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FiiO X3 mod - AD8397 to AD8620 - Page 11

post #151 of 207
Quote:
Originally Posted by wakibaki View Post
 

So sorry to trample on your delicate sensitivities. My advice, grow a thicker skin and just push ahead with the 'experiment' next time without asking. Wire in a dual-rail opamp, after all the worst that it can cost you is the price of a new X3...   :smile: 

 

www

 

Or the price of whatever headphone that you choose to test the sound with.  :veryevil:

post #152 of 207
Quote:
Originally Posted by s0lar View Post
 

I just checked and my iBasso D4 uses AD8616 as DAC output opamp. It works single supply 2.7V to 5V and is a CMOS rail-to-rail opamp, just like the AD8692.

AD8066 is a FET opamp.

iBasso D4 has dual DACs though.

You should be carefull since clipping can occur at the DAC output when you swap the opamp. I have no idea about the signal that the DAC puts out, safest is to ask Fiio directly.

 

I took your advice and ordered some AD8656 and ADA4841-2. Both were mentioned in iBasso D1 thread, the latter was recomended on erji.net (I used google translate).

So another day another swap ;)

 

I've soldered ADA4841-2 as DAC output IC and LMH6643 as headphone amp (as per erji.net and D1 threads). I've listened the DAP for literaly 5 minutes before going back to work, so no opinion as yet, apart from the facts it works. I'm going to leave ADA in place and do some rolling on the headphone output - LMH6643, LME49720, AD8599 and AD8620.

 

EDIT: after 2 hours of constant listening to my favourites tracks decided to keep the DAP like it is now, with ADA4841-2 and LMH6643. The sound blew my mind, the level of details, clarity and dynamics is just right. No more rolling for now ;)


Edited by docentore - 11/1/13 at 10:55am
post #153 of 207

​​Dear friends,

Could anyone send me HiRes photo of Fiio X3 board with removed (unsolder) Wm8740 DAC chip

which would have been clearly visible line contacts under the chip?
I casually damaged a few contacts under the chip
and now it's difficult to restore themwithout a photo :(
I will be very grateful to you for your help!!!!
Thank you!!

my email: discostyle@gmail.com

post #154 of 207

modded it with the muses 8820 just now, and it works :D

 

unfortunately i don't have another x3 with me so i can't really test whether it was for the better or worst :x

 

it stills sounds great to me though.

 

the 2 caps at the side was PITA and not soldering anything for months was making things very hard.


Edited by chesterqw - 11/11/13 at 2:47am
post #155 of 207

sorry, I am not very clear with this mod, just give me answer for this silly question.
I thought AD8397 is an opamp with gain (amplifier), and after ask to my google, I found wolfson wm8740 follow by lowpass filter, so which one in this X3 design? 
If I have to mod this X3, I would go to replace the lowpass filter opamp, rather than amplifier opamp.    

 

 

post #156 of 207
The X3 doesnt have Low pass filter.
post #157 of 207

I mean, differential to single ended opamp. 

post #158 of 207

just replaced the AD8397 to AD8620, but the sound change is not found.
headphone DT 770 Pro 80 ohm
perhaps only the amount of bass was slightly less

post #159 of 207
Quote:
Originally Posted by SergBill View Post
 

just replaced the AD8397 to AD8620, but the sound change is not found.
headphone DT 770 Pro 80 ohm
perhaps only the amount of bass was slightly less

i would say that it does exactly what it should then?

post #160 of 207

I'm not sure. i have no x3 else to compare

post #161 of 207

LT1886 is better for low-resistance headphones. I recommend, very good result.

 

post #162 of 207

lt1886 is very good for low-impedance headphones, I recommend.

post #163 of 207

I havent read the whole tread, but where can I get the OPA2229? The only thing I can find that comes close to the Number is OPA228 or 2227?

I would like some more clarity and maybe less bass, but dont like anything to become sharp or harsh! :)

post #164 of 207
Thread Starter 

It is OPA2209. OPA2229 is just a typo, sorry.

post #165 of 207

I really want to thank you so much.

 

I ordered an O2 amp from Epiphany acoustics that arrived on New Years's Eve. I bought the connecting cable yesterday and hooked it up and it has already improved my system. The Fiio X3 sounded good already; the new Fiio cables on my Shure SE215s made a big difference, but this amp has truly transformed my system from the first time I plugged it in.

 

Thanks for your great advice. It saved me a lot of time and made a huge difference for very little money

 

Thanks again

 

Cheers

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