[Rollk2]

yes I have seen this post, but a friend that has got a HDP-R10 charges it in USB... I need a third person confirmation. 

 

[ALRAINBOW]

I own it . And it does not charge through the USB . The USB is only for firmware and upload music files.. Also the charger is 2 amps at 5 volts with a separate connection port.
And it drives well every IEM I have down to 16 ohm jh16 and 50 ohms . It also drives ny hd800
300 ohm,s .. Not blasting but loud . So as I have not measured the output voltage I cannot say
What is going on , as far as voltage output of batteries one cell or two in series or parrelle
AL.D.

 

[Veenrok]

I do still prefer the idea of using the Hibino battery configuration, though.

With IEM it would be better because of the battery life, but not with Headphones. I have dx100, and with 8,4V battery most of them (even with relatively small impendance for headphones) require high gain to drive them. For example my FA003 do. I'm not talking about volume, I mean sound quality. It is because of the battery voltage dx100 can drive headphones. Otherwise it would be meaningless to use such shcheme.

 

[Mython]

Quote:

With IEM it would be better because of the battery life, but not with Headphones. I have dx100, and with 8,4V battery most of them (even with relatively small impendance for headphones) require high gain to drive them. For example my FA003 do. I'm not talking about volume, I mean sound quality. It is because of the battery voltage dx100 can drive headphones. Otherwise it would be meaningless to use such shcheme.

 
 
Perhaps.
 
But I do not know what voltage up-regulation (if any) the Hibino may use, to meet requirements of the amplification stage, or what voltage down-regulation (if any) the DX100 may use to meet requirements of the amplification stage. Perhaps both DAPs feed the amplification stage at 5 volts, I don't know. I would not simply assume that the DX100 amplification stage runs at higher voltage than the HDP-R10, although it is, of course, a possibility.

 

[Loquah]

Quote:

Thank you and How is your AK 100 ?

Loving it, Rudi - thanks!
 
I'm actually in 2 minds about whether to mod mine or buy a second one to mod so I can do an A/B comparison. The R10 trade also complicates matters slightly because I'm very interested in that too.

 

[Veenrok]

Quote:

 
 
Perhaps.
 
But I do not know what voltage up-regulation (if any) the Hibino may use, to meet requirements of the amplification stage, or what voltage down-regulation (if any) the DX100 may use to meet requirements of the amplification stage. Perhaps both DAPs feed the amplification stage at 5 volts, I don't know. I would not simply assume that the DX100 amplification stage runs at higher voltage than the HDP-R10, although it is, of course, a possibility.

Whell, we know as a fact, that dx100 drives headphones. Can you name any DAP that drives headphones and has 3,3V battery? I know non. I've read that it is because at high gain (which is needed for good headphones) audiotract has requirements in Voltage to be able to provide signal/noise rate as well as amplifying/sound quality (not forgeting all of the capacitors).

 

[rudi0504]

Loving it, Rudi - thanks!

I'm actually in 2 minds about whether to mod mine or buy a second one to mod so I can do an A/B comparison. The R10 trade also complicates matters slightly because I'm very interested in that too.

You can buy from price of Japan the HDP R10
You pay only fee about 5%, nothing else

 

[rudi0504]

And with firmware version 1.2.7, does this ranking still stand, or did you not try it in the comparison, considering that by auditioning the DX100 on its own, latest 1.4.2 is the best sounding FW version yet?

First we done the dx 100 with previous firmware vs the 1,42 firmware , the 1,42 firmware sound better .
After that we compare to HDP R10 , HDP R10 SQ is better than dx 100 with the latest firmware 1,42 .
We have not done with firmware 1,27 .

 

[rudi0504]

Thank you Veenrok and Mython for sharing about the battery
I don't know about technicality
From direct comparison dx 100 gain is a little bit higher than HDP R10,both drive direct LCD 2 rev3
But the SQ HDP R10 is better than dx 100.

 

[AnakChan]

Quote:

Apparently, USB charging does not work on the HDP-R10:
 
http://www.head-fi.org/t/656501/what-is-the-best-most-economical-way-to-obtain-an-hdp-r10-japanese-version-dx100-in-usa#post_9363104

Originally Posted by Rollk2 /img/forum/go_quote.gif
 
yes I have seen this post, but a friend that has got a HDP-R10 charges it in USB... I need a third person confirmation. 

I own it . And it does not charge through the USB . The USB is only for firmware and upload music files.. Also the charger is 2 amps at 5 volts with a separate connection port.
And it drives well every IEM I have down to 16 ohm jh16 and 50 ohms . It also drives ny hd800
300 ohm,s .. Not blasting but loud . So as I have not measured the output voltage I cannot say
What is going on , as far as voltage output of batteries one cell or two in series or parrelle
AL.D.

 
Chaps maybe a cable similar to this may work (not exactly this cable of course since the diameter of the charging port is too big but cables with smaller diameter plugs exist). I know I've used this cable to charge my CLAS original via USB before.
 
So when there are reports of successful charging via USB for the HDP-R10, maybe they meant USB from the computer but still to the circular charging port of the HDP-R10.
 

 

[ALRAINBOW]

I have a hipower USB hub i will try with the USB but I remember reading in the Manuel
Charging only in that port. As for USB adaptor. No way on mine and I do not see a need to

 

[the wizard of oz]

Quote:

Quote:

And with firmware version 1.2.7, does this ranking still stand, or did you not try it in the comparison, considering that by auditioning the DX100 on its own, latest 1.4.2 is the best sounding FW version yet?

First we did a comparison between the DX100 with previous firmware vs. with the 1.4.2 firmware, and it sounded better with the 1.4.2 firmware.
After that we compared it to the HDP-R10, and the HDP-R10 sounded better than the DX100 with the latest firmware, 1.4.2.
We have not done comparison with firmware 1.2.7.

I think many would be very interested in a comparison between the HDP-R10 and the DX100 running the 1.2.7 firmware, since most thought it was the best, most balanced sounding firmware version.

 

[AnakChan]

I have a hipower USB hub i will try with the USB but I remember reading in the Manuel
Charging only in that port. As for USB adaptor. No way on mine and I do not see a need to

That's fine, of course. It's up to each owner's choice. But that's not the point. To say the HDP-R10 cannot be charged via USB isn't entirely true. It really depends on "which USB". If it's the microUSB on the HDP-R10, then it's true, but if its off the PC's USB, then it may not be true.

This option could be relevant to travelers who do not want the hassle of carrying "yet another charger" for their DAP but just a cable similar to the above would probably be more practical.

 

[lin0003]

I tried charging it via USB to 3.5mm DC via an iPad 2 slot and it doesn't work. The battery indicator shows that it is charging it and I left it for 1 hour and when I came back, the battery was exactly the same. But I get around 12 hours on mine so it is long enough to last me a day at least. I usually charge once every 2 days. 

 

[AnakChan]

Quote:

I tried charging it via USB to 3.5mm DC via an iPad 2 slot and it doesn't work. The battery indicator shows that it is charging it and I left it for 1 hour and when I came back, the battery was exactly the same. But I get around 12 hours on mine so it is long enough to last me a day at least. I usually charge once every 2 days. 

 
? I'm kinda lost on how your connection works. How does the iPad2 fit into the connection?
 
Edit: Check out Post #59 in this thread. This is the kind of connection I was referring.