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Fiio X5 Thread - info updated on Jan 17th 2014 - Page 99

post #1471 of 12013
Quote:
Originally Posted by JamesFiiO View Post
 

sure, but I remembered that I should posted it before, anyway, we have noting to hide and don't like to remark or erase the model number.

 

4 OPA1612 worked as I/V convertor and low fass filer and votage amplifer. OPA1612 includes two channels in one chip. and we used OPA1611( single channel ) in our E12.

 

2 LMH6643 as buffer, each for one channel , and LMH6643 includes two channels in one chip.

 

And don't make mistake again, T.R.A.N.C.E the amp section is powered by +/- 6V (12 V swing )

 

James, you just made me very excited! I really like the choice of op amps. LMH6643 has always been a favorite buffer of mine. And OPA1612 is a great choice for the filter and amplifier, very accurate, balanced and detailed. 

 

Some purists might question the use of dual channel op amps though, is there a reason you went with dual channel op amps, rather than single channel like the OPA1611 and LMH6642?

 

Let me again say how happy I am with the op amp selection! James you really should try and release the X5 earlier than March. Make it December so we can all give X5's to each other for christmas!

post #1472 of 12013
Quote:
Originally Posted by T.R.A.N.C.E. View Post
 

 

James, you just made me very excited! I really like the choice of op amps. LMH6643 has always been a favorite buffer of mine. And OPA1612 is a great choice for the filter and amplifier, very accurate, balanced and detailed.

 

Some purists might question the use of dual channel op amps though, is there a reason you went with dual channel op amps, rather than single channel like the OPA1611 and LMH6642?

 

Let me again say how happy I am with the op amp selection! James you really should try and release the X5 earlier than March. Make it December so we can all give X5's to each other for christmas!

 

the space limited.

post #1473 of 12013
Quote:
Originally Posted by JamesFiiO View Post

Not sure, but it should supports DSD when it launch outside China

Thanks, James... Will get this as soon as it is available in Taobao..gd luck with the release!
post #1474 of 12013
But the question is:
The DAC inside X5 will support DSD natively or will be just another gimming like in AK120?
post #1475 of 12013
Quote:
Originally Posted by musicday View Post

But the question is:
The DAC inside X5 will support DSD natively or will be just another gimming like in AK120?

 

The PCM1792A is a monolithic CMOS integrated circuit that includes stereo digital-to-analog converters and support circuitry in a small 28-lead SSOP package. The data converters use TI’s advanced segment DAC architecture to achieve excellent dynamic performance and improved tolerance to clock jitter. The PCM1792A provides balanced current outputs, allowing the user to optimize analog performance externally. The PCM1792A accepts PCM and DSD audio data formats,

 

http://www.ti.com/product/pcm1792a#relprod

post #1476 of 12013

Excellent, can't wait for the release!!!

One question: will it have an ( relatively ) easy replaceable battery? ( or it will be soldered to the board... )

Best regards.

post #1477 of 12013
Hi all,
Quote:
Originally Posted by JamesFiiO View Post

4 OPA1612 worked as I/V convertor and low fass filer and votage amplifer. OPA1612 includes two channels in one chip. and we used OPA1611( single channel ) in our E12.

2 LMH6643 as buffer, each for one channel , and LMH6643 includes two channels in one chip.

That's a lot of chips... Twice as much as needed, no ? This plus the question about the headphone plug :
Quote:
Originally Posted by JamesFiiO View Post

you will find the difference in the connetor, both micro usb socket and headphone socket if someone compare the two photos. anyone find it?

Plus the fact that the chosen dac chip is Balanced... Would the x5 be balanced on TRRS plugs ?
post #1478 of 12013
Quote:
Originally Posted by Burndav View Post

Hi all,
That's a lot of chips... Twice as much as needed, no ?
 

 

Not twice as much. PCM1792 outputs differential current signal, so each channel needs two opamp (*one dual channel chip) to convert to differential voltage, then follows by one dual channels opamp for both differential-to-single ended conversion as well as LPF. That means the DAC itself will need either 3 dual channels opamp or 6 mono channels opamp. Then FiiO uses another dual channels opamp for gain stage, followed by 2 dual for buffer. So:

 

2 dual for I/V + 1 dual for differential-to-single-ended (LPF) + 1 dual for gain + 2 dual for buffer = 6 dual

 

The last one (7th) is probably a separated dual channels buffer after the LPF for line-out.

post #1479 of 12013
Quote:
Originally Posted by Burndav View Post

Hi all,
That's a lot of chips... Twice as much as needed, no ? This plus the question about the headphone plug :
Plus the fact that the chosen dac chip is Balanced... Would the x5 be balanced on TRRS plugs ?

+1 for that question, I also would like to know if it will be balanced headphone out?

post #1480 of 12013
Guys pleeeese tell me... The x5 will support USB input from computer as the x3 with the last update??
post #1481 of 12013
Thread Starter 
Quote:
Originally Posted by gorbenzer View Post

Guys pleeeese tell me... The x5 will support USB input from computer as the x3 with the last update??

In short, yes -- X5 can work as USB DAC just like X3 does. Please read the 1st post or previous 5 pages and you will find the answer.
post #1482 of 12013

So far, there is nothing not to like from the FiiO X5:

 

1) Dual micro SD inputs means large capacity

 

2) I like how FiiO is aiming to make the sound signature transparent

 

3) Price may be higher than X3 but it seems reasonable given what's being offered and looking at the alternatives

 

4) The estimated March release date is abit late as I was expecting Jan but I can leave with that. Gives me more breathing room to get a new phone and laptop.

 

5) Size looks good.

 

All in all, what I'm interested in now are some measurements, battery life estimates, and how the UI works. But realistically, I will only expect that after the player is released or close to completion. 

post #1483 of 12013
James how many beta testers in the USA are there if any?
post #1484 of 12013
Quote:
Originally Posted by AmberOzL View Post
 

+1 for that question, I also would like to know if it will be balanced headphone out?

 

I think it is very obviously not going to be any balanced headphone-out by looking at the opamp usage. To get balanced headphone, you will need 10 opamps instead of 6 (*double for everything after I/V stage).


Edited by ClieOS - 10/28/13 at 7:41pm
post #1485 of 12013
Quote:
Originally Posted by howdy View Post

James how many beta testers in the USA are there if any?


He has already stated no beta testers out of China.

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