Headphone Amplifiers

OPPO HA-1 Headphone Amplifier Review


Conclusions about the OPPO HA-1 Headphone Amplifier

OPPO continues to amaze everyone with their products. The BDP-105 Blu-ray Universal Player is a legend. Now the PM-1 headphones are startling us all, and the HA-1 . . . well, all I can say is if OPPO were a publicly traded stock, I would be sad that I couldn't buy any, since I review their products.

The HA-1 is a killer. I got one is silver and it's gorgeous to look at and dazzling to listen to. Should I say, "Highly recommended," or have you already assumed so?


  • • Pure Class A operation in the output stage.
  • • No global negative feedback.
  • • USB jack for connecting iPod.
  • • Fully balanced for use with balanced headphones.
  • • Plays digital music files up to 24/384 PCM and DSD256.

Would Like

  • • iPad app to select music for playing (the existing app duplicates the remote control to set volume, input, etc.)
  • • USB port to connect a USB drive for music storage, accessible with iPad app.