[miceblue]

Looks like the Pulse Xfint is now officially called the Pulse X infinite (i = internal op-amp upgrade, f = femto clock, n = naked resistor, t = THD).
http://www.lhlabs.com/force/indiegogogeekpulse/2797-geek-pulse-xfi-signature-edition-details?start=800#48797
[quote="Larry Ho" post=48797] Hi, everyone

Thanks for your support. For the people who back both THD and NR perk, we decide to make it even better. And again, it is FREE. And we decide to call this version 'Geek Pulse X infinite' ... Here is what it will have.

* Current to Voltage section right after DAC IC. We will use Texas Component's Z-Foil "Naked" resistors two pairs.
* Also by hand matching, we expect to lower the THD at least -3dB if not more.
* We will use Vishay's 0.01% MELF resistors (which I only saw that twice in some >$15K Pre-amp) in your line-out analog stage. Again two pairs.

Let me post two screen captures here...

Enjoy!

Happy New Year![/quote]



Texas Corporation TX2575 information:
Prices: http://webdirect.texascomponents.com/searchresults.asp?cat=1821
Data sheet: http://www.texascomponents.com/pdf/tx2575.pdf

Vishay UMA 0204/UMB 0207 information:
Prices (you have to send a request for a quote): http://www.vishay.com/product?docid=28715
Prices from Mouser: http://www.mouser.com/ProductDetail/Vishay-Beyschlag/UMA02040G1001HAU00/?qs=sGAEpiMZZMsU0eETUM64J%252btsDIlfFjA47gThFcEhjwI%3d
Data sheet: http://www.vishay.com/docs/28715/umx020x.pdf

 

[digitalzed]

^^Thanks Larry!!^^

 

[miceblue]

And to stay on topic with the discussion of the different filters, I just saw this today:
http://lhlabs.com/force/geekpulse/2736-few-additional-features-for-you-to-explore

Hi, Force

Here is the 'wish' list from you that we decided to put in your current Geek Pulse, Geek Pulse X/S...

1. Apple Remote Pairing: So your Apple remote could have an one to one match to your Pulse.
2. 192K PCM over TOSLINK (optical): There are very few devices use this mode and it is kinda of 'over the specs'... but we did it. So you could play with it.
3. TCM and FRM: Geek Pulse' TCM and FRM is slightly better than Geek Out's. And I plan to add two more via firmware updates.
4. There should be slightly different sound characteristics when you set headphone gain to HIGH and LOW. Not only the volume difference.

Cheers,

Larry

I really don't like how information is scattered everywhere throughout the LH forums...

 

[dclaz]

And to stay on topic with the discussion of the different filters, I just saw this today:
http://lhlabs.com/force/geekpulse/2736-few-additional-features-for-you-to-explore
I really don't like how information is scattered everywhere throughout the LH forums...

4. There should be slightly different sound characteristics when you set headphone gain to HIGH and LOW. Not only the volume difference.

Point 4 is a bit curious. 'Should' be? Surely not be desire?

 

[Chikolad]

  Point 4 is a bit curious. 'Should' be? Surely not be desire?

 
I agree. First thing that crossed my mind when I read it was "why the hell?!".
But it seems that they did it on purpose for some strange reason.

 

[Ultimate Mango]

How will the people who did the 'moving on up' perk know that their order has been modified? I did my survey months ago and upgraded last week...

 

[greenkiwi]

How will the people who did the 'moving on up' perk know that their order has been modified? I did my survey months ago and upgraded last week...

I'm wondering the same thing.

Do we all need to go file support tickets?

 

[Larry Ho]

   
I agree. First thing that crossed my mind when I read it was "why the hell?!".
But it seems that they did it on purpose for some strange reason.

 
Well... the reason is simple and straight forward ---
 
Gain setting HIGH: Means you need more 'power' and punch for your headphone. I pick the right passive resistors to fit this requirement.
Gain setting LOW: You are using high efficiency IEMs.  I pick the super quiet ultra low noise components associate with it.
 
It's all about details.

 

[Larry Ho]

  Point 4 is a bit curious. 'Should' be? Surely not be desire?

Because we have relay array there for switching different GAIN. So I could pick the good passive components for different gain settings. 

 

[Chikolad]

   
Well... the reason is simple and straight forward ---
 
Gain setting HIGH: Means you need more 'power' and punch for your headphone. I pick the right passive resistors to fit this requirement.
Gain setting LOW: You are using high efficiency IEMs.  I pick the super quiet ultra low noise components associate with it.
 
It's all about details.

 
Thanks for the clarification. I thought the purpose was to actually change the sound characteristics. If it's a matter of noise that makes more sense

 

[bitsnbytes]

Looks like the Pulse Xfint is now officially called the Pulse X infinite (i = internal op-amp upgrade, f = femto clock, n = naked resistor, t = THD).
http://www.lhlabs.com/force/indiegogogeekpulse/2797-geek-pulse-xfi-signature-edition-details?start=800#48797
Texas Corporation TX2575 information:
Prices: http://webdirect.texascomponents.com/searchresults.asp?cat=1821
Data sheet: http://www.texascomponents.com/pdf/tx2575.pdf

Vishay UMA 0204/UMB 0207 information:
Prices (you have to send a request for a quote): http://www.vishay.com/product?docid=28715
Prices from Mouser: http://www.mouser.com/ProductDetail/Vishay-Beyschlag/UMA02040G1001HAU00/?qs=sGAEpiMZZMsU0eETUM64J%252btsDIlfFjA47gThFcEhjwI%3d
Data sheet: http://www.vishay.com/docs/28715/umx020x.pdf

I still like Pulse Xfitr or Xfint

To infinity and beyond!

 

[Levanter]

Interest check, anyone wants a brand new Lightspeed 2G USB cable for less than $200? Shipping and paypal fees not included.

 

[Boban85]

Interest check, anyone wants a brand new Lightspeed 2G USB cable for less than $200? Shipping and paypal fees not included.

 
I think all of us here have two of those already Cheers! 

 

[Chefano]

Everyone who upgraded the Xfi must open a support ticket?

 

[pedalhead]

I see the THD + Naked resistor upgrade is about to be re-released.  Hmmm, I've sat it out this far, but getting tempted...particularly if the 2G cable is still included as a sweetener.  I'll admit I'm well into "might not hear a difference" territory, but there's more than a small element of just wanting the top model (other than the bonkers SE) in order to eliminate future doubt.  I wonder if this'll delay shipment of my unit beyond April when the UK meet I'm organising happens.  Hmmmm.....