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Desktop/Portable Headphone Amplifier
Oppo Portable Headphone Amplifier *HA-2*

Headphone Amplifier and DAC
High-resolution USB DAC for Apple/Android/PC/Mac
ESS Sabre32 Reference ES9018-K2M DAC chip
Mobile power bank for charging your phone

Portable Headphone Amplifier with a 1 year agent warranty, made in China !!!!


  • Hi-Fi Choice Recommended April`2014 *****

  • The HA-2 possesses an Apple-esque tactility, solidity and clarity of design"


  • "... the OPPO HA-2 is the smart choice for those seeking a polished-sounding and gutsy performer that’s keenly priced."

  • Hi-Fi News Editor's Choice May'2015 *****

  • ... Oppo’s new rechargeable portable DAC/headphone amp is perfect for music on the move"

  • What Hi-Fi Sept'2015 *****

  • "It’s a combination of dynamics, timing and detail regardless of the genre to which you’re listening that makes the Oppo so adept."

    The HA-2 is an elegant yet sophisticated portable headphone amplifier with built-in rechargeable battery. It is engineered to enhance music playback from mobile phones and portable music players. Aesthetically, the HA-2 does not look like a typical or generic electronic device. Its genuine leather casing with contrast stitching and beveled aluminum edges are eye-catching and cannot be confused with any other product. Its fit and finish will instill a sense of pride when using the product.

    Featuring hybrid class AB amplification and a USB DAC that supports 384 kHz PCM and DSD256, the HA-2 offers high performance digital-to-analog conversion for Apple’s iPhone/iPod products, a wide range of Android devices, PC and Mac computers. The HA-2 may be conveniently used to charge mobile devices on-the-go and itself can be efficiently charged in 30 minutes. Headphones, from very sensitive In-Ear Monitors to the most power-hungry Over-the-Ears, can all benefit from the HA-2’s excellent performance and powerful amplification.

    With smartphone use increasing all the time, users are often carrying a device that is capable of storing high quality audio files. The HA-2 is a very mobile-centric portable headphone amplifier and DAC that pairs exceptionally well with iOS and Android devices, and it can offer a significant improvement in sound quality over the amplification and DAC available in the mobile device itself, without adding excessive bulk and weight so as to make the combination inconvenient. Other mobile-friendly features such as rapid charging and mobile device power bank make the HA-2 a true companion for music on the go.

    The HA-2 offers two USB DAC input ports - one for Apple’s iPhone/iPod, and the other for Android devices, PC and Mac computers. A 3.5 mm input works with the remaining portable music players that do not have a USB-compatible digital output.

    There are two gain level settings. The High Gain mode is capable of driving large power-hungry headphones, delivering up to 300 mW into 16-Ohm headphones. The Low Gain mode is intended for sensitive In-Ear Monitor type earphones. In addition to the two gain levels, the HA-2 offers two stages of volume control to precisely dial the desired output volume and to resolve the volume disparity issues between using In-Ear Monitors and full-size headphones. By mapping USB volume control commands to the Sabre DAC chip's internal digital volume control, users can adjust the signal volume using the playback app or software without losing audio resolution or causing bit truncation. The HA-2's analog volume control knob can then be used to further adjust for a comfortable listening level. For users who like a bit more punch and impact with their music, the HA-2 offers a Bass Boost function that is implemented purely with analog audio circuits.

  • Dimensions (W x H x D) - 68 x 137 x 12 mm
  • Mass - 175 grams
  • Frequency Response - 20 Hz - 200 kHz
  • Audio-in Level - 1 Vrms
  • Recommended Headphone Impedance - 16 Ohm - 300 Ohm
  • Maximum Headphone Output Power - 300 mW into 16 Ohm
  • Maximum Headphone Output Power - 220 mW into 32 Ohm
  • Maximum Headphone Output Power - 30 mW into 300 Ohm
  • Headphone Amplifier Output Impedance - 0.5 Ohm
  • Output Jacks - 3.5 mm stereo headphone, 3.5 mm stereo line-out
  • Input Ports - Analog: 3.5 mm stereo audio-in
  • Input Ports - Digital: USB A for iPod / iPhone / iPad
  • Input Ports - USB micro-B for smartphones with USB OTG and computers
  • DAC Chip - ESS Sabre32 Reference ES9018-K2M
  • Input Format - Stereo PCM, Stereo DSD
  • PCM Sampling Frequencies - 44.1 kHz-384 kHz, 16/24/32-bit
  • USB DAC Audio Input PCM Word Length - 16-bit, 24-bit, 32-bit
  • DSD Sampling Frequencies - 2.8224 MHz, 5.6448 MHz,11.2896 MHz
  • Profile - USB 2.0, USB Audio 2.0
  • Built-in Battery type - 3000 mAh lithium polymer rechargeable
  • Battery Operation Time - 13 hours for analog source via Audio-in
  • Battery Operation Time - approx. 7 hours for digital sources via USB
  • Oppo Portable Headphone Amplifier *HA-2*
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