HA-1 Headphone Amplifier
£1,199.00
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.
Specification:
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
DAC Performance Specifications
XLR Output RCA Output
Output Level: 4.6 ± 0.3 Vrms Output Level: 2.3 ± 0.3 Vrms
Frequency Response: Frequency Response:
10 Hz – 170 kHz (+0/-3 dB) 10 Hz – 170 kHz (+0/-3 dB)
20 Hz – 20 kHz (+0/-0.07 dB) 20 Hz – 20 kHz (+0/-0.07 dB)
THD+N at 1 kHz (A Weight, 20 Hz – 20 kHz): THD+N at 1 kHz (A Weight, 20 Hz – 20 kHz):
< 0.00056% (< -105 dB) < 0.00056% (< -105 dB)
Channel Separation: Channel Separation:
> 105 dB > 105 dB
Signal-to-Noise Ratio (A Weight, 20 Hz – 20 kHz): Signal-to-Noise Ratio (A Weight, 20 Hz – 20 kHz):
> 115 dB > 113 dB
Dynamic Range (1 kHz -60 dBFS, Dynamic Range (1 kHz -60 dBFS,
A Weight, 20 Hz – 20 kHz): A Weight, 20 Hz – 20 kHz):
> 115 dB > 113 dB
(Test condition: USB DAC input in Home Theatre Bypass mode and the volume knob at Max position.)
Pre-amplifier Performance Specifications
XLR Input – XLR Output RCA Input – RCA Output
Rated Output Level: 4.6 Vrms Rated Output Level: 2.3 Vrms
Frequency Response: Frequency Response:
10 Hz – 200 kHz (+0/-2 dB) 10 Hz – 200 kHz (+0/-2 dB)
20 Hz – 20 kHz (+0/-0.04 dB) 20 Hz – 20 kHz (+0/-0.04 dB)
THD+N at 1Khz (A Weight, 20 Hz – 20 kHz): THD+N at 1Khz (A Weight, 20 Hz – 20 kHz):
< 0.00056% (< -105 dB) < 0.00071% (< -103 dB)
Channel Separation: Channel Separation:
> 120 dB > 110 dB
Signal-to-Noise Ratio Signal-to-Noise Ratio
(A Weight, 20 Hz – 20 kHz): (A Weight, 20 Hz – 20 kHz):
> 110 dB > 105 dB
Dynamic Range Dynamic Range
(1 kHz -60 dB, A Weight, 20 Hz – 20 kHz): (1 kHz -60 dB, A Weight, 20 Hz – 20 kHz):
> 120 dB > 115 dB
Maximum Gain (100 mVrms input): Maximum Gain (100 mVrms input):
6 dB 6 dB
(Test condition: Volume knob at Max position and an input signal to drive the output to the rated output level.)
Headphone Power Amplifier Specifications
XLR Input – Balanced Output RCA Input – 6.35mm Output
Maximum Output Power (Per Channel) Maximum Output Power (Per Channel)
into 600 Ohm: into 600 Ohm:
2400 mW 600 mW
Maximum Output Power (Per Channel) Maximum Output Power (Per Channel)
into 32 Ohm: into 32 Ohm:
3000 mW 3500 mW
Rated Output Power (Per Channel) Rated Output Power (Per Channel)
into 600 Ohm: into 600 Ohm:
800 mW 200 mW
Rated Output Power (Per Channel) Rated Output Power (Per Channel)
into 32 Ohm: into 32 Ohm:
2000 mW 500 mW
Frequency Response at Rated Power Frequency Response at Rated Power
10 Hz – 200 kHz (+0/-1 dB) 10 Hz – 200 kHz (+0/-1 dB)
20 Hz – 20 kHz (+0/-0.04 dB) 20 Hz – 20 kHz (+0/-0.04 dB)
THD+N at 1kHz (A Weight, 20 Hz – 20 kHz) THD+N at 1kHz (A Weight, 20 Hz – 20 kHz)
Rated Power: Rated Power:
< 0.0018% (< -95 dB) < 0.0056% (< -85 dB)
THD+N at 1kHz (A Weight, 20 Hz – 20 kHz) THD+N at 1kHz (A Weight, 20 Hz – 20 kHz)
50mW: 50mW:
< 0.001% (< -100 dB) < 0.0022% (< -93dB)
Channel Separation: Channel Separation:
> 120 dB > 90 dB
Signal-to-Noise Ratio Signal-to-Noise Ratio
(A Weight, 20 Hz – 20 kHz): (A Weight, 20 Hz – 20 kHz):
> 111 dB > 111 dB
Dynamic Range Dynamic Range
(1 kHz -60 dB, A Weight, 20 Hz – 20 kHz): (1 kHz -60 dB, A Weight, 20 Hz – 20 kHz):
> 120 dB > 115 dB
Output Impedance: Output Impedance:
0.5 Ohm 0.7 Ohm
(Test condition: Volume knob at Max position and an input signal to drive the output with 600 Ohm loads to the rated output power, unless otherwise noted.)
Contact us for further details or to arrange a demonstration