SONY NW-WM1Z / WM1A
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Feb 3, 2017 at 10:21 PM Post #8,706 of 45,723
Man this dap is great. It's burning 21 hours nonstop but it isn't warm at all. It doesn't like my all opus1, dpx1, ak70, qp1r, they got really warm easily. And battery is awsome. Love it
biggrin.gif

perfect high-end portable solution indeed.
 
Feb 3, 2017 at 10:24 PM Post #8,707 of 45,723
Feb 3, 2017 at 10:24 PM Post #8,708 of 45,723
I don't even need to charge it using a plug.

I just connect it to my com and insert songs and tidy up my folders and plug out, it last hours. It's like so convenient.
 
Feb 3, 2017 at 10:37 PM Post #8,709 of 45,723
Feb 3, 2017 at 10:58 PM Post #8,711 of 45,723
What has this world come to when we discard measured data in favor of opinions?   :confused:   Well, here's some more data to ignore...

I just measured the output of the 1A and 1Z. They both measure exactly the same, BTW. All measurements are on the balanced jack using high gain with a 1Khz test tone. I don't have a QP1R here to test, so all I have to compare with is the manufacturers published specs.

Into 300 ohm load = 2.06 volts (14mW) A slight edge on the QP1R at 12mW (approximately 17% higher).
Into 32 ohm load = 2.02 volts (128mW) 3 times the QP1R's claimed output of 40mW.
Into 16 ohm load = 2.0 volts (250mw) The only posted dated for the QP1R into a 16 ohm load is 16.3mw (Wow!).

This data shows that the Sony and Questyle have a somewhat equal maximum voltage output, but the Sony is capable of delivering MUCH more current.


Didn't you get the memo? 2017 is the year of "alternate facts", so of course power measurements SUPPLIED BY THE MANUFACTURER is not a true representation of output power, also something something fake news.

it's embarrassing when someone copy and paste the marketing material without understanding the difference. All a current mode amp does is that it holds current constant while varying voltage for power output, whereas traditional voltage amps is the other way around, holding voltage constant while varying current. Simple science and engineering fact. In the end the final maximum output power doesn't care whether you are varying current or voltage, so when the OEM says it's X mW, that's as final as it gets. And here the WM1 trounces on the QP1R.

It appears that gears wants to argue sonic characteristics but thinly mask it with stuff he is passing off as objectivity - and that is wrong because sonic characteristics like cold/warm etc are a pure subjective preference, not objective fact.
 
Feb 3, 2017 at 11:03 PM Post #8,712 of 45,723

 

 
 
 
Comparison for someone who is interested. If you are so sure on measurement numbers, don't bother.
QP1R beats 1Z on balance mode by a small margin in term of driving power.
Credits: @rudi0504 
 
Feb 3, 2017 at 11:12 PM Post #8,713 of 45,723
  Well how come my vegas is less bass than usual when i pair it with 1A ? i don't know that did i do something wrong in settings or not lolz.

 
Burn in.
 
Up the volume.
 
Try high gain.
 
Use a 4.4mm balanced cable.
 
Feb 3, 2017 at 11:19 PM Post #8,714 of 45,723
 
 
 
 
Comparison for someone who is interested. If you are so sure on measurement numbers, don't bother.
QP1R beats 1Z on balance mode by a small margin in term of driving power.
Credits: @rudi0504 

 
Looks like it's just a small margin. 
 
It's not like heaven and hell of a difference.
 
So there is nothing to fight about. Chill guys.
 
Feb 3, 2017 at 11:21 PM Post #8,715 of 45,723
   
Looks like it's just a small margin. 
 
It's not like heaven and hell of a difference.
 
So there is nothing to fight about. Chill guys.

I'm cool from beginning that qp1r is more powerful than 1z in reality. Not just "Being trounced" 
 
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