Putting a television above a fireplace is one of those design decisions that refuses to die.
Homeowners like the clean look. Interior designers like the symmetry. Custom installers are then asked to figure out where the soundbar goes without making the finished room look like someone bolted an audio component to the front of the mantel as an afterthought.
NextLevel Acoustics thinks it has a better answer.
The new NextLevel Acoustics Mantelbar lineup integrates audio directly into the fireplace mantel, with two versions aimed at very different installations. The $2,999 Mantelbar for Sonos Arc conceals the soundbar inside a hollow center cavity, while the Mantelbar with integrated Nextlevel Acoustics Cinema Series loudspeakers starts at $4,750 for a fully passive architectural audio solution using forward-facing drivers.
Both models are completely solid across the top. There is no opening above the Mantelbar, which makes the Sonos version considerably more interesting because the Arc’s height drivers cannot simply fire upward into the room.
NextLevel’s solution is a custom internal waveguide that redirects the Arc’s upward-firing channels through the front-facing grille.
That is the clever part.
Hiding a Sonos Arc Ultra soundbar inside a mantel is one thing. Giving its Atmos drivers somewhere useful to go is another.
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Two Versions, Two Very Different Systems
The Sonos version is aimed at clients who want the simplicity and ecosystem integration of the Arc but do not want to see it.
The second Mantelbar dispenses with Sonos altogether and integrates the loudspeaker technology from NextLevel’s Cinema Series directly into the mantel. According to the company, that version uses 5.5-inch drivers and 1-inch tweeters and is intended to provide the output, dynamics, and coverage of a dedicated theater loudspeaker without requiring a visible speaker cabinet.
The Mantelbar product page says its integrated speaker version can be configured as a stereo pairs, or a three-channel version with left, center, right speaker placement. It is rated for amplifiers from 40 to 400 watts and can reach a claimed 110dB max SPL. In other words, this is not just a decorative Sonos enclosure with a more expensive sibling. One version hides an active consumer soundbar. The other turns the mantel itself into the loudspeaker.
And Yes, NextLevel Already Makes Its Own Soundbars
NextLevel Acoustics is hardly new to hiding serious loudspeaker hardware beneath large displays.
The company already offers an extensive Fusion Soundbar lineup, including models designed for Samsung Frame TVs, ultra-slim installations, large projection screens, and custom-width applications. The lineup can be configured as LCR, stereo, or center-channel systems with a variety of finishes and grille fabrics.
Its Cinema Soundbar sits even closer to the Mantelbar’s performance ambitions. The passive system can be configured as LCR or stereo and uses 6.5-inch drivers with 4 x 4-inch compression horns. NextLevel specifies 93dB sensitivity for the LCR configuration, a 45Hz-to-20kHz response, and custom sizing for displays starting at 75 inches.
So why create Mantelbar at all?
Because even a beautifully made custom soundbar is still a visible soundbar.
The new design is for projects where the audio has to disappear into the architecture rather than merely coordinate with it.
Design & Finish Options
Both Mantelbar versions are intended to replace or function as the traditional fireplace mantel rather than sit underneath one. The company says the units can be tailored to match a room’s architectural finishes while maintaining a built-in appearance. That makes sense for the custom-install market, where telling a client that the speaker is “only available in black” can sometimes derail a project faster than explaining the price.
Mantelbar Specifications
Mantelbar with Integrated Loudspeakers
- Starting MSRP: $4,750
- System Type: Passive architectural loudspeaker integrated directly into the mantel
- Construction: Solid throughout; no hollow soundbar cavity
- Driver Orientation: Forward-facing only
- Height Drivers: None
- Configurations: Stereo or LCR
- Woofers: 4 x 5.5-inch Carbon Wool Cone drivers in Stereo / 6 x 5.5-inch in LCR
- Tweeters: 2 x DX in Stereo / 3 x DX in LCR
- Frequency Response: 55Hz–20kHz
- Sensitivity: 92dB
- Impedance: 4 ohms
- Recommended Amplifier Power: 40–400 watts
- Maximum SPL: 110dB at 1 meter
- Grille: Front-facing removable magnetic grille
- Finish Options: High Gloss Black, Matte Black, Walnut, Red Oak, Natural Cherry, and custom grille fabrics
NextLevel says the Cinema Series Mantelbar uses the same 5.5-inch Carbon Wool Cone driver technology and high-performance tweeters found in its dedicated Cinema 5 loudspeaker, but adapts the system to a custom mantel enclosure.
Mantelbar for Sonos Arc
- Starting MSRP: $2,999
- Purpose: Conceals a Sonos Arc Ultra inside the mantel
- Construction: Solid top with hollow center cavity for the Arc
- Height-Channel Handling: Internal waveguide redirects the Arc’s upward-firing speakers through the front grille
- Driver System: Supplied by the Sonos Arc
- Grille: Front-facing architectural grille
- Finish Options: Custom finishes and designer grille fabrics
- Shipping Status: Shipping now
Fireplace Installation Warning
One specification matters more than the grille fabric: Mantelbar does not incorporate special heat-resistant materials or thermal protection. NextLevel places responsibility for fireplace clearances, ventilation, heat management, local codes, and compliance with the fireplace manufacturer’s requirements on the installer. Heat-related damage is not covered by warranty.
The Bottom Line
The NextLevel Acoustics Mantelbar solves a very specific custom-install problem: how do you put serious audio into a fireplace wall without hanging a soundbar underneath the television or cutting visible speakers into the architecture?
The $2,999 Sonos Arc version is the more unusual of the two because the top remains completely solid. NextLevel hides the soundbar inside the mantel and uses an internal waveguide to redirect its upward-firing Atmos channels through the front grille.
The $4,750+ Cinema version takes the more traditional high-performance route, replacing the hidden soundbar with forward-facing passive loudspeakers that can become part of a larger theater system.
Neither is inexpensive, and neither is really intended for DIY buyers. But for integrators designing around a fireplace where the client wants the speakers to disappear, Mantelbar offers something most soundbars cannot: the audio becomes part of the architecture instead of something bolted onto it afterward.
That’s the real reason to consider one.
For more information: nextlevelacoustics.com
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