RBH Sound SI-831/R9 2-way built-in speaker (9" deep cabinet)

High-Fidelity In-Wall Speaker with AMT Tweeter


Type: Speaker
Driver Color
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Unveiling the Pinnacle of Sound: RBH Sound SI-831/R9

Immerse yourself in the ultimate auditory experience with the RBH Sound SI-831/R9, a marvel of acoustic engineering designed for the discerning audiophile. With its impressive array of features, this 2-way built-in speaker is a masterpiece that transforms any medium to large home theater or listening room into a concert hall. Let's explore the symphony of elements that make the SI-831/R9 a standout choice for your audio sanctuary.

High-Quality Sound Redefined

The RBH Sound SI-831/R9 is not just a speaker; it's an invitation to rediscover your favorite music and movies with unparalleled clarity and depth. Here's why it will captivate your senses:

  • Wide Frequency Response: Spanning from 50Hz to 35kHz, every note is rendered with precision, from the deep rumble of bass to the soaring heights of treble.
  • High Sensitivity: At 93dB, the speaker effortlessly fills your space with sound, ensuring even the subtlest of audio details is heard.
  • Powerful Performance: With a recommended power range of 100-500 Watts, the SI-831/R9 can handle the dynamics of any soundtrack with ease.
  • Deep, Rich Bass: Three 8" Reference Aluminum woofers deliver bass that's both deep and articulate, creating a solid foundation for all types of audio content.
  • Crisp Highs: The 1" AMT (Air Motion Transformer) tweeter ensures high frequencies are reproduced with exquisite detail and clarity.

Exquisite Design and Durability

The RBH Sound SI-831/R9 boasts a design that's as robust as it is refined. Its high-density fiberboard (HDF) construction promises longevity, while the sleek black or white satin finish complements any décor. Additionally, the speaker's discreet design allows for placement behind acoustically transparent screens, preserving the aesthetic of your home theater.

Effortless Integration and Customization

Integration into your existing setup is seamless, with compatibility across the RBH Sound series. For those seeking deeper bass, optional back cans are available to enhance low-frequency performance. Furthermore, installation is a breeze with a friction-fit design that doesn't require permanent adhesives.

Tailored to Your Listening Experience

The RBH Sound SI-831/R9 adapts to various audio scenarios, whether you're enjoying stereo separation in a 2-channel environment or immersing yourself in a 9.2.7 DTS:X Pro system. It's also an ideal match for a 5.2.4 home theater setup, providing comprehensive sound coverage.

Peace of Mind with Exceptional Service

Dreamedia stands by the quality of the RBH Sound SI-831/R9 with a 5-year warranty, free nationwide shipping, and a 30-day hassle-free return policy. Our price assurance and access to expert audio/visual setup assistance ensure that your investment is protected and maximized.

In-Depth Look at Notable Features

  • Award-Winning Performance: Revel in the sound quality that has garnered accolades, setting a new benchmark for in-wall speakers.
  • Custom Integration: Designed to blend seamlessly into your living space without compromising on sound quality.
  • Matte Black Finish: A sophisticated look that's as pleasing to the eye as the speaker is to the ear.
  • Ribbon Tweeter Excellence: Experience the pinnacle of high-frequency reproduction with a ribbon tweeter known for its exceptional sound quality.
  • Enhanced Bass with SV-1212 Subwoofer: Pair with the SV-1212 subwoofer for a bass experience that's both powerful and precise.
  • Active Bi-Amping Capability: For those seeking the ultimate control over their audio, actively bi-amping the SI-831/R9 is an option that delivers.
  • Swivel Tweeter(s): Customize the sound dispersion to suit your room's unique acoustics.

The RBH Sound SI-831/R9 Experience

Step into a world where every strum of a guitar, every whisper of dialogue, and every crescendo of an orchestra is conveyed with an authenticity that's nothing short of transformative. The RBH Sound SI-831/R9 is a testament to what's possible when craftsmanship meets innovation.

Whether you're a movie buff seeking to be enveloped by the action or a music enthusiast looking to be moved by every nuance, the SI-831/R9 is your ticket to a superior acoustic journey. It's not just about hearing the difference—it's about feeling it in your very core.

Unmatched Customer Service

Dreamedia is more than just a provider of high-end audio equipment; we're your partners in crafting the perfect home theater system. Our team of experts is on hand to assist with everything from audio/visual setup to finding the ideal installer in your area. With Dreamedia, you're never alone in your quest for the perfect sound.


The RBH Sound SI-831/R9 represents the zenith of audio perfection, offering an unrivaled listening experience that's both immersive and emotive. It's a celebration of sound, designed for those who demand nothing but the best. Invest in the SI-831/R9 and prepare to be enthralled by every note, beat, and scene like never before.


We're proud to be an authorized online dealer of RBH Sound

Combining the award-winning performance of its SV-831R sibling with the visual benefits of custom integration, the SI-831R is specifically designed to be discreetly placed behind acoustically transparent screens. The SV-831R employs three 8-inch aluminum cone woofers and an AMT aero-striction tweeter, and is capable of handling copious amounts of power. The SI-831R can deliver paramount fidelity and performance for even the largest home theater or listening room.


  • General Specifications
  • Model: RBH Sound SI-831/R9
  • Type: 2-way built-in speaker
  • Cabinet Depth: 9 inches
  • Frequency Response: 50Hz-35kHz (±3dB)
  • Sensitivity: 93dB (2.83V @ 1 Meter)
  • Recommended Power: 100-500 Watts
  • Impedance: 4 Ohms
  • Dimensions: 13-1/2" W x 42" H x 9" D (335mm W x 1066mm H x 229mm D)
  • Weight: 62 lbs. (28.12 kg)
  • Warranty: 5 years
  • Speaker Components
  • Woofer: (3) 8" (203mm) Reference Aluminum
  • Tweeter: (1) 4.72" X 1" (120mm x 25mm) AMT
  • Crossover Specifications
  • Crossover Frequency: 2,200 Hz
  • Crossover Slope: 24dB/Octave
  • Design and Construction
  • Grille: Sold separately
  • Finish: Black/White Satin Paint
  • Cabinet Material: High Density Fiberboard (HDF)
  • Additional Features
  • Grille Options: 831-SW/R Grille Black, 831-SW/R Grille White
  • Discreet Design: Yes
  • Award-winning Performance: Yes
  • Custom Integration: Yes

Additional Info

Speaker Combinations

Each RBH Sound speaker series can be mixed and combined within the like series, creating a vast selection of options to create a unique home theater experience.