[jkross22]

Why won't your Note 4 output a digital signal for the HA-2 to put through its DAC and amp, and not just the HA-2's amp?

 

[flagsmx]

  I have a question for you Oppo Guys, what are your warranties against items getting lost during transit? I saw you don't have Fedex or UPS options to deliver to mexico, only the standard USPS service.. and I'm worriend
 
I ordered On Feb. 26 a set of earphone tips from company Comply foam using standard USPS and they haven't arrived, so I worte to them and they have refunded my order, Kudos to comply I will rebuy from them again but this time using faster ship with tracking

Just call the customer service... I ordered mine, and although the page says USPS, they send it over Fedex... Arrived as expected and just cover the tax related (like $800 MXP).
 
Hope this helps

 

[stickboy85]

Hi Guys,
I'm new to the forums so forgive me if this is a stupid question...
Recently purchased the HA2, would the HE-560's be a good match for it?

 

[money4me247]

Hi Guys,
I'm new to the forums so forgive me if this is a stupid question...
Recently purchased the HA2, would the HE-560's be a good match for it?

maybe this will help a bit for the technical aspect of how much power you need.
 
http://auditry.blogspot.com/2014/02/headphone-amp-power-calculator.html

 

[gerelmx1986]

 

  I have a question for you Oppo Guys, what are your warranties against items getting lost during transit? I saw you don't have Fedex or UPS options to deliver to mexico, only the standard USPS service.. and I'm worriend
 
I ordered On Feb. 26 a set of earphone tips from company Comply foam using standard USPS and they haven't arrived, so I worte to them and they have refunded my order, Kudos to comply I will rebuy from them again but this time using faster ship with tracking

Just call the customer service... I ordered mine, and although the page says USPS, they send it over Fedex... Arrived as expected and just cover the tax related (like $800 MXP).
 
Hope this helps

Thanks mate

 

[miceblue]

Hi Guys,
I'm new to the forums so forgive me if this is a stupid question...
Recently purchased the HA2, would the HE-560's be a good match for it?

The HA-2 should be fine with the HE-560 unless you listen to music super loud.



[rule]
Huh...that's really strange. The Onkyo HF player downsamples DSD128 music to 176.4 kHz with my friend's iPhone 5S, but not my iPhone 4S; both are on DoP mode with upsampling off. Weirdness...

I do like the HA-2 more than the iPhone's headphone output though. I thought the iPhone sounded pretty warm and grainy in comparison.

 

[tarainfo]

Just got my new HA-2 yesterday
Combined with the new onkyo player that upcoverts aac files to DSD it turns my iPhone 6 into a true high-res player
Been listening on my Sennheiser 600 headphones
Just a pleasure to listen to
I'm really pleased with it
Considering I own an Ak120 and an Ak 240 that is a big surprise for me

 

[gixxerwimp]

 

miceblue /img/forum/go_quote.gif

stickboy85 /img/forum/go_quote.gif

Hi Guys,
I'm new to the forums so forgive me if this is a stupid question...
Recently purchased the HA2, would the HE-560's be a good match for it?

The HA-2 should be fine with the HE-560 unless you listen to music super loud.

 
I asked a similar question and miceblue was kind enough to do some calculations.
http://www.head-fi.org/t/755879/oppo-ha-2-portable-headphone-amplifier-dac-discussion-thread/630#post_11458248
 

Spoiler: Technical stuff

As per OPPO's official specifications:
https://www.oppodigital.com/headphone-amplifier-ha-2/headphone-amplifier-HA-2-Features.aspx
300 mW into 16 Ohm, or 2.19 Vrms voltage output, 136.93 mA current output
220 mW into 32 Ohm, or 2.65 Vrms, 82.91 mA current output
30 mW into 300 Ohm, or 3 Vrms voltage output, 10 mA current output

So 136.93 mA is the maximum current the HA-2 can deliver, and 3 Vrms is the maximum voltage the HA-2 can deliver

From Innerfidelity's measurements:
http://www.innerfidelity.com/images/MrSpeakersAlphaDog2014.pdf
Impedance @ 1kHz: 47 Ohms
Volts RMS required to reach 90dB SPL: 0.208 Vrms
Power Needed for 90d BSPL 0.92 mW

And deriving the current requirement from that, 4.42 mA current needed to reach 90 dB SPL.

I'm pretty sure no one can deny that the HA-2 is capable of providing enough power (voltage and current) output to the Alpha Dog to reach 90 dB SPL.

Say you listen to music loud, and by loud, I mean that there are music transients that reach 111 dB SPL.
111 dB SPL - 90 dB SPL = 21 dB SPL

According to physics, you double the power needed for every +3 dB increase and since we need do reach +21 dB SPL, that means 2^7 or 128 times the power output.

0.92 mW * 128 = 117.76 mW needed to reach 111 dB SPL, or 2.35 Vrms voltage and 50 mA current

I'm pretty sure no one can deny that the HA-2 is likewise, capable of providing enough power output to the Alpha Dog to reach 111 dB SPL, so I would say yes, the Alpha Dog can be driven properly from the HA-2 even at high volume levels. Fortunately planar magnetic headphones can be treated as a single resistor because their driver design isn't really inductive-inducing and the impedance plot is basically perfectly flat, so the math here is pretty accurate relatively speaking.




Repeating this process for the HE-560:
http://www.innerfidelity.com/images/HiFiMANHE5602014.pdf
Volts RMS required to reach 90dB SPL: 0.330 Vrms
Impedance @ 1kHz: 43 Ohms
Power Needed for 90d BSPL 2.53 mW

And deriving the current requirement from that, 7.67 mA current needed to reach 90 dB SPL.

Right away we can see that the power needed to reach 90 dB SPL is much higher than the Alpha Dog, but the HA-2 still has the capability to produce said power specifications.

Cutting out a bunch of math, the HE-560 would need 323.84 mW (86.78 mA and 3.37 Vrms) to reach 111 dB SPL, which the HA-2 cannot provide because of limited voltage output (which is not surprising since a battery's voltage output usually dictates how much voltage the amplifier can output).

However, at just 3 dB less at 108 dB SPL, the HA-2 can provide enough juice to the HE-560.
Cutting out more math, the HE-560 needs 161.92 mW (61.36 mA and 2.63 Vrms), which the HA-2 can provide.

So yes, the HA-2 would be able to sufficiently drive the HE-560 unless you listen to music super loud.

 
www.audiobot9000.com is an automated headphone/amp comparison tool. It makes estimations if the specified impedances of the phone/amp do not match exactly.
http://www.audiobot9000.com/match/hifiman/he-560/with/oppo/ha-2
 

Peak SPL: 109.7 dB * This amp has enough power for these headphones * This value was approximated from the power output at 32 Ω because the impedances do not match exactly.

 
I tried http://auditry.blogspot.com/2014/02/headphone-amp-power-calculator.html, but I couldn't find the output impedance of the HA-2. I remember somebody (Hastur?) saying it was pretty low, so I used 1Ω.
 

For 110dB SPL, the HE-560 needs Min Voltage Output: 2.28Vrms Min Power Output: 101.93 mWrms

 
The HA-2 puts out 220 mW (2.19 Vrms) at 32 Ω and 30 mW (3 Vrms) at 300 Ω, so it looks like there should be enough power to drive the HE-560 to a decent sound level. Whether or not it can do it well with control is something else.

 
Anybody out there have both the HA-2 and HE-560 who can comment on how they sound together??

 

[steffi]

What differences do you see when you pair the HA-2 with the AK240 then?

 

[Sonic Defender]

   
I asked a similar question and miceblue was kind enough to do some calculations.
http://www.head-fi.org/t/755879/oppo-ha-2-portable-headphone-amplifier-dac-discussion-thread/630#post_11458248
 

Spoiler: Technical stuff

As per OPPO's official specifications:
https://www.oppodigital.com/headphone-amplifier-ha-2/headphone-amplifier-HA-2-Features.aspx
300 mW into 16 Ohm, or 2.19 Vrms voltage output, 136.93 mA current output
220 mW into 32 Ohm, or 2.65 Vrms, 82.91 mA current output
30 mW into 300 Ohm, or 3 Vrms voltage output, 10 mA current output

So 136.93 mA is the maximum current the HA-2 can deliver, and 3 Vrms is the maximum voltage the HA-2 can deliver

From Innerfidelity's measurements:
http://www.innerfidelity.com/images/MrSpeakersAlphaDog2014.pdf
Impedance @ 1kHz: 47 Ohms
Volts RMS required to reach 90dB SPL: 0.208 Vrms
Power Needed for 90d BSPL 0.92 mW

And deriving the current requirement from that, 4.42 mA current needed to reach 90 dB SPL.

I'm pretty sure no one can deny that the HA-2 is capable of providing enough power (voltage and current) output to the Alpha Dog to reach 90 dB SPL.

Say you listen to music loud, and by loud, I mean that there are music transients that reach 111 dB SPL.
111 dB SPL - 90 dB SPL = 21 dB SPL

According to physics, you double the power needed for every +3 dB increase and since we need do reach +21 dB SPL, that means 2^7 or 128 times the power output.

0.92 mW * 128 = 117.76 mW needed to reach 111 dB SPL, or 2.35 Vrms voltage and 50 mA current

I'm pretty sure no one can deny that the HA-2 is likewise, capable of providing enough power output to the Alpha Dog to reach 111 dB SPL, so I would say yes, the Alpha Dog can be driven properly from the HA-2 even at high volume levels. Fortunately planar magnetic headphones can be treated as a single resistor because their driver design isn't really inductive-inducing and the impedance plot is basically perfectly flat, so the math here is pretty accurate relatively speaking.




Repeating this process for the HE-560:
http://www.innerfidelity.com/images/HiFiMANHE5602014.pdf
Volts RMS required to reach 90dB SPL: 0.330 Vrms
Impedance @ 1kHz: 43 Ohms
Power Needed for 90d BSPL 2.53 mW

And deriving the current requirement from that, 7.67 mA current needed to reach 90 dB SPL.

Right away we can see that the power needed to reach 90 dB SPL is much higher than the Alpha Dog, but the HA-2 still has the capability to produce said power specifications.

Cutting out a bunch of math, the HE-560 would need 323.84 mW (86.78 mA and 3.37 Vrms) to reach 111 dB SPL, which the HA-2 cannot provide because of limited voltage output (which is not surprising since a battery's voltage output usually dictates how much voltage the amplifier can output).

However, at just 3 dB less at 108 dB SPL, the HA-2 can provide enough juice to the HE-560.
Cutting out more math, the HE-560 needs 161.92 mW (61.36 mA and 2.63 Vrms), which the HA-2 can provide.

So yes, the HA-2 would be able to sufficiently drive the HE-560 unless you listen to music super loud.

 
www.audiobot9000.com is an automated headphone/amp comparison tool. It makes estimations if the specified impedances of the phone/amp do not match exactly.
http://www.audiobot9000.com/match/hifiman/he-560/with/oppo/ha-2
 

Peak SPL: 109.7 dB * This amp has enough power for these headphones * This value was approximated from the power output at 32 Ω because the impedances do not match exactly.

 
I tried http://auditry.blogspot.com/2014/02/headphone-amp-power-calculator.html, but I couldn't find the output impedance of the HA-2. I remember somebody (Hastur?) saying it was pretty low, so I used 1Ω.
 

For 110dB SPL, the HE-560 needs Min Voltage Output: 2.28Vrms Min Power Output: 101.93 mWrms

 
The HA-2 puts out 220 mW (2.19 Vrms) at 32 Ω and 30 mW (3 Vrms) at 300 Ω, so it looks like there should be enough power to drive the HE-560 to a decent sound level. Whether or not it can do it well with control is something else.
 
Anybody out there have both the HA-2 and HE-560 who can comment on how they sound together??

My E12 can't drive the 560 that well to my tastes, but others might disagree. I was able to put it at full on high gain with no issues at all. I don't think the E12 can truly respond to the demands of the 560 for very demanding music at moderate to loud volumes. Not sure about the HA-2 though.

 

[gerelmx1986]

Just got my new HA-2 yesterday
Combined with the new onkyo player that upcoverts aac files to DSD it turns my iPhone 6 into a true high-res player

I disagree those lossy AACs can't be true DSD... trash in--> Trash out... ti's the same lossy file but padded bits to 0... it may work with Lossless ALAC files tough

 

[miceblue]

I personally don't care for the E12's sound, regardless of the headphones being driven. So I think the E12 will drive the HE-560 just fine, but it won't sound good compared to other amps because the amp itself doesn't sound very optimal to me and it won't have the best synergy.

 

[Sonic Defender]

I personally don't care for the E12's sound, regardless of the headphones being driven. So I think the E12 will drive the HE-560 just fine, but it won't sound good compared to other amps because the amp itself doesn't sound very optimal to me and it won't have the best synergy.

The E12 isn't that bad, have a heart! I have started using a PHA 3 lately, much nicer sounding, but not really pocket portable.

 

[Wildcatsare1]

My E12 can't drive the 560 that well to my tastes, but others might disagree. I was able to put it at full on high gain with no issues at all. I don't think the E12 can truly respond to the demands of the 560 for very demanding music at moderate to loud volumes. Not sure about the HA-2 though.

I am in agreement, my IFi Nano iDSD and AK 100 II do not drive my 560's well. If I were to purchase the HA-2, I would probably stick to my Alclair' RSM or Grado.

 

[gixxerwimp]

 

Sonic Defender /img/forum/go_quote.gif My E12 can't drive the 560 that well to my tastes, but others might disagree. I was able to put it at full on high gain with no issues at all. I don't think the E12 can truly respond to the demands of the 560 for very demanding music at moderate to loud volumes. Not sure about the HA-2 though.

 
Which E12 do you have?
http://www.fiio.net/en/products/33/comparisons
The E12A @ 420 mW (16 Ω/THD+N<1%) looks similar in power output to the HA-2. The E12 @ 880 mW (32 Ω/THD+N<1%) looks to have way more power than the HA-2. Would you say you like to listen to your music loud?