Portable USB headphone amps

Specs as supplied by the manufacturer.

Onkyo DAC-HA300 £499


Headphone amp, DAC and standalone player


  • analog
  • coax
  • optical
  • USB (standard Lightning cable for iOS devices, On-the-Go cable for Android)

32-bit/192kHz TI Burr-Brown PCM1795 DAC

128 GB of music stored on microSD


  • Supports 192 kHz/24-bit Hi-Res Audio and 5.6 MHz DSD Playback via iOS Devices (Lightning USB Cable and HF Player App Required*1), Android Devices (On-the-Go Cable and HF Player App Required*2), and PC/Mac*3 (via Micro USB Type-B Input)
  • Compatible with Most Major Hi-Res, Lossless, and Compressed Audio Formats Including WAV, MP3, AAC, WMA, FLAC, DSF, DFF (DSDIFF)*4
  • Supports 192 kHz/24-bit Hi-Res Audio from Connected Media Players via Digital Optical/Coaxial Switching Input
  • Inbuilt Hi-Res Music Player with Up to 128 GB microSD Card Storage*5
  • Bright OLED Screen for Song Selection
  • Sort by Artist, Album, Genre, or Playlist
  • Favorites Function for Mobile Listening
  • Premium TI Burr-Brown 192 kHz/32-bit PCM1795 DAC Enables Asynchronous D/A Conversion for PC, Mac, and Android with High-Precision Clock and Jitter-Reduction Technology
  • MUSES8920 Op-Amp and Fully Discrete Low-Distortion Push-Pull Output Circuitry for Brilliantly Clear and Immersive Hi-Fi Sound Quality
  • High Output Power with Selectable Two-Stage Gain to Drive 8–600 Ohm Headphones
  • Recharging via Micro USB Type-B Connection and PC
  • Up to Approx. 7 Hours Battery Life When Digitally Connected to iOS Devices or with Playback via microSD Card
  • Free HF Player App Includes 16,384-band Touch-Adjustable FIR Equalizer; Create and Save Your Own EQ Presets or Select from a Range Created by Famous Musicians
  • ErP2-Compliant Auto Power-Saving Feature
  • Easily Adjustable Volume Control Knob with Bump Protectors
  • Compact, Durable, and Stylish Aluminum Body
  • Includes Micro USB Type-B Input and Cable for Mac/PC Connection, DC Input to USB-A Charging Cable, RCA to Mini-Plug Cable for Coaxial Digital Connection, and Rubber Bands for Attachment to Portable Media Players

*1 Certified for iPhone 5s, iPhone 5c, iPhone 5, iPad Retina (4th Generation), iPad Air,
iPad mini, iPad mini Retina, and iPod touch (5th Generation or later). Full HF Player
app functionality for Hi-Res Audio is available when iOS device is connected via USB cable.

*2 Requires Android 4.1 or later. Full HF Player app functionality is available when Android device is connected via USB cable.

*3 Connection to computer via USB is supported by Windows Vista, Windows 7, Windows 8, Windows 8.1, OS X Lion, OS X Mountain Lion 10.8, and OS X Mavericks 10.9. Functionality with other operating systems is not guaranteed.

*4 Compatible formats: WAV (44.1/48/88.2/96/176.4/192 kHz, 16-bit/24-bit), MP3 (32/64/96/128/192/256/320 kbps), AAC (64–320 kbps), WMA (48–384 kbps), FLAC (44.1/48/88.2/96 kHz, 16-bit/24-bit), DSF/DFF (2.8224 MHz [DSD]/5.6448 MHz [Double Rate DSD])

*5 A microSD card is not included.

Added 2015