Oppo HA-2 SE, A portable Headphone Amplifier and USB DAC
High-Resolution Audio Meets Style and Design
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.
Its genuine leather casing with contrast stitching and bevelled aluminium edges are eye-catching. And it is conveniently used to charge mobile devices on-the-go and itself can be efficiently charged in 30 minutes.
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. 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.
Hybrid Class AB Amplifier
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.
ESS Sabre32 Reference DAC
With the ESS patented 32-bit Hyperstream™ DAC architecture and Time Domain Jitter Eliminator, the Sabre32Reference DAC delivers an unprecedented performance for mobile applications.
Asynchronous USB DAC
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).
Clean Signal Path
The HA-2SE provides a clean signal path for the audio by avoiding re-digitising 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.
|Dimensions (W x H x D)
||2.7 x 5.375 x 0.5 inches, 68 x 137 x 12 mm
||6.2 oz, 175 grams
||20 Hz - 200 kHz
|Recommended Headphone Impedance
||16 Ohm - 300 Ohm
|Maximum Headphone Output Power
||300 mW into 16 Ohm
220 mW into 32 Ohm
30 mW into 300 Ohm
|Headphone Amplifier Output Impedance
||3.5 mm stereo headphone
3.5 mm stereo line-out
||Analogue: 3.5 mm stereo audio-in
Digital: USB A for iPod / iPhone / iPad; USB micro-B
for smartphones with USB OTG feature and computers.
||ESS Sabre32 Reference ES9028-Q2M
||Stereo PCM, Stereo DSD (DoP v1.1 or native)
|PCM Sampling Frequencies
||44.1 kHz - 384 kHz, 16 / 24 / 32-bit
|DSD Sampling Frequencies
||2.8224 MHz (DSD64), 5.6448 MHz (DSD128),
11.2896 MHz (DSD256, native mode only)
||USB 2.0, USB Audio 2.0
||Power Supply Unit (Rapid Charging Charger) USB A - USB micro-B data and rapid charging cable USB A - Lightning data cable (for Apple devices) USB micro-B to micro-B data cable (for Android and other smartphones) 3.5 mm - 3.5 mm stereo audio cable Silicone rubber band (2 pieces) User guide and warranty documents
|Built-in Battery type
||3000 mAh lithium polymer rechargeable battery
|Battery Operation Time
||Approx. 13 hours for analogue source via Audio-in;
approx. 7 hours for digital sources via USB
||Approx. 1 hour 30 minutes