Oppo HA-2 User Manual

HA-2

Portable Headphone Amplifier / USB DAC

USER GUIDE

1. Important Information

The exclamation point within an equilateral triangle is
intended to alert the user to the presence of important
operation and maintenance (servicing)instruction in the
literature accompanying the appliance.

WARNING:TO REDUCE THE RISK OF FIRE OR

ELECTRICSHOCK, DO NOT EXPOSE THIS APPLIANCE
TO RAINOR MOISTURE. DO NOT OPENTHE CABINET.
REFER SERVICING TO QUALIFIEDPERSONNEL
ONLY.THE APPARATUS SHALL NOT BE EXPOSED
TODRIPPING OR SPLASHING AND THAT NO
OBJECTSFILLED WITH LIQUIDS, SUCH AS VASES SHALL
BEPLACED ON THE APPARATUS.

1. Read these instructions.

2. Keep these instructions.

3. Heed all warnings.

4. Follow all instructions.

5. Do not use this device near water.

6. Clean only with a dry cloth.

7. Do not install near any heat sources such as radiators, heat
registers, stoves, or other apparatuses (including amplifiers)
that produce heat.

8. Only use attachments and accessories specified by the
manufacturer.

9. Refer all servicing to qualified service personnel. Servicing
is required when the apparatus has been damaged in any
way, such as when the power supply cord or plug is
damaged, liquid has been spilled or objects have fallen into
the apparatus, the apparatus has been exposed to rain or
moisture, does not operate normally, or has been dropped.

WARNING: To prevent possible hearing damage, do not listen at
high volume levels for long periods. Caution should be taken when
using earphones or headphones with the product because
excessive sound pressure (volume) from earphones or
headphones can cause hearing loss.

Legal Notice

“Made for iPod”, “Made for iPhone”, and “Made for iPad”
mean that an electronic accessory has been designed to
connect specifically to iPod®, iPhone®, or iPad®,
respectively, and has been certified by the developer to meet
Apple performance standards. Apple is not responsible for the
operation of this device or its compliance with safety and
regulatory standards. Please note that the use of this
accessory with iPod, iPhone, or iPad may affect wireless
performance.

iPad, iPhone, iPod and iPod touch® are trademarks of Apple
Inc., registered in the U.S. and other countries.

Compatible iPod/iPhone/iPad

Models

USB works with iPhone 6, iPhone 6 Plus, iPhone 5S, iPhone
5C, iPhone 5, iPhone 4S, iPad (4th generation), iPad mini,
iPod touch (5th generation).

Android™ Compatibility

USB works with Android devices that support USB OTG (USB
On-The-Go) and USB Audio Class. Not all devices are
compatible.

Android is a trademark of Google Inc.

2. Introduction

Thank you for choosing the OPPO HA-2 portable headphone
amplifier and USB DAC. The HA-2draws upon the success of the
HA-1 desktop headphone amplifier, and is optimized for portable
use. Featuring a hybrid class AB amplifier and a USB DAC
supporting 384 kHz PCM and DSD256, the HA-2 offers high
performance digital-to-analog conversion for both Apple’s
iPhone/iPod and many Android devices. A 3.5 mm input works
with the remaining portable music players that do not have a
USB-compatible digital output. Convenience features such as
VOOC rapid charging and a mobile device power bank make the
HA-2 a true companion for music on the go.

Accessories

Ensure that the following accessories have been included with
your OPPO HA-2:

1x USB A – Lightning data cable

1x USB micro-B –USB micro-B data cable

1x 3.5 mm – 3.5 mm stereo audio cable

1x USB A –USB micro-B data and rapid charging cable

1x VOOC rapid charger

2x Silicone rubber bands

This user guide

Features

Digital-to-Analogue conversion by ESS Sabre32 Reference

ES9018-2M DAC chip

Supports PCM audio up to 384 kHz / 32-bit, DSD audio up to 12

MHz (DSD256 or DSD4x)

Supports multiple device types for digital-to-analogue conversion

via USB: iPod / iPhone / iPad, smartphones with USB OTG
feature, PC and Mac computers

Stereo headphone output and line-out

Two gain settings for optimal headphone matching

Bass boost

OPPO VOOC rapid charging

Mobile power bank for charging other mobile devices

Names and Functions of Parts

Top:

1. Power/Volume Knob: Turn this knob clockwise to turn
on the unit and increase the volume. Turn it
counterclockwise to decrease the volume. Turn it
counterclockwise until it clicks to turn off the unit.

2. Power Indicator: A green light indicates that the power
is on. The light also serves as a reference point for the
scale on the Volume Knob.

3. Audio-in / Line-Out Jack: When the Source Selector is
set to “C”, this jack can be connected to an analog
audio source, such as a portable music player. When
the Source Selector is set to “A” or “B”, this jack acts
as the line-out for the USB DAC.

3. Headphone Jack: Plug your headphones into this jack.

CAUTION: Always reduce the volume before plugging

headphones in and putting them on. While wearing
headphones, do not connect or disconnect them.
Doing so could result in a sudden loud noise that could
harm your hearing.

Bottom:

4. Source Selector: Select one of the three input sources:
USB A port, USB micro-B port, or Audio-in.

5. USB A Port: For connecting to an iPod, iPhone or
iPad; or for charging a mobile device when using the
power bank function.

6. USB micro-B Port: For connecting to a PC, Mac, or
smartphone with USB OTG feature. This port is also
used for charging the HA-2’s internal battery.

Side:

7. Power Bank Indicator: A blue light indicates that the
HA-2 is supplying power to a connected device via the
USB A port.

8. Battery Level / Charging Indicators: Four green lights
indicate the HA-2’s internal battery level. When
charging, these lights also indicate the charging status
and currently charged capacity.

9. Battery Check / Power Bank Button: A single press of
this button lights up the Battery Level Indicators to
show the HA-2’s internal battery level. Press and hold
this button to turn on/off the power bank function, as
indicated by the Power Bank Indicator.

10. Bass Boost Switch: Allows you to enable the Bass
Boost feature. A visible green bar means Bass Boost is
enabled.

11. Gain Switch:Allows you to select low (L) or high (H)
gain for the headphone output.

12. Charging and Battery Use

This unit has a built-in rechargeable lithium polymer battery. It
should be charged before use.

VOOC Rapid Charging

Connect the USB micro-B port of the HA-2 to the supplied
VOOC Rapid Charger using the included USB A – USB
micro-B data and rapid charging cable. Plugging the charger
into a power outlet will begin charging the HA-2’s battery, and
the Charging Indicators on the side of the unit will start to
blink. It may take a few seconds to enter the rapid charging
mode, which is indicated by the Charging Indicators quickly
blinking. When the battery is almost full, rapid charging will
change to normal charging automatically, and the blinking
speed of the Charging Indicators will slow down.

Normal Charging

The unit can also be charged by connecting the USB micro-B
port to a USB port on a Mac or PC. The Charging Indicators
on the side of the unit will blink when the unit is being
charged. Rapid charging is not possible using this connection
method.

Charging Status:

The Charging Indicators on the side of the unit may show the
following statuses:

< 25% 25%

-

50%

50%

-

75%

75%

-

100%

Fully

Charged





☼




☼





☼




☼










Legend:

 - dark
☼ - slowly flashing: normal charging; quickly flashing: rapid

charging

 - green light

CAUTION:

Use only the VOOC Rapid Charger and the USB A – USB

micro-B data and rapid charging cable to charge the
unit.

Make sure the environment temperature is between 10°C -

35°C (50°F - 95°F) when charging the unit. If trying to
charge outside of this temperature range, charging
may not occur properly.

If you do not plan to use the unit for a long period of time,

please store it in a cool place avoiding high
temperatures. Charge the unit at least once every 6
months in order to avoid completely draining the
battery.

Checking Battery Level

Press the Battery Check / Power Bank Button briefly to check
the battery level. The Battery Level Indicators will light up to
show the remaining battery power:

<20% 20%

-

25%

25%

-

50%

50%

-

75%

75%

-

100%





























Legend:

 - dark
 - red light

 - green light

When the battery level is below 20%, the Battery Level
Indicators will automatically light up in red as a reminder to
charge as soon as possible.

Charging Other Devices

The unit can be used as a power bank to charge other mobile
devices.

Connect the mobile device to the unit’s USB A port using the

charging cable that comes with your mobile device.

Press and hold the Battery Check / Power Bank Button until

the blue Power Bank Indicator lights up. The HA-2 is
now supplying power to the mobile device.

Press and hold the Battery Check / Power Bank Button again

until the blue Power Bank Indicator goes off when you
no longer need to supply power to the mobile device.

CAUTION:When the HA-2 is being charged, it cannot

supply power to an external device at the same time.

13. Source Device Connections

It is recommended that you turn the unit off before making the
connections.

iPod / iPhone / iPad

Set the Source Selector to position “A”.

Connect the USB A port of the unit to the iPod / iPhone / iPad

using the supplied USB A – Lightning data cable, or
the cable that comes with your iPod / iPhone / iPad.

Smartphones with USB OTG Feature

Set the Source Selector to position “B”.

Connect the USB micro-B port of the unit to the smartphone

using the supplied USB micro-B – USB micro-B data
cable.

Computers

Set the Source Selector to position “B”.

Connect the USB micro-B port of the unit to a USB port on

the computer.

For Mac, no driver is required. You may need to select the

HA-2 as the sound output device by going into System
Preferences / Sound in Mac OS X.

For PC, please download the HA-2 USB driver from the

OPPO Digital web site (www.oppodigital.co.uk) and
follow the instructions to install the driver.

Other Playback Devices

Set the Source Selector to position “C”.

Connect the Audio-in port of the unit to the playback device

using the supplied 3.5 mm – 3.5 mm stereo audio
cable, or any other audio cable with a 3.5 mm stereo
jack.

14. Listening to Music

To listen to music, you can connect a pair of headphones to
the headphone jack, or connect an amplifier or a pair of
powered speakers to the line-out jack.

Using Headphones

Plug the headphones into the Headphone Jack of the unit.

Connect the unit to your music source according to the

connections described above. Set the Source Selector
to the correct position.

Turn on the unit by rotating the Power/Volume Knob

clockwise.

Start music playback from the source device.

Put on the headphones and adjust the volume.

Turn on Bass Boostif desired

Using Line-out

Connect the line-out jack to the stereo audio input of your

amplifier or powered speakers.

Connect the unit to your music source according to the

connections described above. Set the Source Selector
to the correct position. Please note that the Line-out is
only active when sources A or B are selected.

Turn on your amplifier or powered speakers and set at

minimum volume.

Turn on the unit by rotating the Power/Volume Knob

clockwise.

Start music playback from the source device.

Gradually increase the volume on your amplifier or powered

speakers to a comfortable listening level.

CAUTION:

When both the Headphone Jack and the Line-out Jack are

plugged in, only the Headphone Jack will output

sound. Please do not plug in headphones if you need
to use the Line-out Jack.

The Line-out is at a fixed volume level. The Power/Volume

Knob of the unit does not affect the volume of the Line­out. Please use the volume control on your amplifier or
powered speakers.

Quick Reference Chart

Input, Output, and Source Selector for various sources:

Playback

Source

Source

Selector

Input

Port

Output

Jacks

iPod,

iPhone,

iPad

A

(left)

USB A

Headphone

or Line-out

Other

Smartphone

s

B

(center)

USB

micro-B

Headphone

or Line-out

Computers

B

(center)

USB

micro-B

Headphone

or Line-out

Other

Devices

C

(right)

Audio-in Headphone

Gain Selection

The HA-2 has two gain levels. The low gain (L) level is
intended for use with high sensitivity headphones and In-Ear
Monitors (IEMs). The high gain (H) level can be used for other
headphones if you feel that the volume is too low in low gain
level even when the Power/Volume Knob has been rotated to
the maximum volume position.

Please follow this procedure to safely change gain level:

Turn off the unit first.

Flip the Gain Switch to the high gain (H) position.

Turn on the unit and gradually adjust the volume.

Remember to reset the Gain Switch to low gain (L) position if

you switch to a new pair of headphones.

For certain IEMs, if at the low gain setting the volume is still

too loud, you can adjust the volume control on your
playback device. For Apple products connected to the
USB A port or playback software that supports USB
volume, the HA-2’s internal 32-bit digital volume
control will be usedso there will be no loss of resolution
or truncation of audio samples.

CAUTION:Changing the gain level on the fly may result in

a sudden increase of the output power, and may damage
your headphones and hearing.

Bass Boost

If you like to listen to music with a strong bass effect, you may
turn on the Bass Boost function of the unit. T o do so, flip the
Bass Boost switch so a green bar is shown.

15. Troubleshooting

Use this chart to resolve general operational problems. If there
are any problems that you cannot resolve, please contact your
OPPO service center.

Symptom: No sound

Possible Cause and Solution:

The unit is not turned on. Turn on the unit by rotating the Power /

Volume Knob

The battery is completely drained and the Power Indicator does

not come on. Charge the unit until the battery is full before
using.

The volume is too low. Adjust the volume of the source device,

and/or adjust the volume of the HA-2.

Incorrect connection to the source device. Please check the

connection by referring to the “Source Device
Connection” section of this guide.

Incorrect Source Selector position. Check which input source is

in use and set the Source Selector accordingly.

Line-out is muted when headphones are plugged in. Unplug the

headphones if you wish to use line-out.

Symptom: The unit fails to charge

Possible Cause and Solution:

Incorrect cable connection. Check the cable connection and re-

set all cables.

Incompatible charger or cable. Please use the supplied original

VOOC rapid charger and data / charging cable.

Reset required. Please press and hold the Battery Check /

Power Bank button for 20 seconds. Any lit indicator light
will go dark and then come back on again after a
successful reset.

Symptom: Temporary malfunction

Possible Cause and Solution:

The protection mechanism is triggered. Please turn off the unit,

remove all connections, and wait for 30 seconds before
trying again.

Interference from other devices. Identify interference by turning

off other devices, and then relocate or replace the
offending device.

16. Specifications

General

Dimensions
(W x H x D)

2.5 x 6.2 x 0.5
inches,
68x 157 x 12mm

Weight 6.2 oz, 175 grams

Frequency Response 20 Hz – 200 kHz

Audio-in Level 1 Vrms

Line-out Level 1Vrms @ 0 dBFS

Recommended Headphone
Impedance

16 Ohm – 300
Ohm

Maximum Headphone Output
Power

300 mW into 16
Ohm
220mW into 32
Ohm
30mW into 300
Ohm

Output Jacks

3.5 mm stereo
headphone

3.5 mm stereo
line-out

Input Ports

Analog: 3.5 mm
stereo audio-in
Digital: USB A for
iPod / iPhone /
iPad; USB micro­B for smartphones
with USB OTG
feature and
computers.

DAC Chip

ESS Sabre32
Reference
ES9018-2M

Input Format

Stereo PCM,
Stereo DSD (DoP
v1.1 or native)

PCM Sampling Frequencies

44.1 kHz - 384
kHz, 16 / 24 / 32­bit

DSD Sampling Frequencies 2.8224 MHz

(DSD64), 5.6448
MHz
(DSD128),11.289
6 MHz (DSD256,

native mode only)

Profile

USB 2.0, USB
Audio 2.0

Battery

Built-in Battery type

3000 mAh lithium
polymer
rechargeable
battery

Battery Operation Time

Approx. 13 hours
for analog source
via Audio-in;
approx. 7 hours
for digital sources
via USB

Charging Time

Approx. 1 hour 20
minutes

Designs and specifications are subject to change without
notice.

© 2014 All rights reserved.

OPPO Digital UK Ltd
42 Hellesdon Park Road,
Norwich, Norfolk, NR6 5DR.

www.oppodigital.co.uk
[e-mail]

[phone]

51980338V1.0

www.oppodigital.co.uk