Amazon.com: Customer reviews: Sony PHA1A Portable Hi-Res DAC/Headphone Amplifier, Silver
Amazon.com: Headphone Amplifier Case for Sony PHA1A,Topping NX4 DSD and Creative Sound Blaster E5 High-Resolution USB DAC 600 ohm Headphone Amplifier by WGear, Fastening Elastic Strap, Featured Wrist Strap : Electronics
File:Sony PHA-1A.jpg - Wikimedia Commons
Sony Portable Hi-Res DAC/Headphone Amplifier up to PCM 192kHz/24 bit - PHA-1A | eBay