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Oppo HA-2SE Headphone Amplifier / USB DAC


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OPPO HA-2SE portable headphone Amplifier and DAC is an improved version of the original HA-2 with several significant upgrades including the reference ESS Sabre32 DAC.

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Product Video


Warranty length 1 Year
Brand Oppo
Product Award HiFi Choice Recommended, What HiFi Award 5 Stars, HiFi Choice 5 Star

Tech Specs

DAC: ESS Sabre32 Ref ES9028-Q2M
Format: Stereo PCM, DSD (v1.1/native)
PCM Sampling: 44.1-384kHz, 16/24/32bit
DSD: 2.8, 5.6, 11.3MHz (DSD64/128/256)
Profile: USB 2.0, USB Audio 2.0


Frequency Response: 20Hz - 200kHz
Headphone Impedance: 16Ω - 300Ω
Max Impedance: (16/300Ω) 300/30mW
Headphone Amp Impedance: 0.5Ω


Audio-in Level: 1 Vrms
Line-out Level: 1 Vrms
Output: 3.5 mm stereo headphone/line
Analog Input: 3.5 mm stereo audio
Digital: USB A for iPod /iPhone /iPad
USB Micro-B: Smartphones with USB OTG


Type: 3000mAh lithium polymer rechargeable
Analog Operation: 13 hours via Audio in
Digital Operation: 7 hrs via USB input
Charging Time: Approx 1 hour 30 minutes


Power Supply Unit (Rapid Charger)
USB A-micro B/ rapid charging cable
USB A-Lightning cable (Apple devices)
USB microB-microB: (Android/smartphones)
Audio Cable: 3.5mm - 3.5mm stereo
Silicone rubber band: 2 pieces
User guide and warranty documents


Dimensions (WHD): 68 x 137 x 12mm
Weight: 175 grams

Product Description

Oppo HA-2SE is a high-res portable headphone amplifier and USB DAC for Apple, Android, PC and Mac. It is an updated version of the award winning HA2 which garnered high critical acclaim.

What's New?

Due to the huge success of the award winning HA2, Oppo decided to make only minimal changes to the HA-2SE in order to update the headphone amp and address some previous concerns while maintaining the same great design, sound quality and engineering.

The amplifier has been updated with the latest ESS Sabre32 Reference ES9028-Q2M instead of the ES9019-K3M DAC chip used in the original HA2. The noise floor has been further lowered and the signal to noise ratio intensified for added reduction of any hissing/white noise and to optimise the amp for use with sensitive in-ear monitors.

High-Res & Stylish

HA-2SE 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. It has a genuine leather casing with contrast stitching and bevelled aluminium edges are eye-catching.

Featuring hybrid class AB amplification and a USB DAC that supports 384 kHz PCM and DSD256, the HA-2SE offers high performance digital-to-analogue conversion for Apple’s iPhone/iPod products, a wide range of Android devices, PC and Mac computers.

ESS Sabre32 ES9028-Q2M

With the ESS patented 32-bit Hyperstream DAC architecture and Time Domain Jitter Eliminator, the SABRE32 Reference ES9028-Q2M DAC delivers an unprecedented performance for mobile applications.

HA-2SE turns a smartphone into a high performance digital audio player. The asynchronous USB DAC input also works with PC and Mac computers to replace the built-in sound card and support high-resolution audio playback with PCM up to 384 kHz 32-bit and DSD up to 12 MHz (DSD256).

Music on the Go

Headphones, from very sensitive In-Ear Monitors to the most power-hungry Over-the-Ears, can all benefit from the HA-2SE’s excellent performance and powerful amplification. The HA-2SE's power amplification circuit for the headphones is Class AB built with integrated circuits (ICs) and discrete transistors. The output transistors are biased to operate in their most linear range for the critical small signal, and deliver their full potential when power is required.

Clean Signal Path

The HA-2SE provides a clean signal path for the audio by avoiding re-digitizing the audio signal for volume adjustment or bass boost. The HA-2SE features patented VOOC rapid charging technology from OPPO. Using the supplied rapid charger the internal battery can be quickly and safely charged to 70% capacity in about 30 minutes.

Build Quality

The HA-2SE is housed in an aluminium chassis wrapped in genuine leather. The bevelled metal edges and contrast stitching on the leather are eye-catching. The HA-2SE meshes equally well in the pocket of an urban Millennial or on the desk of a business executive.

The HA-2SE is both compatible with the latest iPod, iPhone, iPad and android devices that support USB OTG (USB On-The-Go) and USB Audio Class. Music from your favourite portable device will sound its best.

Two Gain Settings

The HA-2SE offers two gain level settings for optimal headphone matching, the High Gain mode for driving large power-hungry headphones and the Low Gain mode for sensitive In-Ear Monitor type earphones. The HA-2SE offers a Bass Boost function for those who like a bit more punch and impact with their music.

Mobile Power Bank

The HA-2SE functions as an external battery pack to charge your mobile device. You can ditch the bulky spare battery pack and carry just the HA-2SE with you mobile phone. The HA-2SE has a 3.5 mm Audio-in port to support portable music players that do not have a USB-compatible digital output. While the HA-2SE is used with one of its USB digital input ports, the 3.5 mm jack acts as Line-Out for the USB DAC.

Press Reviews

  • 'Oppo makes minor advancements to its 2015 Award-winning DAC, which remains as pertinent as ever in a burgeoning market. For wide compatibility, clear, agile and detailed sound, more open treble, tighter bass, practical design.' (What Hi-Fi Magazine October 2016)

  • 'This may not sound particularly revolutionary, but it shines through in the performance. Thankfully, the original’s dynamic, articulate and detailed sound still provides the solid foundations of the HA-2 SE’s presentation.' (What Hi-Fi Magazine October 2016)

  • 'They’re direct too, gushing over the top of the instrumentals with stark clarity and focus. The jazz arrangement is rhythmically sound, the Oppo breezing through the track with energy and crisp timing, revealing its progressive giddiness. With the lower frequencies, this DAC balances depth with suppleness well... The more versatile Oppo has more features though, making it one of the budget DAC market’s most important offerings.' (What Hi-Fi Magazine October 2016)

  • 'it is good to note that sonically, the new model makes some useful gains over the old one. With an original HA-2 running in parallel connected to a Lenovo ThinkPad, the single biggest change is the drop in the noise floor.' (Hi-Fi Choice Magazine February 2017)

  • 'What (HA-2SE) does ensure is that an already excellent product has improved even more in expectation of the portable headphone and DAC market becoming a lot more significant in the year ahead... the HA-2 SE is a very desirable add-on device at a highly tempting price.' (Hi-Fi Choice Magazine February 2017)

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