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# I Basso HDP R 10 is IBasso DX 100 Japan Version impression and appreciation thread - Page 22

My understanding is that it is running on 5volts with a 4800mAh battery.

Battery voltage was discussed earlier in this very thread, on page 11.

Quote:
Originally Posted by Mython

Battery voltage was discussed earlier in this very thread, on page 11.

Guess I only got one answer right  So it is 3.7v with 4800mAh battery.

Quote:
Originally Posted by AlanYWM

Guess I only got one answer right  So it is 3.7v with 4800mAh battery.

In truth, there is still some uncertainty, in spite of the intense discussion in that part of the thread! LOL!

What I'm really, really not clear about is if iBasso are perhaps downregulating the DX100 to 5 volts (i.e. using a 5 volt regulator), and/or upregulating the HDP-R10 voltage to 5 volts.

I'm still hoping someone with hard facts about this will step in and clear up the uncertainty

Quote:
Originally Posted by Veenrok

I can't understand, how can a 3,3V battery drive head phones better than a 8,5V battery of dx100. HDP R 10 is made for IEM.

I suspect both DX 100 & HDP-R10 has the similar power (W) but different in term of voltage and current in circuitry design.

I just based on theory: W (power) = V (voltage) x I (current)

DX 100 has higher voltage but lower current

HDP-R10 has lower voltage but higher current

OPA627 desires +-9V, if it's less than that you're supposed to use ADA4627.

The Monster Audio MA9 is around +-9V, I think it uses two 8.6V batteries, one for + and one for -, the voltage discussions surrounding the R10 raise concern.

Quote:
Originally Posted by Theta Alpha 1

OPA627 desires +-9V, if it's less than that you're supposed to use ADA4627.

The Monster Audio MA9 is around +-9V, I think it uses two 8.6V batteries, one for + and one for -, the voltage discussions surrounding the R10 raise concern.

To my ears, the listening volume bewteen the R10 and DX100 is about 4 steps with the DX100 being louder. But the R10's battery life is considerably longer than the DX100. This is based on my usage of the DX100 for more than 7months and the recently acquired R10. SQ wise, initial impression is that they are both very similar.

I agree with Alan, the DX100 is louder than HDP-R10 by a few steps of the digital volume control. Sound wise R10 is closer to DX100 with FW 1.4.2 than with previous FW versions, although they are definitely not identical.

Quote:
Originally Posted by AlanYWM

To my ears, the listening volume bewteen the R10 and DX100 is about 4 steps with the DX100 being louder. But the R10's battery life is considerably longer than the DX100. This is based on my usage of the DX100 for more than 7months and the recently acquired R10. SQ wise, initial impression is that they are both very similar.

When you mentioned  the "R10's battery life is considerably longer than the DX100",
is this your actual experience when using both of them?

How much longer can R10 last comparing to DX100 when both of them 100% charged?

Another question, since you have both of them, which has a louder "pop" noise?

Edited by cyberalpha11 - 5/26/13 at 10:09pm

Voltage supply doesn't affect volume levels, it affects performance a.k.a. sound quality of IC's specified for certain minimum and maximum voltage supply levels.

The OPA627 sounds okay at low voltage, but a high-end PMP ideally shouldn't break rules.

If the DX100 is really using OPA627, why did they sandpaper it away?  That's an expensive IC, you'd think they'd like to showcase it's presence.

If they're in Shenzhen after all, perhaps they're using cloned chips, I saw their blue coloured AD797's and wonder where they found blue AD797's from?

I don't mean to bicker, I just think customers spending close to \$1K should have this information.

Quote:
Originally Posted by cyberalpha11

When you mentioned  the"R10's battery life is considerably longer than the DX100",
is this your actual experience when using both of them?

How much longer can R10 last comparing to DX100 when both of them 100% charged?

Another question, since you have both of them, which has a louder "pop" noise?

Yes. I do own both DAPs and this is my experience. But I have not tested both of them side by side for battery duration. So I cannot give a definite number. I only know that based on using my DX100 for more than 7mths, the play time of the R10 is definitely longer. And it isn't by a small margin. If I have to make a guess, it may be about 2-3hrs longer. So assuming the DX100 can last 7hrs, I would reckon the R10 to last about 10hrs. That is considerable to me. Not sure about you.

As for the "pop" sound, I do feel that the "pop" from the R10 is about as loud as my DX100. Naturally, I did not compare them side by side (who would?) so take that with a big pinch of salt. It is definitely not something I like to hear for sure. Haha.
Quote:
Originally Posted by AlanYWM

Yes. I do own both DAPs and this is my experience. But I have not tested both of them side by side for battery duration. So I cannot give a definite number. I only know that based on using my DX100 for more than 7mths, the play time of the R10 is definitely longer. And it isn't by a small margin. If I have to make a guess, it may be about 2-3hrs longer. So assuming the DX100 can last 7hrs, I would reckon the R10 to last about 10hrs. That is considerable to me. Not sure about you.

As for the "pop" sound, I do feel that the "pop" from the R10 is about as loud as my DX100. Naturally, I did not compare them side by side (who would?) so take that with a big pinch of salt. It is definitely not something I like to hear for sure. Haha.

I guess your information is important for those who want to choose between HDP-R10 & DX100.

Quote:
Originally Posted by cyberalpha11

I guess your information is important for those who want to choose between HDP-R10 & DX100.

You are more than welcome.

Before I forget, on the R10, expect a 3-4sec delay before your song is played. It is only for the first song in the album. The delay is much shorter in the DX100. Not a big deal to me but may irritate some folks.
Edited by AlanYWM - 5/27/13 at 1:56am

Hibione promised to solve these delay and pop issues. If they do it, they will be my heroes.

Quote:
Originally Posted by AmberOzL

Hibione promised to solve these delay and pop issues. If they do it, they will be my heroes.

Just skeptical if Hibione can resolve the 3 sec delay & also pop issue by firmware change only.

In my opinion, in order to solve these design flaws, most probably it will involve some components change or worse case the internal circuitry change.

I just curious why iBasso did not take serious effort to resolve those known issues.

Edited by cyberalpha11 - 5/27/13 at 2:25am
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