Archimago's Musings: REVIEW: iFi GO Bar - Portable DAC / Headphone Amp (Cirrus Logic DAC, Balanced & Unbalanced).
iFi audio - "iFi micro iDSD Black Label Portable DAC and Headphone Amplifier" A review by Audio46Headphones. "If you're an audiophile who loves new gear and you haven't heard of iFi portable
iFi GO blu Portable DAC/Amp – Apos Audio
iFi audio hip-dac Review - Headfonia Reviews
ZEN DAC V2 by iFi audio - Super-affordable DAC/amp from iFi audio
ZEN DAC by iFi audio - Super-affordable DAC/amp from iFi audio
iFi Hip-dac - Portable Balanced DAC/Headphone Amplifier for PC, Laptop, Android, iPhone with USB Input Only - Outputs: 3.5mm Unbalanced / 4.4mm Balanced : Amazon.com.au: Electronics