DEVIALET Phantom Ultimate 98 dB Paris Opera stereo

Phantom Ultimate 98 dB is Devialet’s new generation of connected speakers. This compact acoustic sphere, designed and assembled in France, is the result of over 15 years of research and development. It delivers 400 watts of power in a volume of under 3 liters, with sound reproduction covering frequencies from 18 Hz to 25 kHz.

A concentration of patented technologies in the service of sound

Phantom Ultimate 98 dB packs the full suite of technologies Devialet has developed since its founding in 2007. At the heart of the speaker beats next‑generation ADH (Analog Digital Hybrid) technology, an innovation that combines the refinement and linearity of Class A analog amplification with the power and energy efficiency of Class D digital amplification.

This hybridization works much like automotive power steering: the analog amplifier imposes the output voltage with absolute precision, while the digital amplifiers supply the required current. The result? Amplification with no passive components in the audio signal path, a natural bandwidth extending up to 5 MHz, and no thermal distortion thanks to constant dissipated power. The improved control algorithm between the analog and digital stages now enables frequencies up to 25 kHz to be reached with remarkable clarity.

SAM (Speaker Active Matching) technology is the second pillar of this speaker. This algorithm adapts the audio signal in real time to the physical characteristics of the drivers, preserving their acoustic signature while protecting them. SAM continuously analyzes transient and steady‑state signals to reproduce phase and amplitude with striking precision, ensuring perfect time alignment between the recorded signal and the generated pressure wave.

The HBI (Heart Bass Implosion) system allows this compact speaker to reach as low as 18 Hz in the infra‑bass range. Two aluminum woofers, mounted push‑push back‑to‑back, generate powerful lateral excursion under high pressure inside the sealed enclosure. This unique configuration delivers bass with a gripping physical impact you feel as much as you hear.

AVL (Adaptive Volume Level) technology, inherited from the Devialet Dione soundbar, dynamically adjusts EQ in real time according to the content. From whispered dialogue to cinematic explosions, every sonic detail holds its place in the mix without losing intelligibility.

Meticulous construction for uncompromising acoustics

The structure of Phantom Ultimate 98 dB reflects a manufacturing approach where every detail matters. Its bi‑injected composite shell combines an inner layer of glass‑fiber‑reinforced polycarbonate for structural rigidity with an outer ABS layer to absorb parasitic vibrations. At the center, an injected aluminum core acts as a spine capable of withstanding the colossal mechanical stresses generated by the drivers during dynamic passages.

Assembly is performed under 1.2 tonnes of pressure, ensuring perfect sealing of the structure to aeronautical standards. The 2.5 mm woofer gasket is compressed with equivalent force to guarantee total airtightness of the sealed enclosure. This construction maintains consistent acoustic performance even during long listening sessions at high volume.

The drivers themselves are feats of engineering. The wideband aluminum transducer handles mids and highs with optimized directivity, while the two lateral stamped‑aluminum woofers offer maximum radiating surface within a minimal footprint. Each diaphragm is individually tested before assembly to ensure absolute compliance with acoustic specifications.

The manufacturing process includes 50 quality control tests, from individual components to the finished product. Every Phantom Ultimate goes through an anechoic chamber where its performance is measured and calibrated to match Devialet’s exacting standards. This manufacturing rigor, with 30% of production time dedicated to quality control, ensures consistent performance from one unit to the next.

A connected ecosystem built for the streaming era

Phantom Ultimate 98 dB integrates seamlessly into the modern digital world thanks to the DOS 3 operating system, powered by a quad‑core NXP i.MX 8M Nano SoC clocked at 1.5 GHz. This robust software platform handles all high‑resolution streaming protocols available on the market.

Wireless connectivity relies on dual‑band Wi‑Fi 5 (2.4 and 5 GHz) with 2×2 MIMO for stable transmission even in congested environments. Bluetooth 5.2 with SBC and AAC codecs enables direct connection from any mobile device. The speaker natively supports AirPlay for the Apple ecosystem, Google Cast for Android, as well as Spotify Connect, Tidal Connect, and UPnP for direct access to streaming services.

Roon Ready certification (RAAT) places this speaker among audiophile‑grade equipment compatible with this highly regarded music management platform. Inter‑speaker synchronization via Devialet’s proprietary DOS 3 protocol enables stereo pairing with microsecond‑level timing precision, creating a coherent, well‑defined soundstage. In stereo configuration, sound pressure level reaches 101 dB SPL, turning listening into a true sonic spectacle.

The mini‑TOSLINK optical input accepts digital signals up to 24‑bit / 192 kHz, enabling direct connection of a high‑resolution source. The Ethernet RJ45 port guarantees a stable network connection for high‑definition streaming without Wi‑Fi fluctuations.

The completely redesigned Devialet app offers an intuitive interface for setup and control. Beyond basic operation, it includes a 6‑band parametric EQ to fine‑tune output to your room’s acoustics, a night mode to tame bass in apartments, and adjustable latency for perfect A/V sync in home theater use.

Iconic design and exceptional finishes

The spherical form of Phantom Ultimate continues a visual signature that has become emblematic since 2015, while adding subtle refinements. This geometry isn’t just aesthetic: it optimizes omnidirectional acoustic dispersion while minimizing internal standing waves. The metal side panels, available in glossy or matte finishes depending on colorway, add sophistication while contributing to structural rigidity.

Three finishes are offered to harmonize with different interiors. Light Pearl sports a soft matte white evoking ceramic bisque, with pearlescent side plates that subtly catch the light. Deep Forest offers a deep dark green, almost black depending on lighting, with bright metallic accents. A special Opéra de Paris edition, the fruit of a partnership initiated in 2017 with the prestigious institution, is adorned with genuine gold leaf on the sides, transforming the speaker into a sonic work of art.

Capacitive touch controls on top provide direct control of volume, playback, and Bluetooth pairing without the app. A discreet LED indicator shows operating status: off, booting (blinking), or operational (steady white). This ease of use belies the underlying technological complexity.

The visual spectacle of the moving side woofers is a Devialet signature. During bass‑heavy passages, the convex diaphragms pulse hypnotically, physically materializing the deployed sonic energy. This mechanical ballet, visible from several meters away, turns listening into a multisensory experience.

Frequently Asked Questions

What’s the difference between Phantom Ultimate 98 dB and the previous Phantom II model? Phantom Ultimate brings substantial improvements over the Phantom II generation. The next‑gen ADH delivers better thermal and energy management, enabling more precise highs up to 25 kHz versus 21 kHz previously. The new NXP i.MX 8M processor and DOS 3 system provide richer connectivity with the addition of Google Cast and Tidal Connect. New aluminum drivers replace the Phantom II 98 dB’s ABS units, offering greater rigidity and reduced distortion. The internal structure with an injected‑aluminum core significantly improves mechanical stability under heavy load.

Which accessories are compatible with this speaker? Phantom Ultimate 98 dB is compatible with the Tree stand (an elegant single‑leg base) and the Gecko wall mount for discreet installation. The Devialet Remote allows precise control without a smartphone. Accessories from the previous Phantom II range, such as the Cocoon carry case, remain compatible despite potential finish differences. Note that the Devialet Arch support is not compatible with this new generation. For optimal listening, Devialet strongly recommends using Treepod stands, which position the speaker at the ideal height while decoupling vibrations from the floor.

How can I optimize speaker placement in a room? Placement plays a crucial role in acoustic performance. Position the speaker 45–90 cm off the floor to maximize impact and dispersion. Maintain at least 30 cm from walls to allow low frequencies to develop naturally without problematic standing waves. Keep the space in front of the speaker clear for optimal sound propagation. The ideal listening distance is between 1.5 and 2.5 meters. In stereo, space the speakers 2 to 3 meters apart, forming an equilateral triangle with the listening position.

Is this speaker suitable for home theater use? Phantom Ultimate 98 dB excels in home theater thanks to several strengths. The optical input enables direct connection to a TV for sound far superior to built‑in speakers. AVL technology automatically adjusts dynamics to balance dialogue and effects. The app’s latency setting ensures perfect lip‑sync. In stereo configuration, spatialization effectively recreates cinematic ambiance, though it doesn’t replace a true multichannel system for surround purists.

Are software updates frequent? Devialet actively maintains DOS 3 with regular updates that bring new features and performance improvements. Updates install automatically over Wi‑Fi or can be triggered manually from the app. History shows the progressive addition of streaming protocols (Google Cast and Tidal Connect were absent at launch), audio functions (6‑band EQ), and acoustic optimizations. This evolutionary approach ensures your investment remains at the technological cutting edge, unlike traditional hi‑fi systems fixed to their original specifications.

Technical specifications

Design and materials

• Configurations: mono or stereo (paired with another speaker)
• Bi-injected composite enclosure
  • Inner layer: glass fiber–reinforced polycarbonate
  • Outer layer: ABS
  • Injection-molded aluminum central core

Exclusive technologies

• Next-generation ADH (Analog Digital Hybrid)
• SAM (Speaker Active Matching)
• HBI (Heart Bass Implosion)
• AVL (Active Volume Limiter)
• DAC Magic Wire
• Devialet ASIC
• DOS 3 operating system

Drivers

• 1 × aluminum full-range driver
• 2 × aluminum woofers

Audio performance

• Total amplification power: 400 W
• Maximum sound pressure level: 98 dB SPL at 1 m
• Frequency response: 18 Hz – 25 kHz (±6 dB)
• Noise floor: 0 dB SPL at 1 m
• Audio inputs: up to 24-bit / 192 kHz
• DSP: 32-bit / 96 kHz
• Processor: NXP i.MX 8M Nano SoC – Quad-core 1.5 GHz

Connectivity

• Wi‑Fi: Wi‑Fi 5 (802.11 a / b / g / n / ac) – 2×2 MIMO (2.4 and 5 GHz)
• Ethernet: RJ45 (100 / 1000 Mbps)
• Inter-speaker connection: Devialet DOS 3 protocol (96 kHz / 24-bit)
• Optical input: 1 × mini‑TOSLINK
• Streaming services
  • AirPlay
  • Google Cast
  • Spotify Connect
  • Tidal Connect
  • UPnP
  • Roon Ready (RAAT)
• Bluetooth 5.2 (A2DP and AVRCP profiles, SBC and AAC codecs)

Power

• Voltage: 100–240 V ~ 50 / 60 Hz
• Power consumption
  • Off: < 0.5 W
  • Standby: < 2 W

Dimensions and weight

• Speaker: 157 × 219 × 168 mm (W × D × H)
• Weight: 4.3 kg
• Packaging: 210 × 285 × 250 mm – 5 kg

Box contents

• 2 Devialet Phantom Ultimate 98 dB
• Power cable
• Documentation