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Monitor Audio SB-4

Passive 3-channel home theater sound bar

Item # 893SB4B

This ultra-wide three-channel speaker delivers big sound for your big TV.

This ultra-wide three-channel speaker delivers big sound for your big TV.

California customers:
Please click here for your Proposition 65 warning.

Item # 893SB4B

In stock

Other options

Since 1974

Years of experience making people happy.

60-day price protection

We’ll reimburse you if the price drops.

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About the Monitor Audio SB-4

Monitor Audio quality for your front soundstage

The SB-4 may look like an oversized version of a regular sound bar, but this passive speaker is engineered with Monitor Audio's premium cabinet and driver technologies for truly high-performance home theater. The high-density MDF cabinet is internally braced, creating a rigid, low-resonance enclosure. 

Monitor Audio quality for your front soundstage

The SB-4 may look like an oversized version of a regular sound bar, but this passive speaker is engineered with Monitor Audio's premium cabinet and driver technologies for truly high-performance home theater. The high-density MDF cabinet is internally braced, creating a rigid, low-resonance enclosure. 

Inside you'll find 4" woofer cones and 1" dome tweeters that are made of C-CAM — a high-tech ceramic-coated aluminum/magnesium alloy. This exceptionally stiff, lightweight material allows the drivers to respond swiftly and precisely to the audio signal for greater accuracy. The tweeters also get an anodized coating of gold that helps ensure smooth, extended highs.

The bar has three separate driver arrays. The left and right channels each include a single tweeter, dual mid/bass drivers, and an ABR (Auxiliary Bass Radiator). The center channel has the same, but with an extra ABR. The racetrack-style ABRs supplement the mid/bass drivers to provide additional bass punch and power handling.

Monitor Audio SB-4

Monitor Audio's SB-4 has integrated silicon feet for secure cabinet-top placement.

Designed with larger screens in mind

The SB-4 is huge — over 5 feet wide, in fact, so it's a great match for screens that are 70 inches and larger. As the TV or movie action pans from side to side, the sound will follow it smoothly.

And with a wraparound grille cloth and brushed aluminum endcaps, the bar will look great whether it's placed on your entertainment center or mounted on your wall (bracket sold separately). 

Make sure you have what you need

Most sound bars that we offer are completely self-contained, self-powered speaker systems. But the SB-4 needs a separate home theater receiver for power and TV connections. In addition to a receiver, you might consider getting a powered subwoofer to fill out the low end, especially in larger rooms.

You'll also need speaker wire. Check out our shopping guide to learn more.


Product highlights:

  • includes separate left, center, and right channels in a single sound bar speaker design
  • non-powered — connects to your home theater receiver's front three channels
  • handles up to 80 watts per channel
  • designed for TV screen sizes 70" and larger
  • frequency response 70-30,000 Hz (±3dB)
  • sensitivity: 87 dB
  • impedance: 8 ohms
  • three 1" C-CAM gold dome tweeters for detailed sound and extended high-frequency response (one per channel)
  • six 4" C-CAM mid/bass drivers for clear midrange and punchy bass (two per channel)
  • four Auxiliary Bass Radiators
    • one each in left and right channels
    • two in center channel
  • integrated silicon feet for cabinet-top placement
  • designed to fit SANUS TV mounting systems
  • optional wall-mount bracket sold separately
  • 3 sets of gold-plated binding post speaker terminals (one set per channel)
  • 61-1/2"W x 5-13/16"H x 3-5/8"D
  • weight: 26.44 lbs.
  • warranty: lifetime
  • Our 60-day money-back guarantee
  • MFR # SB4B

Separate A/V receiver required. Shop compatible receivers

What's in the box:

  • Passive soundbar loudspeaker
  • 4 Screws
  • Owners Manual
  • Warranty Information
  • Important Safety Instructions

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Monitor Audio SB-4 reviews

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More details on the Monitor Audio SB-4

Stacey B.

Features & specs

Design Bar
Amplification Separate Receiver Required
Separate Subwoofer No
Wireless Surrounds No
Number Of Channels 3
Surround Formats
Dolby Digital No
Dolby Atmos
Audio Enhancements
Dialogue Enhancement No
Auto Volume No
Night Mode No
Virtual Surround No
Auto Calibration No
Audio Connections
Optical Digital Inputs None
Coaxial Digital Inputs None
HDMI eARC Input No
3.5mm Stereo Analog Inputs None
RCA Stereo Analog Inputs None
USB Type-A Input No
Subwoofer Output 0
Audio Specs
Tweeter 1" Dome (3)
Midrange None
Woofer 4" Cone (6)
Subwoofer Driver None
Enclosure Passive Radiator
System Frequency Response 70-30k Hz
Sound Bar RMS Power 0
Subwoofer RMS Power N/A
Video Connections
HDMI Inputs None
HDMI Outputs None
Video Specs
HDMI Version N/A
HDMI Video Pass-through Resolution N/A
HDR Video Compatible N/A
Includes Remote No
Voice Control No
Control by App No
Remote IR Passthrough No
Learns TV Remote N/A
Audio Streaming
Bluetooth Connectivity No
Bluetooth Audio Playback No
Bluetooth Transmitter Mode No
Online Music Sources None
Apple AirPlay No
Chromecast built-in No
Amazon Music No
Apple Music No
Pandora No
SiriusXM No
Spotify No
TuneIn No
YouTube Music No
Files on Your Network No
Wi-Fi Networking
Built-in Wi-Fi Version None
Bands N/A
Other Info
Wall-mountable Yes
Mounting Bracket Included Optional
Sound Bar Size (inches) 5-13/16H x 61-1/2W x 3-5/8D
Sound Bar Weight 26.44 lbs
Subwoofer Size (inches) No Subwoofer
Subwoofer Weight N/A
Speaker Parts Warranty Lifetime
Speaker Labor Warranty Lifetime
Amplifier Parts Warranty N/A
Amplifier Labor Warranty N/A

Product Research


3-Channel Passive Soundbar Loudspeaker: The Monitor Audio SB-4 is a passive soundbar with three separate driver arrays for left, center, and right channels inside a single loudspeaker cabinet. Twin 4" C-CAM midrange/midbass drivers, twin ABRs (Auxiliary Bass Radiators), and a single 1" C-CAM tweeter in the center section provide the SB-4 with higher acoustic output and power handling for critical center channel reproduction. This is combined with twin 4" C-CAM midrange/midbass drivers, one ABR driver, and a 1" C-CAM tweeter for each of the left and right channels.

C-CAM (Ceramic-Coated Aluminum/Magnesium) Driver Technology: C-CAM driver technology is used throughout the Monitor Audio SB-4, providing coherent tonal balance and sonic signature across the entering audio frequency spectrum. Ceramic-Coated Aluminum/Magnesium is a material originally developed by the aerospace industry for jet engine components. Its properties are ideal for loudspeaker cones being extremely rigid, yet light enough to yield high overall efficiency. In manufacture, aluminum/magnesium alloy undergoes a three-stage stress-relieving process to remove surface deformation and molecular weakness. Once formed, the alloy driver is subjected to a high temperature anodic coating process in which a layer of pure ceramic alumina is deployed onto its surfaces to a depth of 50 microns, producing a completely rigid sandwich of alloy and heat-dissipating ceramic material. Conventional drivers are liable to flex or twist in operation, producing a significant level of audible distortion. C-CAM drivers have a much higher resistance to bending stress and therefore exhibit much greater fidelity over their entire operating range.

  • 1" C-CAM Gold Dome Tweeters: The 1" C-CAM Gold dome tweeters provide high level of performance from a compact tweeter assembly. The new tweeter vents internally through a special housing and around the outside of the magnet system into a rear loading chamber for much lower resonance and better damping. The result is more accurate, distortion-free sound at lower high frequencies. A special horn loaded face plate offers excellent integration with the bass drivers and consistent off axis performance to give uniform coverage around the room.
  • 4" Concave C-CAM Midrange/Midbass Drivers: The 4" midrange/midbass drivers feature concave C-CAM cone technology, formed from a continuous uninterrupted dish, which ensures the center section is rigid as possible for extra strength. They are driven by a specifically designed coupling assembly which adds de-coupling and significantly reduces distortion.

ABR (Auxiliary Bass Reflex) Design: The Monitor Audio SB-4 passive soundbar loudspeaker's performance is enhanced by using compact, flat diaphragm "racetrack" style Auxiliary Bass Radiators (ABRs) to provide additional bass punch, increased power handling, and removal of turbulent air noise.

MDF Cabinet w/ Seamless Cloth Grille: The Monitor Audio SB-4's cabinet is made with high-density MDF that is braced internally for maximum rigidity. The bolt through technology utilized on the bass and tweeter drivers give extra strength to create an incredibly stiff and low resonance cabinet for clear, defined audio reproduction. The speaker cabinet is finished in a special seamless cloth to provide ideal acoustical transparency, and is combined with solid brushed-aluminum ends for a seamless, elegant and discrete appearance.

  • Single Through-Bolt Mount: The drivers are individually mounted on a through-bolt which fixes at the back of the cabinet and tensions the driver at the front. Cleverly this triple-action feature braces the cabinet structure for lower box coloration while removing the need for conventional front fixings, reducing unwanted driver/cabinet resonance and simultaneously boosting aesthetics.
  • 3 Discrete Sections: Three sections (Left, Center, Rear) within the cabinet are partitioned and operate purely as discrete channels with the crossover also split in an identical way. The result is a sound bar that can play loud, clean and free from any distortion.

Gold-Plated Binding Posts: High quality, low profile, gold-plated binding posts provide an easy and trouble-free connection, with the terminals recessed neatly to enable a flush to wall installation. The gold-plated binding posts provide excellent audio signal transfer and resistance to corrosion. The binding-posts fit bare wire (up to 12AWG), pin-connectors, spade-lugs, and banana plugs (single or dual). There is a set of binding posts for the soundbar's Left, Center, and Rear channels.

Note: You'll need to remove the platic inserts from the binding-post terminals in order to insert banana plug connectors.

Mounting Options: The Monitor Audio SB-4 is custom-built for screen sizes 70" and larger. The soundbar should be centered under or above your TV. Integrated silicon feet provide secure cabinet-top mounting. The SB-4 can also be wall-mounted using an optional wall bracket (sold separately).

Note: The soundbar should be positioned as close to your TV as possible to minimize any potential "gaps" in sound, and ensuring the dialogue sound appears to originate from the TV itself.

Optional Powered Subwoofer: The SB-4 passive soundbar loudspeaker can be used with a partnering powered subwoofer (sold separately - see Accessories Tab) to provide the best possible experience and increased system power handling.

Optional Surround Speakers: Add a pair of Monitor Audio surround or bookshelf loudspeakers (sold separately - see Accessories Tab) as rear speakers for 5-channel home theater surround sound.

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Customer Q&A

4 questions already asked

Have narrowed my search to either this one or the PSB w3 sound bar. Looking for feedback on the best one for mostly TV and music and some movie watching.?
[ Chris  Apr 20, 2020 ]
1 answer
Thanks for your question. For information on comparing two or more models I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They will be able to help determine the differences and help you make the best choice for your system and your budget.
[ Krissy  May 05, 2020 ]  Staff
I see there is now 1 review - can anyone else who purchased comment on the performance? Thank You!
[ Chris  Apr 07, 2020 ]
1 answer
There are currently 3 reviews on this product! Hopefully that helps!
[ Calvin  Apr 28, 2020 ]  Staff
Can you use this speaker as just your center and have other left and right speakers?
[ Al  Apr 07, 2020 ]
1 answer
Short answer. yes. Long answer. You would have to wire all 3 sets of binging posts together, in parallel or series, which would change the total impedance. Which would most likely end up too high or too low for whatever receiver/amplifier you're using. So, could you? Technically yes. But most likely, no.
[ Michael  Apr 07, 2020 ]
Can anyone who bought the SB-4 please provide a review? I'm not finding much information online.
[ DAVE  Jan 30, 2020 ]
1 answer
There is currently a review on our website from a customer!
[ Calvin  Feb 14, 2020 ]  Staff

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