DEVIALET Phantom Ultimate 98 dB Light Pearl stereo

Phantom Ultimate 98 dB is the new generation of Devialet 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 under 3 liters, with sound reproduction covering frequencies from 18 Hz to 25 kHz.

A concentration of patented technologies in service of sound

Phantom Ultimate 98 dB packs the full technological arsenal developed by Devialet since its founding in 2007. At the heart of this speaker beats next-generation ADH (Analog Digital Hybrid) technology, an innovation that for the first time marries the refinement and linearity of Class A analog amplification with the power and energy efficiency of Class D digital amplification.

This hybridization works on a principle similar to 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 zero thermal distortion thanks to constant dissipated power. The improved control algorithm between the analog and digital stages now makes it possible to reach frequencies up to 25 kHz 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 sub-bass range. Two back-to-back aluminum woofers in a push-push configuration generate powerful lateral excursion under high pressure in the sealed enclosure. This unique configuration produces bass with a striking physical impact that 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 being played. From whispered dialogue to cinematic explosions, every sonic detail keeps its place in the mix without ever compromising 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, a cast aluminum core acts as a backbone, capable of withstanding the colossal mechanical stresses generated by the drivers during dynamic passages.

Assembly is performed under 1.2 tons of pressure, ensuring perfect sealing of the structure to aeronautical standards. The 2.5 mm woofer gasket is compressed with an equivalent force to guarantee the 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 full-range aluminum transducer handles mids and highs with optimized directivity, while the two stamped-aluminum lateral woofers offer maximum radiating surface in minimal space. Each diaphragm is individually tested before assembly to guarantee absolute compliance with acoustic specifications.

The manufacturing process includes 50 quality control tests, from individual components to the finished product. Every Phantom Ultimate is tested in an anechoic chamber where its performance is measured and calibrated to match Devialet’s exact standards. This manufacturing rigor, with 30% of production time dedicated to quality control, guarantees 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 an NXP i.MX 8M Nano quad-core SoC clocked at 1.5 GHz. This robust software platform handles all high-resolution streaming protocols available on the market.

Wireless connectivity is built on dual-band Wi-Fi 5 (2.4 and 5 GHz) with 2×2 MIMO for stable transmission even in crowded 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 (RAAT) certification places this speaker among audiophile-grade equipment compatible with this music management platform favored by discerning listeners. Inter-speaker synchronization via the proprietary Devialet DOS 3 protocol enables stereo pairing with microsecond-level timing precision, creating a coherent, spatially 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 for direct connection to a high-resolution source. The Ethernet RJ45 port ensures a stable network connection for high-definition streaming without the vagaries of Wi‑Fi.

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 reduce bass intensity in apartments, and adjustable latency for perfect lip-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 introducing subtle refinements. This geometry is not just aesthetic: it optimizes omnidirectional acoustic dispersion while minimizing internal standing waves. The metallic side panels, available in glossy or matte finishes depending on the colorway, add a touch of sophistication while contributing to structural rigidity.

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

Integrated capacitive touch controls on top provide direct control of volume, playback, and Bluetooth pairing without resorting to the app. A discreet LED indicator shows operating status: off, starting up (blinking), or operational (solid white). This ease of use hides 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 unleashed 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 offers 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 deliver enhanced connectivity with the addition of Google Cast and Tidal Connect. New aluminum drivers replace the ABS ones of Phantom II 98 dB, offering greater rigidity and reduced distortion. The internal structure with a cast 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 (sleek single-leg) 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 to 90 cm off the floor to maximize impact and dispersion. Keep at least 30 cm from walls to allow low frequencies to develop naturally without creating troublesome standing waves. The area in front of the speaker should remain clear for optimal sound propagation. The ideal listening distance is between 1.5 and 2.5 meters. In a stereo setup, 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 use thanks to several advantages. The optical input allows direct connection to a TV for sound vastly superior to built-in speakers. AVL technology automatically adjusts dynamics to balance dialogue and sound effects. The latency adjustment feature in the app ensures perfect synchronization between picture and sound. In stereo configuration, spatialization effectively reproduces cinematic ambiance, though it won’t replace a true multichannel system for surround purists.

Are software updates frequent? Devialet actively maintains the DOS 3 system with regular updates that bring new features and performance improvements. Updates install automatically via Wi‑Fi or can be triggered manually from the app. The history shows the gradual 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 technologically cutting-edge, unlike traditional hi-fi systems frozen in their original specifications.

Technical specifications

Design and materials

• Configurations: mono or stereo (paired with another speaker)
• Dual-injection composite enclosure
  • Inner layer: fiberglass-reinforced polycarbonate
  • Outer layer: ABS
  • Die-cast 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