Amazon.com: FiiO K11 R2R DAC and Headphone Amplifier for Home Audio or PC, 6.35mm and Balanced 4.4mm, RCA, Coaxial, Optical, 1300mW, 384kHz/24Bit
Amazon.com: FiiO K11 R2R DAC and Headphone Amplifier for Home Audio or PC, 6.35mm and Balanced 4.4mm, RCA, Coaxial, Optical, 1300mW, 384kHz/24Bit ,FiiO K11 Review — Headfonics,91KB,Fiio K11 - Recommended if You Listen to IEM's at a Desk - Honest Audiophile Impressions,FiiO K11 HiFi Balanced Decoder Headphone Amplifier USB DAC Hi-Res Audio 1400W | eBay