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HA-INFO U2 PLUS DAC

post #1 of 43
Thread Starter 

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HA-INFO U2 Plus

 

 

 

 

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Edited by Mr Vicarious - 1/20/15 at 8:56am
post #2 of 43

It sounds so good < I just got the modified version of it from my friend

It can drive HD800 and HE5 easily ,sounds even better than my HM801 unbelieveable

 

 

I would say the best value ever for me is this combination

Creative aurvana mod with cardas cable and a little mod in side (total cost = 133 $ ) + modded HA U2 Dac amp (cost total  around 150 usd. I'm not quite sure cuz he just build in a small amp inside ).

 

I will listen to it with my JH16 tomorrow06102011444.jpg


Edited by coolcat - 10/5/11 at 11:48am
post #3 of 43
Thread Starter 

Can you tell me what mods exactly your friend did to the unit? I would be really interested to know.

post #4 of 43

I will ask him,but I don't know if he will answer (even though we're friend :( ),he likes to keep it secret.

I think he can tell me about the opamp and how he built his amp in Generall,if I get some information from him ,I will tell you

post #5 of 43

hello mate am thinking of buying the ha info u2 , is it in your opinion a good buy and where did you optain your op amps. thanks

post #6 of 43
Thread Starter 

Yes, as I said in my review, I definitely recommend the HA INFO. The op amps can purchased from eBay.If you buy it, give it at least 80 hours burn in to reach it's full potential.


Edited by Mr Vicarious - 10/12/11 at 4:23pm
post #7 of 43
Quote:
Originally Posted by Mr Vicarious View Post

Can you tell me what mods exactly your friend did to the unit? I would be really interested to know.


 

Hi, About the answers for your Questions.(Sorry for my poor English )

..... First of all I've done hardly modded to every thing I own for the best performance of itself can do. ( I means the chips, the circuits and the topology)

 

1) Find out the weak point and Decrease it.

....The power supply ...>>> To change some parts with the power full ,Faster and make sure the current can smoothly  flow.

....The signal parts  ....>>> To upgrade, replace with the more good sounding parts

2) As my modded concept above  ,,, thinking about  "How to upgrade  the overall performance and setting the GOAL  (ex. 10X worth of it price) "

.... Do it follow my dreams and enjoy to got the result.Copy of DSCF4663.JPG

 

Note: My next step modify.

Using the external power supply  0-28V 1.2A Linear Regulator (and review the amplification gain of the amp. stage) for more power full  and enjoy to drive the HE6

 


Edited by wat12 - 10/19/11 at 2:30am
post #8 of 43
I just pulled the plug on this sucker, what can I expect, i've never owned a DAC/AMP before. (Except fiio e3, which was awesome) I'm using a pair of old, bassy russian orthos - TDS5M.
post #9 of 43

Interested in buy one of these but I'm not 100% confident in the dimensions I'm seeing listed on various site (145mm(L) x 31mm(H) x 75mm (W) - Just looks a lot smaller than that so wondering if anyone would be kind enough to confirm these for (unfortunately size is an issue for me).

Thanks.

post #10 of 43

Anyone know how one of these compares to a FiiO E10?

post #11 of 43

Is it better than MM 02 US ?

post #12 of 43
Quote:
Originally Posted by coolcat View Post

 

I will listen to it with my JH16 tomorrow


 

How did it sound with your JH16?

 

post #13 of 43

I agree it's the best budget USB DAC headphone amp but forget the OPA you mention biggrin.gif and put a serious OPA like the Audio-GD OPA-EARTH and you get a true killer amp!

Ok you have to sacrifice some aesthetical but it worth the effort...The sound of stock HA INFO U2 PLUS is quite decent but with the Audio-GD OPA the difference is spectaculareek.gif

With stock and OPA2134 the cymbal sound like 192kbps mp3, with the Audio-GD it sound like 900kbps FLAC. The modified HA INFO U2 PLUS is even better than my previous setup:Fubar II USB DAC and Little Dot MK4 SEbeyersmile.png

 

HA INFO.JPGHA INFO2.JPG

post #14 of 43
Thread Starter 

Much better.


Edited by Mr Vicarious - 7/22/12 at 6:39am
post #15 of 43
Thread Starter 

That's one serious looking op-amp! How much was it and is it readily available?

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