[Anaxilus]

Quote:

They are wrong! 

 On the other hand the units are being further tweaked to get the most out of them, that is a good thing. 

How so?  Fixing an improperly assembled transistor?  The AD8620 is canned.  Sorry, but I am a bit let down by the cancelled 'tweak'.  I was letting it fester till I read your post.  

 

[radiohead7]

I was bit disappointed too by no upgrade maybe you can request a custom upgrade for more money if the price is right.I am basing it on there reputation that it will sound good anyway but your always left wondering.

 

[Anaxilus]

Quote:

I was bit disappointed too by no upgrade maybe you can request a custom upgrade for more money if the price is right.I am basing it on there reputation that it will sound good anyway but your always left wondering.

OK, I'll play.  What would it cost to upgrade the opamp to the AD8620?

 

[radiohead7]

Me too if the price is reasonable .....we would have to find out if he will do it and how much

 

[radiohead7]

Ok ....I asked about a paid upgrade and they said it would sound worse due to it not mixing well with the other components. So the current parts should sound great.

 

[yooss]

I'm seeing some initial impressions from erji.net but can't read it...

 
What I can do is read up to the post titles...

 

[Hero Kid]

Yeah the way they black google translate (and similar sites) is strange. Sometimes they do, sometimes they don't.
I haven't been able to pinpoint it but it seems it works for a limited time at the start, and as you start to use it more it stops working.

 

[Adamus00]

I wonder what is minimum resistance of headphones, that could be used with HM-602? Is it 32 Ohm ?   If it is true, it makes some phones (especially IEMs) not usable with this player...

 

[.Sup]

Quote:

I wonder what is minimum resistance of headphones, that could be used with HM-602? Is it 32 Ohm ?   If it is true, it makes some phones (especially IEMs) not usable with this player...

:€ I didn't know there was minimum impedance limit.

 

[mrarroyo]

I have used the HiFiMAN RE-252 with the HM-801 with great results. Good luck.

 

[.Sup]

thanks miguel 

 

[violinvirtuoso]

Quote:

I wonder what is minimum resistance of headphones, that could be used with HM-602? Is it 32 Ohm ?   If it is true, it makes some phones (especially IEMs) not usable with this player...

When did they assign a minimum resistance for the HM-602? I can't think of a DAP that has this "feature". Some DAPs aren't made to be used with lower impedance phones (ex. Rocoo Studio), but they can still drive them. Please explain.

 

[DaveBSC]

Quote:

I wonder what is minimum resistance of headphones, that could be used with HM-602? Is it 32 Ohm ?   If it is true, it makes some phones (especially IEMs) not usable with this player...

My 24 Ohm Sony MDR-7509 works just fine with the HM-801. No hiss or anything like that.

 

[Hero Kid]

~

 

[Adamus00]

Quote:

When did they assign a minimum resistance for the HM-602? I can't think of a DAP that has this "feature". Some DAPs aren't made to be used with lower impedance phones (ex. Rocoo Studio), but they can still drive them. Please explain.

HM-602 has built-in amp, the lower impedance of phones, the higher current intensity in circuit.  Too high current intensity in ciruit can burn some electronics. I can't explain it simplier and shorter

" class="bbcode_smiley" height="" src="http://files.head-fi.org/images/smilies//wink.gif" title="

" width="" /> I am going to use it with JVC (16 Ohm). So it matters for me if it can work with it, or I will have to put external amp between (using LOD) (please forgive me my english

" class="bbcode_smiley" height="" src="http://files.head-fi.org/images/smilies//wink.gif" title="

" width="" /> ).