iFi Audio xDSD Gryphon silver

The xDSD Gryphon from iFi Audio is a portable digital-to-analog audio converter. It combines a high-resolution digital section with a Burr-Brown MultiBit chip and a PureWave analog section delivering 1,000 mW at 32 Ω. Designed for both high-impedance headphones and sensitive earphones, it offers 6 to 8 hours of battery life depending on use.

A chassis designed for mobility and durability

The central multifunction knob serves as both the power button, volume control, and playback control. It provides a tactile click at each volume step and includes an LED indicator that changes color according to the sound level. On the front panel, two headphone outputs sit side by side: a 3.5 mm S-Balanced mini-jack and a 4.4 mm Pentaconn balanced output. To the right of the knob, one button selects the inputs (USB, Bluetooth, S/PDIF, analog line), while another manages the XBass II and XSpace functions.

The OLED screen located on the top displays all useful information: battery level, selected source, audio format (PCM, DSD, DXD, MQA), sample rate, and digital volume. This SilentLine technology guarantees the absence of electrical interference with the audio signal, with the microcontroller activating only when a setting is changed.

Separate stages for maximum isolation

Unlike many portable DACs that concentrate all functions in a single circuit, the Gryphon physically separates three sections: Bluetooth, DAC, and amplification. This segmentation limits electrical interference between the different processing stages.

For Bluetooth 5.1 reception, iFi Audio uses the Qualcomm QCC5100 chip, compatible with all current codecs: aptX, aptX HD, aptX Adaptive, aptX Low Latency, LDAC, HWA/LHDC, AAC, and SBC. 24-bit formats are supported up to 48 kHz for aptX Adaptive and aptX HD, while LDAC and LHDC reach 96 kHz. The device stores up to seven paired Bluetooth devices. The Bluetooth processing chain includes a Global Master Clock to reduce jitter before conversion by the Burr-Brown DAC.

The 16-core XMOS processor handles digital processing, offering enough computing power to decode the most demanding formats in real time. Via USB, the Gryphon supports PCM files up to 32-bit/768 kHz, DSD up to DSD512 (22.5 MHz), DXD up to 768 kHz, and fully unfolds MQA files. The 3.5 mm coaxial S/PDIF input operates up to 24-bit/192 kHz and also accepts optical signals via a mini-Toslink adapter.

PureWave and OptimaLoop: the analog section rethought

The Gryphon’s amplification section is based on the PureWave architecture, a dual-mono balanced topology with short, direct signal paths. This approach completely separates the left and right channels to minimize crosstalk and noise. The four Direct Drive amplifiers operate with 0 V DC bias, eliminating the need for bulky coupling capacitors that could color the sound.

iFi Audio developed OptimaLoop, a multi-path negative feedback system. Rather than a global feedback loop that can generate phase shifts and group delays, OptimaLoop uses several local feedback loops, each optimized for a specific function. These loops work together to correct errors while preserving signal coherence.

The 4.4 mm balanced output delivers up to 6.7 V with more than 1000 mW at 32 Ω and 74 mW at 600 Ω. The 3.5 mm S-Balanced output reaches 3.5 V with 320 mW at 32 Ω and 40 mW at 600 Ω. This S-Balanced configuration applies the benefits of a balanced circuit to conventional unbalanced headphones. The signal-to-noise ratio exceeds 115 dB(A), while total harmonic distortion remains below 0.005% (1 V at 16 Ω).

Analog inputs and versatile use

The Gryphon includes 4.4 mm balanced and 3.5 mm unbalanced analog inputs, turning the device into a pure amplifier when connected to another source. These same connectors can also function as line outputs, allowing the Gryphon to be used as a DAC feeding an external amplifier. Volume control remains active in line output mode, and XBass II and XSpace processing also apply to the line outputs, making it possible to use the Gryphon as a preamplifier.

This flexibility extends usage scenarios beyond portable use. The Gryphon can be connected to a desktop system, used as a conversion stage between a network player and an amplifier, or simply as a headphone amplifier with a high-quality analog source.

Analog sound adjustments: XBass II, XSpace, and iEMatch

The front settings button activates XBass II and XSpace, two fully analog processing circuits that do not interfere with the digital signal. A three-position switch on the back of the device fine-tunes XBass II behavior: Bass position (bass only), Presence position (upper mids around 3 kHz), or combined Bass + Presence position.

XBass II compensates for the bass response of open-back headphones or restores low-frequency impact on certain recordings. Unlike a simple volume boost, this circuit corrects specific response dips without spilling over into the rest of the spectrum. The Presence function targets the upper midrange to give more presence to voices and instruments in that range.

XSpace widens the soundstage to counter the “in-the-head” localization effect typical of headphone listening. This analog circuit recreates spatialization close to that of speaker listening, adding air and depth to the stereo image. Depending on the recordings and listening preferences, XSpace can make music sound less confined.

The iEMatch switch located underneath the device selects the 3.5 mm or 4.4 mm output to apply attenuation specifically for very sensitive in-ear monitors. This function eliminates audible hiss that can appear with certain IEMs without sacrificing dynamic range or maximum output level. Three positions are available: Off, 3.5 mm, or 4.4 mm.

Digital filters and sound customization

The menu accessible via the settings button offers three digital filters that act on signal reconstruction: Bit-Perfect (BP), Standard (STD), and GTO (Gibbs Transient Optimised). The Bit-Perfect filter preserves the signal without modification, retaining the original recording as much as possible. The Standard filter applies moderate filtering, while the GTO filter oversamples up to 384/362 kHz with no pre-ringing, minimal filtering, and limited post-ringing.

These filters make it possible to subtly adjust the sound character according to personal preferences or the equipment used. The GTO filter is particularly suitable for listeners sensitive to reconstruction artifacts, while Bit-Perfect mode satisfies those seeking absolute transparency.

Power supply and charging management

The high-density 3600 mAh lithium-polymer battery recharges via the dedicated USB-C port, accepting up to 1900 mA with BC V1.2 fast charging. A full charge takes about three hours. Battery life varies between six and eight hours depending on the load of the headphones used and the listening level.

A menu allows the power source to be configured, optionally separating power and signal in a desktop setup. This separation can improve sound quality by isolating power from audio data. The device features two USB-C ports: one for charging, the other for audio data. Dual Port mode keeps the battery charged at 3.88 V when the Gryphon is connected to a computer, avoiding repeated charge-discharge cycles.

Evolution compared with the original xDSD

The xDSD Gryphon succeeds the xDSD launched in 2018 and the xCAN, a complementary portable amplifier. iFi Audio merged the functions of these two devices into the Gryphon while adding extra capabilities. The original model had no OLED screen, used a less capable DAC, and offered lower amplification power.

The Gryphon improves the soundstage, a weak point of the original xDSD, which could sound confined. Instrument separation and transparency have also improved, while the sonic body remains fuller. The chassis has been upgraded in finish, with an anti-smudge surface treatment and more robust construction. Preinstalled rubber feet stabilize the device on a flat surface.

The user interface benefits from a complete redesign with the addition of the OLED screen and CyberSync OS, making navigation more intuitive. New features such as XBass II adjustment (bass only, presence only, or combination) and digital filter selection expand customization possibilities.

Technical specifications

Additional features

• OLED display for viewing audio formats and levels
• Analog volume control via multifunction knob
• Analog sound customization
  • Bass Boost
  • XSpace headphone spatialization for an immersive experience
• Built-in iEMatch: compatible with all in-ear headphones, even very sensitive ones
• High-end components: Murata, KEMET, ALPS, Texas Instruments
  • Ultra-low-noise power supply
  • High-fidelity audio circuits

Audio formats and resolution

• PCM: up to 32 bits / 768 kHz, 705.6 kHz, 384 kHz, 352.8 kHz, 192 kHz, 176.4 kHz, 96 kHz, 88.2 kHz, 48 kHz, 44.1 kHz via USB
• Native DSD: DSD512, DSD256, DSD128, DSD64
• DXD: 768 kHz, 705.6 kHz, 384 kHz, 352.8 kHz
• Full MQA: up to 384 kHz, 352.8 kHz
• High-resolution Bluetooth: up to 96 kHz
  • Supported codecs: aptX HD, aptX Adaptive, LDAC, HWA / LHDC, AAC, SBC
  • Bluetooth 5.1 module at 96 kHz

Connectivity and inputs

• USB-C port
• Bluetooth 5.1
• Coaxial S/PDIF input
• Analog inputs
  • Balanced: 4.4 mm jack
  • Unbalanced: 3.5 mm jack

Digital-to-analog conversion

• Burr-Brown bit-perfect DSD and DXD converter
• Selectable digital filters: bit-perfect (BP), GTO, standard (STD)
• PureWave architecture: balanced dual-mono analog circuit for exceptional linearity and ultra-low distortion
• OptimaLoop technology: optimized multi-path negative feedback

Line outputs

• Balanced output
  • Maximum voltage: 6.7 V (variable)
  • Output impedance: ≤ 200 Ω
  • Signal-to-noise ratio: ≥ 110 dB(A)
  • THD+N: ≤ 0.007%
• Unbalanced output
  • Maximum voltage: 3.5 V (variable)
  • Output impedance: ≤ 100 Ω
  • Signal-to-noise ratio: ≥ 110 dB(A)
  • THD+N: ≤ 0.015%

Headphone outputs

• Balanced output
  • Maximum voltage: 6.7 V at 600 Ω
  • Output power: > 1,000 mW at 32 Ω, > 74 mW at 600 Ω
  • Output impedance: < 1 Ω
  • Signal-to-noise ratio: 116 dB(A)
  • THD+N: < 0.005% (1 V at 16 Ω)
• Unbalanced output
  • Maximum voltage: 3.5 V at 600 Ω
  • Output power: > 320 mW at 32 Ω, > 40 mW at 300 Ω
  • Output impedance: < 1 Ω
  • Signal-to-noise ratio: 115 dB(A)
  • THD+N: < 0.005% (1 V at 16 Ω)

Battery and power supply

• High-density lithium-polymer battery
• USB-C charging compliant with BC V1.2
• Charging current: up to 1,900 mA

Dimensions and weight

• Dimensions: 123 x 75 x 19 mm
• Weight: 215 g