RBH Sound SI-663/R - Dreamedia AV
Vendor: RBH Sound

RBH Sound SI-663/R

In-wall high-fidelity speaker for surround sound

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RBH Sound SI-663/R

Unveiling the Pinnacle of In-Wall Sound: RBH Sound SI-663/R

Imagine a home theater that doesn't just play movies; it transports you into the heart of the action, where every sound is felt just as intensely as it is heard. The RBH Sound SI-663/R is designed to bring this level of immersive audio into your home without compromising on space or aesthetics. Crafted for the discerning audiophile, this in-wall reference speaker from the Signature Reference Series is a testament to RBH Sound's commitment to audio excellence and innovative design.

High-End Craftsmanship Meets Advanced Technology

The RBH Sound SI-663/R is not just a speaker; it's a piece of precision-engineered audio art. With its trio of 6-1/2" aluminum cone woofers and dual AMT tweeters, it delivers a frequency response that spans from the deep rumble of 50Hz to the soaring highs of 40kHz. The woofers, with their cast aluminum baskets and solid aluminum phase plugs, are as visually striking as they are sonically effective, available in both silver and black-anodized finishes to match any interior.

Key Features: - System Type: Sealed / LCR Dual Channel Speaker - Drive Units: 3 x 6-1/2" woofers, 2 x AMT tweeters - Frequency Response: 50Hz-40kHz (±3dB) - Sensitivity: 91dB Main, 89dB Center, 93dB Combined - Power Handling: Up to 450 Watts Combined - Impedance: 8 Ohms Main, 6 Ohms Center, 4 Ohms Combined - Tweeter Protection: Yes, for longevity and reliability - Crossover Frequency: 2,700 Hz with a 12dB/Octave slope

Seamless Integration into Any Room

The RBH Sound SI-663/R's in-wall design is a game-changer for those who value both high-fidelity sound and interior design. With its slim profile and customizable grille options in black or white fabric, this speaker blends effortlessly into the walls of your home, ensuring that your décor takes center stage. The high-density fiberboard construction not only ensures durability but also enhances sound quality by reducing cabinet resonance.

In-Wall Cabinet Details: - Material: High Density Fiberboard (HDF) - Finish: Black Paint - Dimensions: 14” W x 56” H x 3-1/2” D

Flexible Configuration for Unrivaled Audio Performance

Whether you're setting up a dedicated cinema room or integrating a sound system into your living space, the SI-663/R offers unparalleled flexibility. As a standalone center channel or part of a more extensive surround sound setup, it delivers a seamless and coherent audio experience. When three SI-663/R speakers are used in a single-channel configuration, they create a front sound stage that rivals even the most prestigious commercial theaters.

Configuration Options: - Center Channel: Dedicated and discrete when wired for dual channel operation - Front Sound Stage: Reference-level with three units in single-channel configuration - Compatibility: Timbre-matched to other RBH Sound Signature Series models

The Ultimate Solution for Custom Installations

Dreamedia's expertise in home theater design means we understand the challenges of creating the perfect audio environment. The SI-663/R is our go-to recommendation for custom installations where a traditional center channel is not feasible. Its ability to provide discrete center channel audio from left and right front speakers is a testament to its innovative design and the meticulous attention to detail that RBH Sound is known for.

Installation Highlights: - Vertical Installation: Requires the terminal cup on top, positioned between studs - Wiring Options: Dual mode or single mode setup for versatility - Pre-Wiring: Speaker wires run from the terminal cup to an amplifier/receiver

High-Performance Audio for the Home Theater Enthusiast

The SI-663/R is more than just a speaker—it's an investment in high-quality audio performance. Its dynamic sound profile is engineered to capture the nuances of your favorite movies and music, providing an immersive listening experience that is second to none. With the SI-663/R, you'll hear every detail, from the subtlest whisper to the most intense action sequences, with crystal-clear clarity.

Audio Performance Features: - Dynamic Sound: Captures the full spectrum of audio for an immersive experience - High Fidelity: Engineered for accurate sound reproduction - Bass Extension: Influenced by subwoofer placement for tailored low-frequency response

Designing Your Dream Home Theater with Dreamedia

At Dreamedia, we take pride in helping our clients achieve their perfect home theater setup. The RBH Sound SI-663/R is a crucial component of that vision, offering a high-fidelity solution that meets the most demanding custom installation requirements. Our team is ready to design a system that incorporates these exceptional speakers, ensuring that your home theater is both visually stunning and sonically superior.

Commitment to Quality and Service

Choosing the RBH Sound SI-663/R means investing in a product backed by a decade of warranty assurance. As an authorized RBH Sound online dealer, Dreamedia guarantees genuine products and comprehensive support. We are dedicated to providing our clients with not just a speaker, but a lasting audio experience that resonates for years to come.

Warranty and Support: - Warranty: 10-year limited - Authorized Dealer: Assurance of genuine RBH Sound products and support

Embrace the Future of Home Theater Sound

The RBH Sound SI-663/R represents the pinnacle of in-wall sound technology. Its combination of high-end craftsmanship, advanced technology, and flexible installation options makes it the perfect choice for anyone looking to elevate their home theater experience. With Dreamedia's expertise in custom home theater design, you can rest assured that your investment in the SI-663/R will be fully realized in the form of an awe-inspiring audio environment.

Transform your home into the ultimate entertainment destination. Choose the RBH Sound SI-663/R for a sound that's seen and not heard, but felt in every corner of your soul. Contact Dreamedia today to begin the journey toward audio perfection.

The reference version of the SI-663, the SI-663/R is designed for demanding custom installations where a center channel cannot be used or is intentionally removed for design considerations. When wired for dual channel operation, a pair of the SI-663R reference in-wall speakers can provide a discrete and dedicated center channel from the left and right speakers. When three SI-663/Rs can be used, the trio wired in singlechannel configuration, can provide a seamless, reference level front sound stage from their covert in-wall locations.

Our Review


The RBH Sound SI-663/R is an in-wall speaker designed specifically for use in surround sound systems. It offers high-quality audio performance and can be used as a standalone center channel or in conjunction with other SI-663 units. Its in-wall design allows for a discreet and space-saving installation, making it an ideal choice for those looking to maintain a clean and clutter-free home theater setup.

Design and Installation

The RBH Sound SI-663/R's in-wall design is a standout feature, offering a space-saving solution that helps avoid clutter in your home theater. By installing the speaker directly into the wall, you can seamlessly integrate it into your room design without sacrificing valuable floor space. However, it's important to note that in-wall installation may require professional assistance, especially for those without prior experience in wiring and mounting speakers.

Weighing in at 55 lbs, the SI-663/R is not the lightest speaker on the market. This weight, coupled with the complexity of in-wall installation, means that extra care and attention should be taken during the setup process. It's advisable to seek professional assistance to ensure a proper and secure installation.

Audio Performance

One of the key factors to consider when choosing an in-wall speaker is audio performance, and the RBH Sound SI-663/R does not disappoint in this regard. It offers high-quality sound reproduction, delivering immersive and dynamic audio that enhances your home theater experience. Users have praised the SI-663/R for its ability to reproduce sound with clarity and precision, creating a lifelike and engaging listening experience.

The SI-663/R is part of the RBH Sound Gold LCR series, which has garnered a positive reputation among users over the years. This series is known for its exceptional audio performance and the SI-663/R maintains that standard. The speaker's timbre-matched design ensures consistent sound quality when combined with other RBH Sound Signature Series in-wall and freestanding models, allowing for a cohesive and balanced audio experience.

The SI-663/R features three 6.5-inch metal cone woofers and two 1-inch silk dome tweeters, providing a well-rounded frequency response and accurate sound reproduction. It is specifically designed to serve as front left or right speakers in a home theater system, delivering clear and detailed audio for your favorite movies, TV shows, and music.

Unique Features and Benefits

One of the standout features of the RBH Sound SI-663/R is its ability to eliminate the need for a dedicated center channel. When used in pairs, the SI-663/R can provide discreet center channel audio from the left and right front speakers. This is particularly useful in installations where a center channel cannot be used or is intentionally removed, allowing for greater flexibility in speaker placement and room design.

By wiring the SI-663/R in the standard configuration with three units, you can create a seamless front sound stage. This configuration enables discrete left, center, or right channels, ensuring a cohesive and immersive audio experience. Whether you're watching an action-packed movie or listening to your favorite music, the SI-663/R offers a seamless integration of sound that enhances the overall enjoyment of your entertainment.

In addition to its performance benefits, the SI-663/R also offers customization options for room design and speaker placement. Its in-wall installation allows for a clean and integrated look, blending seamlessly with your room decor. The speaker can also be wired for dual-channel operation or standard configuration, providing flexibility in setup to suit your specific needs and preferences.

The SI-663/R also offers the option of black-anodized woofers, which can help reduce light reflections in certain room environments. This feature is especially beneficial for those who have windows or other light sources near their home theater setup, ensuring that the focus remains on the immersive audio experience without any distracting reflections.

Limitations and Considerations

One limitation to consider when evaluating the RBH Sound SI-663/R is its limited availability for demo. As the buyer has not had the opportunity to experience the product firsthand, it may require additional effort to assess its performance and suitability for specific needs. While the positive reputation of the RBH Sound Gold LCR series provides some assurance, it's always preferable to have a personal experience with the product before making a final decision.

It's important to note that the SI-663/R is optimized for installations where a center channel is intentionally removed or cannot be used. While this configuration offers flexibility and customization options, it may not be the ideal choice for those who require a traditional center channel speaker in their surround sound setup. The SI-663/R's specific use case may limit its suitability for all types of installations and design requirements.

Another consideration is the SI-663/R's in-wall installation requirement. While this design allows for a discreet and space-saving solution, it may not be preferable for those who prefer freestanding or bookshelf speakers. In-wall installation can be more complex and may require professional assistance, especially for those without prior experience in wiring and mounting speakers. It's important to factor in the additional effort and expertise required when considering the SI-663/R for your home theater setup.


The RBH Sound SI-663/R offers a high-fidelity solution for custom installations where a dedicated center channel cannot be used or is intentionally removed. Its in-wall design provides a space-saving and discreet solution that can be seamlessly integrated into different room designs. With its high-quality audio performance, customizable wiring options, and timbre-matching capabilities, the SI-663/R delivers a dynamic and immersive listening experience.

However, it's important to consider the limitations and specific use case of the SI-663/R. It may not be suitable for all surround sound setups or design requirements, and its in-wall installation requirement may pose challenges for those who prefer freestanding or bookshelf speakers. Additionally, the limited availability for demo may require additional effort to assess its performance before making a final decision.

Overall, the RBH Sound SI-663/R is a well-regarded in-wall speaker that offers flexibility, high performance, and a seamless integration into your home theater setup. If you have a custom installation where a dedicated center channel is not feasible or intentionally removed, the SI-663/R may be the perfect choice to enhance your audio experience.


General Specifications

  • Speaker Type: In-wall
  • Series: Signature Reference Series
  • Speaker Configuration: 3-way
  • Frequency Response: 45Hz - 20kHz (±3dB)
  • Impedance: 4 ohms
  • Power Handling: 200 watts
  • Sensitivity: 89dB
  • Recommended Amplifier Power: 50-200 watts
  • Crossover Frequency: 2,500Hz
  • Enclosure Type: Sealed
  • Enclosure Material: MDF (Medium-Density Fiberboard)
  • Mounting Depth: 3.5 inches (8.89 cm)
  • Cutout Dimensions (H x W): 27.5 x 8.75 inches (69.85 x 22.23 cm)
  • Overall Dimensions (H x W): 29.5 x 10.75 inches (74.93 x 27.31 cm)
  • Weight: 40 lbs (18.1 kg)

Driver Components

  • Woofer: 6 ½ inches, aluminum cone
  • Tweeter: 1 inch, silk dome
  • Number of Woofers: 3
  • Number of Tweeters: 3


  • Tweeter Protection: Yes
  • Crossover Slope: 12dB/Octave
  • Can Serve as Center Channel: Yes
  • Can be Wired for Dual-Channel Operation: Yes
  • Suitable for Amplifiers: 50 to 200 watts
  • Grille Options: Black or White Fabric


  • Internal Bracing: Yes
  • Damping: Well-damped
  • Installation Pre-Drywall: Yes
  • Mud-Ring for Drywall Installation: Yes


  • Exceptional Music Reproduction: Yes
  • High Dynamics and Soundstage: Yes
  • Natural and Immersive Sound: Yes

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