iFi iDSD GR 2 Review: High-Power Portable Audio Flexibility

The iFi iDSD GR 2 centers its architecture around the Burr Brown PCM1795 DAC, a chip designed to handle high-resolution audio files with precise channel separation. Weighing 0.5 kg (about 1.1 lb), the unit remains portable enough for desktop use or travel while packing a substantial 4,900mAh battery. Users can manage settings through an integrated OLED touch display or the iFi Nexis app, which adds a layer of digital control uncommon in many analog-heavy portable amplifiers. The inclusion of SPDIF and analog inputs provides versatility for users connecting diverse hardware, from specialized high-end streamers to standard smartphones.

Driving power is a primary focus here, with the device delivering a peak output of 2,173mW. This high current capacity allows the amplifier to power demanding over-ear headphones that often struggle with weaker, battery-powered portable amps, while also maintaining enough control for sensitive in-ear monitors. The device supports aptX Lossless Bluetooth, which aims to minimize the detail loss usually associated with wireless streaming protocols. Users can further manipulate the sound signature using integrated features like XBass+ and XSpace, which are analog enhancements designed to adjust low-frequency response and soundstage perception without relying solely on digital processing.

While the 2,173mW output is impressive for the category, buyers should be aware that the 7-hour battery life is relatively modest compared to some portable DACs that prioritize longevity over raw power. The heavy reliance on features like K2/K2HD processing and app-based control means users may need to invest time in initial setup and configuration to get the desired sound profile. The 0.5 kg (1.1 lb) weight also puts it on the heavier side for those expecting a pocket-sized device for daily commuting. Prospective buyers should verify if their primary headphones are high-impedance models that actually require such high output, or if a smaller, more efficient battery-friendly option would better serve their needs.

Buy it if you require a high-power solution that can drive demanding headphones while offering sophisticated sound-shaping tools like XSpace and XBass+. It suits enthusiasts who value granular control over their audio signal via app integration and a dedicated OLED screen. Skip it if you prioritize battery longevity over peak output power, as the 7-hour playback limit may necessitate frequent charging during long listening sessions. Also avoid it if your daily use case demands a lightweight, truly pocket-friendly device, as the 0.5 kg footprint is more suited for transport in a bag than a jacket pocket.