OPPO HA-2 Portable Headphone Amplifier/DAC Discussion Thread
Feb 20, 2015 at 8:31 PM Thread Starter Post #1 of 4,874
Apr 2, 2014
OPPO HA-2 Portable Headphone Amplifier/DAC
OPPO HA-2 User Manual
Designs and specifications are subject to change without notice.
Dimensions (W x H x D)2.5 x 6.2 x 0.5 inches, 68 x 157 x 12 mm
Weight6.2 oz, 175 grams
Frequency Response20 Hz - 200 kHz
Audio-in Level1 Vrms
Line-out Level1 Vrms @ 0 dBFS
Recommended Headphone Impedance16 Ohm - 300 Ohm
Maximum Headphone Output Power300 mW into 16 Ohm
220 mW into 32 Ohm
30 mW into 300 Ohm
Output Jacks3.5 mm stereo headphone
3.5 mm stereo line-out
Input PortsAnalog: 3.5 mm stereo audio-in
Digital: USB A for iPod / iPhone / iPad; USB micro-B for smartphones with USB OTG feature and computers.
DAC ChipESS Sabre32 Reference ES9018-K2M
Input FormatStereo PCM, Stereo DSD (DoP v1.1 or native)
PCM Sampling Frequencies44.1 kHz  -  384 kHz, 16 / 24 / 32-bit
DSD Sampling Frequencies2.8224 MHz (DSD64), 5.6448 MHz (DSD128), 11.2896 MHz (DSD256, native mode only)
ProfileUSB 2.0, USB Audio 2.0
Built-in Battery type3000 mAh lithium polymer rechargeable battery
Battery Operation TimeApprox. 13 hours for analog source via Audio-in; approx. 7 hours for digital sources via USB
Charging TimeApprox. 1 hour 30 minutes

Normal: No bass boost applied. The frequency response is flat.

Bass Boost: Bass boost is turned on. Low frequency band gets a boost.

Bass Boost Detail: Bass frequency below 100 Hz gets about 5dB boost. The boost gradually decreases from 100Hz to about 500Hz where it reaches the normal non-boosted level.
Now that the HA-2 has been officially launched as of this afternoon (February 20th, 2015) I thought it would be appropriate to start a new discussions thread that was originally started in the Sponsors Forum when we revealed the HA-2 and the PM-3 to the public for the first time at the Rocky Mountain Audio Festival in 2014.
All those who have beta tested the HA-2, we thank you, and we hope that you will contribute immensely to on the HeadFi forums. Your NDAs are over, so if you had any tribulations about posting, don't. Post to your heart's contentment.
Feb 20, 2015 at 9:19 PM Post #4 of 4,874
20hz to 200kHz!

That's pretty impressive frequency response.
It can cover the real 24bit 192kHz files.

When can we see this on Amazon?
how does it sound? Does it worth $299?

You realize that 16/44.1 can cover the same frequency range as 24/192. Even 20hz to 200kHz (though you can't hear over 20kHz unless you're a dog).

The bit rate/sampling rate is not a measure of frequency range.
Feb 21, 2015 at 12:37 AM Post #8 of 4,874
We had the pleasure of hearing the HA-2 during CES in January, and both of us thought it a superb unit. The leather covering reminds me of a vintage Jaguar, feels great, isn't flashy, but secure and luxurious. The controls were solid and well-machined, and we listened to the upcoming PM-3's with it. Even with AAC files on an iPhone6+, the difference between the iPhones audio section and the HA-2 was instantly discernible, with dynamics, texture, and soundstage all significantly improved. 
When we heard the HA-2 attached to a MacBook Pro with lossless and high-res audio, the PM-3s really kicked into gear. We only had a short time, so a longer review will be forthcoming, but compared to other units I've tried, the HA-2 seemed a serious contender. The build quality was really interesting, with a bit of a vintage feel, yet housing serious firepower. I think that the PM-3 (very portable), and the and HA-2 is going to quickly become a portable dream team for many folks. We worked with final, pre-production models, so looking forward to the actual production run units. 
Feb 21, 2015 at 4:10 AM Post #12 of 4,874
I'm very pleased by what Oppo have done. Got a by ch of pretty pictures of it plus a few words of praise (and caution) up here.

EDIT: I can't believe it costs 300$. Way too much machine for that.

Nice read. When's the full review due? 

Can't wait. This one is definitely in my radar.
Feb 21, 2015 at 5:54 AM Post #14 of 4,874
damn that price 
 even FiiO can't compete entirely, especially design. 

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