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Sony PHA-1 portable DAC/amp - Page 36

post #526 of 533
Could there be an issue with the output impedance of the headphone output (vs. line out)?

I presume I should run the amp on low gain and turn the volume control as high as possible to replicate a true line out. What would be the output voltage at "max" on low gain?

I may try this with my BL-2 and / or TU-HP01 tonight (yes, I like portable tube hybrids).
post #527 of 533

Don't do this as you will run into distortions, rather you should use high gain for sudo line out.  The impedance matching thing is more of a suggestion than a rule.

post #528 of 533

yeah, DrSheep is right.

 

If you add the gain to max there will be distortion... If you want to simulate a line out you will have to find the sweet spot of the PHA-1. 

 

This thing on Max will be way more powerful than a normal line out, and it will distort like a f***. The input if your device can only handle so much power coming in... 

 

There are 2 ways you can go about doing this, the easy one and the cool one...

 

- The easy would be just plug it in and check at what volume there will be no distortion, good tone and good volume...

 

- The cool one would be to find a sample of white or pink noise (so there is a constant signal, no drums beats and dB flactuation), play that back in your PHA-1. Get a voltmeter and find at what volume it will deliver 1V. As line output is around that range. 

 

(I just love excuses to use my electrical toys!!! :biggrin:)

post #529 of 533

Shame it doesn't have line-out like the PHA-2.
I'm personally looking for some deals on the PHA-3 just for the 30hour amp time.

Any idea if we could open the PHA-1 and upgrade the battery?


Edited by Mickice - 10/29/14 at 5:26am
post #530 of 533
Quote:
Originally Posted by Mickice View Post
 

Shame it doesn't have line-out like the PHA-2.
I'm personally looking for some deals on the PHA-3 just for the 30hour amp time. 


any words on how much this will hurt the wallet yet?

 

Also, i don't mind the 5hours battery time. I have to charger my iPhone and iPad every day anyway... 

post #531 of 533
Quote:
Originally Posted by LeoTheAwesome View Post
 


any words on how much this will hurt the wallet yet?

 

Also, i don't mind the 5hours battery time. I have to charger my iPhone and iPad every day anyway... 

Well, I can find the PHA-2 with the line out option which is likely an asian model for $480au. 
PHA-3 looks around $800au+


Edited by Mickice - 10/29/14 at 5:34am
post #532 of 533
Quote:
Originally Posted by Mickice View Post
 

Well, I can find the PHA-2 with the line out option which is likely an asian model for $480au. 
PHA-3 looks around $800au+


ouch... One day... not just yet... 

post #533 of 533
Quote:
Originally Posted by LeoTheAwesome View Post

yeah, DrSheep is right.



 



If you add the gain to max there will be distortion... If you want to simulate a line out you will have to find the sweet spot of the PHA-1. 



 



This thing on Max will be way more powerful than a normal line out, and it will distort like a f***. The input if your device can only handle so much power coming in... 



 



There are 2 ways you can go about doing this, the easy one and the cool one...



 



- The easy would be just plug it in and check at what volume there will be no distortion, good tone and good volume...



 



- The cool one would be to find a sample of white or pink noise (so there is a constant signal, no drums beats and dB flactuation), play that back in your PHA-1. Get a voltmeter and find at what volume it will deliver 1V. As line output is around that range. 



 



(I just love excuses to use my electrical toys!!! " src="http://files.head-fi.org/images/smilies/biggrin.gif" />)


 



I should use low gain rather than high though, shouldn't I (less noise)?
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