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OPPO HA-1 Headphone Amplifier

New product

  • Headphone Amplifier | DAC | Pre-amplifier.
  • Fully balanced design.
  • ES9018 32-Bit Sabre DAC.
  • Class A power amplifier section.

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This product has been discontinued.

The OPPO HA-1 Headphone Amplifier is a versatile digital audio hub for your music. Aside from being a high performance headphone amp sporting a Class A power amplifier section, it is also a competent stand alone D-A converter or dedicated pre-amplifier. A high-end Sabre ES9018 32-Bit DAC chip handles the digital to analogue conversion with all analogue stages being a true, fully balanced configuration.

We only ship this product within the United Kingdom or countries outside of the United Kingdom where there is no appointed OPPO distributor.

Manufacturers Information

The OPPO HA-1 Headphone Amplifier builds upon the success of our BDP-95 and BDP-105 audiophile universal Blu-ray Disc players.

The BDP-95 and 105 have been selected as "Recommended Components" by prestigious publications such as Stereophile and The Absolute Sound. Discerning listeners describe the players’ DAC and analogue output stage as very detailed, transparent and engaging. Bench tests indicate the players’ performance approaching the measurable limit of audio analysing instruments. Drawing upon the proven circuit design of these award-winning players, the HA-1 combines an uncompromising Class A balanced power amplifier section with the performance of the ESS 9018 Sabre32 Reference DAC.

OPPO designs the HA-1 headphone amplifier with the same universal approach as our Blu-ray players. The HA-1 is a high performance headphone amplifier, and it doubles as an asynchronous USB DAC, a stereo pre-amplifier, a digital audio dock for mobile devices, and a Bluetooth audio transport. Its fully balanced design and numerous inputs ensure the best in fidelity and versatility.

The analog audio section of the HA-1 is a fully balanced design with an emphasis on keeping the audio signal in the analog domain once it leaves the DAC. The HA-1 is anchored by a beefy toroidal power transformer. Linear power regulators and filters with custom made capacitors ensure that the headphone amplifier has a clean power source with plenty of reserve energy. The power amplification section uses hand-picked and paired discrete components to ensure symmetry. A motor-driven precision volume control knob enables both hand adjustment and remote control while keeping the audio in a pure analog audio path. Users have a choice of using the 4-pin balanced XLR or the traditional quarter-inch headphone jack. Line level analog inputs and outputs are provided with both RCA and balanced XLR sockets. Built-in monitoring and protection circuitry guards against any mishaps such as short-circuiting, overloading, and DC offset that could lead to degraded performance.

The HA-1 is especially suitable for high-resolution digital audio. Its digital inputs include coaxial, optical, balanced AES/EBU, and an asynchronous USB DAC that supports both PCM and DSD formats. The same ESS 9018 Sabre32 Reference DAC and output driving stage used in our audiophile Blu-ray players ensures extremely low noise and low distortion performance. It is easy to connect the HA-1 to a computer via USB and enjoy jitter-free music using your favorite playback software. OPPO is also working with a leading smartphone and tablet manufacturer to certify the HA-1 so it can pass the required authentication and take digital audio from those popular mobile devices. For additional convenience, the Bluetooth audio transport with high quality Apt-X CODEC sets music in your mobile phones free with a performance boost.

Design

The HA-1 sports a classic design with contemporary elements. It is a desktop component housed in an aluminium chassis, and the familiar volume and source selection knobs are aided by a 4.3-inch screen for easy operation. Depending on your preference or even the mood of the music being played, you can choose between a classic VU meter, a modern spectrum display, or a simple informational summary on the screen. A supplied IR remote and a smartphone app via Bluetooth provide complete control and convenience.

With its exemplary sound quality, versatile connectivity, and energetic driving power, the HA-1 headphone amplifier is a good match to any high performance headphone or stereo sound system.


Specifications

General

Dimensions: (W x H x D) 10.0 x 3.1 x 13.1 inches, 254 x 80 x 333 mm

Mass:  13.0 lbs, 5.9 kg

Power Supply: AC 110-120 V~ / 220-240 V~, 50/60 Hz auto-sensing

Power Consumption: 70 W (operation), 0.5 W (standby)

Trigger Input: 3.5 V – 15 V, 10 mA minimum

Trigger Output: 12 V, 100 mA maximum

Operating Temperature: 41 °F - 95 °F, 5 °C - 35 °C

Operating Humidity: 15% - 75% No condensation

Recommended Headphone Impedance: 32 ohm – 600 ohm

Balanced Headphone Jack Output (XLR-4) Pin order 1: L+, 2: L-, 3: R+, 4: R-, Shell: GND

6.35 mm Headphone Jack Output Pin order: Tip: L, Ring: R, Sleeve: GND


XLR Balanced Audio Input

Input Impedance: 15k ohm

Maximum Input Level: 18 Vrms, +27.3 dBu (0 dBu = 0.775 Vrms)


RCA Stereo Audio Input

Input Impedance: 10k ohm

Maximum Input Level: 9 Vrms, +21.3 dBu (0 dBu = 0.775 Vrms)


Coaxial, Optical, AES/EBU Digital Inputs

Input Format: Stereo PCM

Sampling Frequencies: 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, 192 kHz

Word Length: 16-bit, 24-bit


USB DAC Audio Input (USB B Type)

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

PCM Sampling Frequencies: 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, 192 kHz, 352.8 kHz, 384 kHz

PCM Word Length: 16-bit, 24-bit, 32-bit

DSD Sampling Frequencies: 2.8224 MHz (DSD64), 5.6448 MHz (DSD128), 11.2896 MHz (DSD256, native mode only)

Profile: USB 2.0, USB Audio 2.0


Mobile USB Audio Input (USB A Type)

Input Format: Stereo PCM

PCM Sampling Frequencies: 44.1 kHz, 48 kHz

Profile: USB 2.0, USB Audio 2.0

VBUS Power Output: +5 V, 2.1 A


Bluetooth Audio Input

Standard: Bluetooth 2.1+EDR

Profile: iAP, SPP, AVRCP, A2DP

Audio Transmission Format: SBC, aptX

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