Primarily designed to be placed into custom cabinetry, the SI-770R utilizes a special crossover network which enhances mid-range and high frequencies. The SI-770R is the perfect in-cabinet companion to Signature Reference freestanding or in-wall models for custom home theaters or other custom installations.

For all Signature Series In-wall Speakers click here.


(Includes one SI-770R speaker and owner's manual.
Does not include installation.)


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.

Model Name:
Signature Reference In-wall
System Type:
Built-in LCR/Center Speaker
Frequency Response:
60Hz-20kHz (±3dB)
90dB (2.83V @ 1 Meter)
Recommended Power:
75-250 Watts
(2) 6-1/2" (165mm) Reference Aluminum Cone Woofers
(1) 4.72" X 1" (120mm x 25mm) AMT
Tweeter Protection:
Swivel Tweeter(s):
Crossover Frequency:
2,700 Hz
Crossover Slope:
6 Ohms
Cabinet Material/Color:
Medium Density Fiberboard (MDF)/Black
Black Fabric
Finished Dimensions:
8-3/4" W x 22" H x 11-1/2" D
(222mm W x 559mm H x 292mm D)
40 lbs. (18.14 kg)
5 Years

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SI In-wall Expand (9/2008)

"I finally have the dream room completed. With the assistance of the great folks at RBH, I have the system optimized now. The image the SI-770 presents is spectacular. When pushed to high volume levels, the sound stage envelopes the entire room. The top end end is so sweet and detailed. It never seems painful. It’s so weird. At concert volumes, You hear more detail that has been absent with my other speaker brands. They never develop an offensive sound. Hit the gas and it makes you giggle like a little girl with a new puppy.

The subs are the best I have ever heard. They are not just ear candy, but a full body experience. The waves roll right through your chest, chair, wall, my cats. My initial configuration had far too much power applied. When watching U571, the depth charges had everyone ducking for cover. They scared my spouse half to death. I started laughing. The subs handled this without any strain. It’s clear that my home only needed one sub but I can’t help loving the excess. You have to head to my car garage to sense the full wave these produce. I can see dust falling from the ceiling. How much fun is this, right?

This is the finest system I have ever owned or heard. All of my other speakers have been sold off now. I no longer feel the need to hunt for the next new speaker. I am content...but the guys at RBH always speak to you about the new projects that’s in the works. They are proud of their hardware, and it shows." --C. Winberg