iFi Audio iDSD Valkyrie gold

The iFi iDSD Valkyrie represents a significant advancement in the world of portable audio converters. This new flagship from iFi Audio combines technologies previously reserved for professional studios with a sophisticated portable design. Equipped with four Burr-Brown converters in a hybrid multi-bit configuration, the Valkyrie promises to reveal sound nuances imperceptible with conventional equipment. Its exceptional amplification power of 5,700 mW, coupled with an impressive 18-hour battery life, makes it a versatile device suitable for both on-the-go audiophiles and demanding home listeners.

Exceptional Technical Architecture

At the heart of the Valkyrie are four Burr-Brown DACs configured in a hybrid multi-bit architecture, a technical choice that stands out from the more commonly used ESS chips. This configuration offers remarkable linearity on low-amplitude signals, enabling precise reproduction of the subtlest details and micro-nuances in recordings. This more complex and costly technical approach partly justifies the device’s premium positioning.

The Valkyrie’s major innovation lies in the integration of K2HD technology, developed by JVC-Kenwood and previously reserved for professional environments. This proprietary technology aims to restore the sound characteristics of original recordings by compensating for losses inherent in the compression and digital distribution process. While some experts express legitimate skepticism about the promises of “remastering,” initial user feedback suggests tangible improvements in harmonic richness and spatial definition.

The system also includes a DSD remastering algorithm capable of converting standard audio files into DSD512 or DSD1024 formats, considered ultra-high resolution. This signal transformation is managed by a custom FPGA system that minimizes distortions while preserving musical integrity.

Uncompromising Sound Customization

The Valkyrie stands out with its exceptional sound customization capabilities. Six distinct digital filters (Apodizing, GTO, Bit Perfect, Standard, Minimum, and Transient Aligned) allow users to adjust the sound signature according to listening preferences and the characteristics of associated equipment.

Unlike most DACs on the market that use digital signal processors (DSP) to modify sound, the Valkyrie favors an analog approach for its equalization modes. This method, more complex to implement, better preserves signal integrity and offers a more natural and organic frequency adjustment.

Three proprietary iFi technologies further enhance customization possibilities:

• XSpace expands the soundstage to create a more spacious and airy impression.
• XBassII enhances low frequencies, particularly useful with headphones that naturally lack bass.
• XPresence highlights midrange frequencies to enhance the presence of voices and melodic instruments.

This combination of technologies allows for fine-tuning of sound reproduction to suit each musical genre, listening environment, or mood, without ever compromising the fundamental quality of the signal.

Comprehensive Connectivity for Maximum Versatility

The Valkyrie excels with its exhaustive connectivity, covering all the needs of modern audiophiles. On the digital input side, the device features a USB-C port and an S/PDIF input compatible with optical and coaxial signals. Wireless connectivity is ensured by Bluetooth 5.4, supporting the most advanced high-resolution codecs: aptX Lossless, aptX Adaptive, LDAC, AAC, and SBC.

For connecting headphones and earphones, the Valkyrie offers balanced (4.4 mm) and unbalanced (3.5 mm) analog outputs capable of delivering enough power to drive all types of headphones on the market, including the most demanding planar models. RCA outputs also allow the Valkyrie to be integrated into a traditional hi-fi system or connected to powered speakers.

The audio format compatibility is impressive, with native support up to 32-bit/768 kHz in PCM and DSD512, extendable to DSD1024 via the remastering system. This technical versatility ensures the Valkyrie remains future-proof in the face of the constant evolution of high-resolution audio formats.

Battery Life and Ergonomics: Power Without Compromise

Despite its advanced technical capabilities, the Valkyrie manages to offer remarkable battery life thanks to its 20,000 mAh lithium-polymer battery. With up to 18 hours of continuous use, the device can accompany users throughout an entire day of listening without needing a recharge. The recharge time of just 2.5 hours minimizes downtime, and the fast-charging technology allows for several hours of battery life to be regained in just a few minutes.

For extended listening sessions at home, the “PowerX” power supply included with the device features an active noise cancellation system to minimize electrical interference that could affect sound quality. This dual approach—battery or mains power—provides appreciable flexibility depending on the usage context.

With dimensions of 172 x 160 x 30 mm and a weight of 882 grams, the Valkyrie is not an ultra-compact device but remains easily transportable in a bag. Its design subtly evokes the wings of a Valkyrie horse, a reference to the Norse mythology that inspired its name.

Technical specifications

Key features

• JVCKENWOOD K2HD technology for rich, emotional sound
• DSD1024 remastering that turns every audio file into a near studio‑master experience
• 4 interleaved Burr-Brown DACs for maximum fidelity
• Power and flexibility for all headphones and in-ear monitors, even the most demanding
• Lossless Bluetooth and hi‑res compatibility
• Support for xMEMS drivers
• 20,000 mAh battery for 18 hours of battery life
• Fast charging via USB-C

Audio architecture and digital-to-analog conversion

• Quad-DAC architecture with four Burr-Brown DSD1793 in a hybrid multi-bit configuration
• DSD1024 remastering via custom FPGA
• JVCKENWOOD K2HD technology
• K2 and K2HD modes for faithful, emotionally engaging sound reproduction
• 6 digital filters for fine sound control: Bit-Perfect, Standard, Minimum, GTO, Apodising, Transient Aligned

Outputs and power

• Headphone output
  • 4.4 mm (balanced)
  • 3.5 mm (S-Bal)
• Line output: 4.4 mm, 3.5 mm, RCA
• Output impedance
  • 4.4 mm: ≤ 0.3 Ω
  • 3.5 mm: ≤ 0.2 Ω
• Output power
  • Up to 2258 mW RMS into 64 Ω
  • Maximum power: 5700 mW

Connectivity and supported formats

• Digital inputs: USB-C, S/PDIF (optical / coaxial), Bluetooth 5.4
• Supported audio formats
  • PCM up to 768 kHz
  • Native DSD512
  • DSD1024 remastered
• Bluetooth codecs: aptX Lossless, aptX Adaptive, LDAC, LHDC / HWA, AAC, SBC
• Lossless Bluetooth for uncompromised listening
• Support for xMEMS drivers for ultra-fast in-ear monitors

Power and battery life

• 20,000 mAh battery (equivalent to EV batteries)
• Battery life: up to 18 hours
• USB-C PD / QC3.0 20 V fast charge: 2.5 hours
• Battery or mains operation with iPowerX and ANC for ultra-quiet power

Processing and features

• Analog processing: XBassII, XSpace, XPresence
• Touch interface with Gorilla Glass
• Solid aluminum buttons
• Control wheel inspired by watch crowns

Construction and design

• CNC-machined aluminum finish
• Retro champagne anodization for a timeless aesthetic
• Design inspired by the majestic wings of the Valkyrie and the SR-71 Blackbird
• Premium finish combining aesthetics and ergonomics

Dimensions and weight

• Dimensions: 172 x 160 x 30 mm
• Weight: 882 g

Comparison of iFi portable amplifiers

• iDSD Valkyrie
  • Effective power: 2258 mW
  • DAC: 4x Burr-Brown
  • Bluetooth: aptX Lossless, LDAC, LHDC / HWA
  • Digital filters: 8 (including K2 / K2HD)
• iDSD Diablo 2
  • Effective power: 2060 mW
  • DAC: 2x Burr-Brown
  • Bluetooth: aptX Lossless, LDAC
  • Digital filters: 4
• xDSD Gryphon
  • Effective power: 1000 mW
  • DAC: 1x Burr-Brown
  • Bluetooth: aptX, LDAC
  • Digital filters: 4