Swirl technology for clearer performance and it can be angled towards your listening area to fine tune your sound. The whole speaker chassis is fabricated from cast aluminum for maximum rigidity and offers superior performance to the plastic baskets found in mass-market designs. The Quick Dog mounting system makes installation a breeze and easy on your arms. The grill and speaker can be painted to match the surrounding surface and a paint guard is included. Looking for better performance? The CCM662 offers an even larger motor system for greater power handling and output. Bowers & Wilkins CI600 Series of in-ceiling and in-wall speakers improves on our CI300 range by combining next-level performance with innovative features that make them a breeze to install and fine-tune for personalized sound. Looking for a step-up in performance? The CI700 Series offers improved parts quality and manufacturing techniques for improved performance.
| Pros for MartinLogan - Motion XT Series CI, Retro-Fit Backbox Enclosure for MC8 and XTC8 - Black/Silver | |||
|---|---|---|---|
| There were no pros for this product— | There were no pros for this product— | Sound Quality | Sound Quality, Installation, Tweeter, Bass |
This product doesn't have any reviews yet.