I've never listened to these but a 192/24 USB powered mobile DAC for $70 TODAY ONLY (regular $300) with free shipping. Again, I've never laid hands on this product, much less listened to it and reviews are scarce - so I'm not endorsing it, but it's a heck of a sale and maybe I'll grab one just for grins. http://www.bhphotovideo.com/c/product/1080998-REG/roland_ua_m10_professional_mobile_interface.html Roland Site: LINK High-quality PCM and DSD playback with support for a variety of formats Roland's proprietary S1LKi DSP technology makes everything sound its best Powerful headphone amp provides plenty of volume in noisy environments Supports up to four outputs; configurable as two stereo channels for main and monitor VS Streaming technology for extremely stable low-latency performance About the size of a deck of cards, it goes anywhere Signal Processing PCM format PC interface: 32 bits DA Conversion *1: 1 bit, 32 bits PCM format PC interface: 352.8 kHz *2, 192 kHz, 176.4 kHz, 96 kHz, 88.2 kHz, 48 kHz, 44.1 kHz DA Conversion *3: 3.072 MHz, 2.8224 MHz, 192 kHz, 176.4 kHz *2 If the sampling rate is 352.8 kHz, the number of channels is limited to two channels, and playback is possible only via ASIO/Core Audio. *3 When "S1LKi Mode" is valid, DA conversion operates on 3.072 MHz or 2.8224 MHz. DSD format: PC interface: 5.6448 MHz *4, 2.8224 MHz DA Conversion: 2.8224 MHz