iFi iDSD GR 2

The iFi iDSD GR 2 is a true-portable DAC and headphone amplifier designed for high-performance listening at home or on the move. It combines a Burr-Brown PCM1795 DAC, fully balanced Class A amplification, powerful headphone outputs, Bluetooth 5.4 with aptX Lossless, digital and analogue inputs, and battery operation in a compact chassis. The GR 2 supports PCM up to 768kHz and DSD512, while its balanced 4.4mm headphone output delivers up to 1,513mW RMS at 32 ohms. Upgraded iEMatch circuitry helps accommodate sensitive earphones, giving the GR 2 flexibility across a broad range of headphones and IEMs. Wireless listening is handled by Bluetooth 5.4 with support for aptX Lossless, aptX Adaptive, LDAC, LHDC/HWA, aptX, AAC, and SBC. Wired sources can connect through USB-C or optical/coaxial S/PDIF, while balanced 4.4mm and single-ended 3.5mm analogue inputs allow the GR 2 to operate as an analogue headphone amplifier as well as a DAC/amp. The GR 2 also incorporates JVCKENWOOD's K2HD technology, designed to restore harmonic information lost during digital recording and processing. A selectable K2 mode provides similar enhancement without upsampling. A capacitive colour OLED touchscreen provides direct access to core settings, while iFi Nexis compatibility extends control and firmware-update functionality through the app. For desktop listening, hybrid power mode prioritizes external USB-C power and draws from the internal battery when additional power is required. With a 4,900mAh lithium-polymer battery providing approximately seven hours of operation, the iDSD GR 2 combines portable convenience with the connectivity and amplification capability needed to serve as part of a desktop headphone system. Burr-Brown PCM1795 DAC The GR 2 is iFi's first DAC to use the Burr-Brown PCM1795 current-output chipset. It supports PCM up to 768kHz and DSD512 and gives iFi greater flexibility in the design of the accompanying analogue output stage. Fully Balanced Class A Amplification The analogue stage uses Class A op-amps and a fully balanced signal path. The balanced headphone output delivers up to 1,513mW RMS at 32 ohms, while upgraded iEMatch circuitry helps accommodate sensitive headphones and IEMs. Bluetooth 5.4 with aptX Lossless Bluetooth 5.4 provides wireless playback with aptX Lossless for compatible devices, along with aptX Adaptive, LDAC, LHDC/HWA, aptX, AAC, and SBC. aptX Lossless supports CD-quality 44.1kHz/16-bit wireless playback when used with a compatible source and suitable connection conditions. K2HD Technology Developed by JVCKENWOOD, K2HD is designed to restore harmonic information lost during the digital recording process. The GR 2 also provides a K2 mode that offers enhancement without upsampling, allowing listeners to choose whether to use the processing according to the recording and their preferences. Portable & Desktop Operation The internal 4,900mAh battery provides approximately seven hours of portable operation. When external USB-C power is connected, hybrid power mode prioritizes the external supply and draws from the battery when additional power is required. KEY FEATURES Burr-Brown PCM1795 DAC — Current-output DAC architecture supporting high-resolution digital playback. PCM 768kHz & DSD512 — Supports high-resolution PCM and DSD music libraries. Up to 1,513mW Balanced Output — Provides substantial headphone-driving capability from the 4.4mm balanced output. Fully Balanced Class A Amplification — Class A op-amps and a balanced signal path form the GR 2's analogue amplification stage. Bluetooth 5.4 with aptX Lossless — Supports aptX Lossless, aptX Adaptive, LDAC, LHDC/HWA, aptX, AAC, and SBC. K2HD Technology — JVCKENWOOD processing designed to restore harmonic information lost during digital recording. Upgraded iEMatch — Helps optimize operation with sensitive headphones and IEMs. Colour OLED Touchscreen — Capacitive touchscreen provides direct access to core controls and settings. Digital & Analogue Inputs — USB-C, S/PDIF, Bluetooth, balanced 4.4mm analogue, and single-ended 3.5mm analogue connectivity. Hybrid Power Mode — Intelligently combines external USB-C power with battery operation. 4,900mAh Battery — Provides approximately seven hours of portable listening. iFi Nexis Compatible — Provides additional control and over-the-air update functionality. CONNECTIVITY & COMPATIBILITY Digital Inputs USB-C S/PDIF optical/coaxial Bluetooth 5.4 Analogue Inputs 4.4mm balanced 3.5mm single-ended Headphone Outputs 4.4mm balanced 3.5mm S-Balanced Balanced: 1,513mW RMS at 32Ω / 119mW at 600Ω S-Balanced: 567mW RMS at 32Ω / 30mW at 600Ω Analogue Outputs 4.4mm balanced 3.5mm single-ended Supported Formats PCM up to 768kHz DSD up to DSD512 Bluetooth Codecs aptX Lossless aptX Adaptive aptX LDAC LHDC/HWA AAC SBC Battery & Power 4,900mAh lithium-polymer battery Approximately 7 hours battery life USB-C power requirement: 5V/>1.8A Approximately 3.5-hour charging time