or Connect
Head-Fi.org › Forums › Equipment Forums › Headphone Amps (full-size) › Official Audio-gd Sparrow thread
New Posts  All Forums:Forum Nav:

Official Audio-gd Sparrow thread - Page 34

post #496 of 725

Kingwa says (lol should reminded him to type in chinese) "Yes. Only solder a point. The wire is come with the WM8741 module."  Guess it's a done deal for me to get the old sparrow and upgrade myself!  It'll be cheaper and faster haha.

post #497 of 725

ha!  if I had known it was this easy, I wouldn't have sold the sparrow B!  (is it $30 with shipping?  wow, shipping alone is usually $30+)  At least now I'll get to see what the unity gain and A-level components do.  (hopefully something)

 

post #498 of 725

I got $44USD shipped to Canada, so might be cheaper for you guys down south.  Btw, what is this "unity gain"?

post #499 of 725
Quote:
Originally Posted by mythless View Post

I got $44USD shipped to Canada, so might be cheaper for you guys down south.  Btw, what is this "unity gain"?


Just a fancy term for +0.

post #500 of 725

The 8741 needs more power than the 8740 (according to Kingwa) and must not work with the 1852 because of it?

post #501 of 725
Quote:
Originally Posted by tim3320070 View Post

The 8741 needs more power than the 8740 (according to Kingwa) and must not work with the 1852 because of it?



Does it need more or "different " voltage.

 

If you look at the PIC in this post of the DAC module, it shows there are no 5 v pins on the module like there is on the 8740.  It picks up 3.3v rather than 5 v.

 

http://www.head-fi.org/forum/thread/483188/official-audio-gd-sparrow-thread/480#post_6864314

 

See what I'm talking about here?

 

On the 1852 and 8740,that I have, there are pins down to pick up the 5v off the "Motherboard".  On the 8741, there are no 5v pins, and it picks up 3.3v off the DIR board.

post #502 of 725

Out of pure laziness I just stated that it needs more power. But the above is correct :)

 

Now that I think about it... that would make the new version A's that come with the wm8741 not backwards compatible?


Edited by muad - 8/19/10 at 10:41am
post #503 of 725

Only if Kingwa changed the power plan for the WM8741.  I would guess as long as the new A version doesn't have that extra wire it wouldn't be backwards compatible to the WM8740.  But if it does, it should be.   Unless you're refering to the other DAC module.

post #504 of 725

I think I read that the new version A won't have the wire... don't quote me on it though

 

but really there shouldn't be a reason why someone would want to move from the 8741 to the 8740 or 1852 modules. Unless they need the latter for a deliberate emphasis to the upper mids...


Edited by muad - 8/19/10 at 11:03am
post #505 of 725

Quote from Kingwa on the two chips: "WM8741, but its power spend is 3X than WM8740"

post #506 of 725

lol requires 3 times more voltage?

 

lol anyways as long as I can do the upgrade im perfectly content.

post #507 of 725
Quote:
Originally Posted by mythless View Post

lol requires 3 times more voltage?

 

lol anyways as long as I can do the upgrade im perfectly content.



I imagine it's more current and not more Voltage.

post #508 of 725

Kinda weird tho... the wm8470 has 2 pins that take 5v each from separate supplies.  The new wm8741 is missing those 2 pins. Instead those two connections are bridged together and take 3.3v together from the dir9001 module. This is considering the labels on the motherboard are correct. Im thoroughly confused.. but I guess it doesn't really matter.

 

EDIT: IC, what les Garten says makes more sense :)


Edited by muad - 8/19/10 at 5:56pm
post #509 of 725

Yeah definitely, lol i was thinking "wow I didn't know that module was so power hungry!" but current makes way more sense.

post #510 of 725

Les is correct...the wm 8740 requires 19mA (typical at 3.3V) vs 40mA (typical at 3.3V) for the wm 8741 according to their respective data sheets. Max V for the 8741 (digital PSU connections) is 4.5V but optimum V is 3.3.

 

Peete.


Edited by Pricklely Peete - 8/19/10 at 8:12pm
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Headphone Amps (full-size)
Head-Fi.org › Forums › Equipment Forums › Headphone Amps (full-size) › Official Audio-gd Sparrow thread