[theosteopath]

Was really hoping to have my '90 before I travel next Friday- but it's not looking good.
-Andy

 

[SilverEars]

Does the Chinese website have measurements of the AK120 or the 240? Or the HM-901? I'm curious how they measure.  
 
Are there any other websites have AK or 901 measurements if not?

 

[Solude]

  I think Chinese guy is measuring the maximum voltage and power output that hits the THD 1% mark, not what maximum it's capable of.

 
Academic.  They are all solid state.  When you hit that 1% mark distortion tends to already be vertical and clipping hard.

 

[Sakadagami]

Just received an email from iBasso. They say that they'll provide the tracking number tomorrow.
I ordered the DX90 on 7th. To Spain.

 

[yiokuan]

This is my first post and reply from iBasso.

Hi,
Thank you for your email.
Our courier has picked up your shipment. We will provide the tracking number tomorrow.

Best Regards,
iBasso Audio

 

[SilverEars]

   
Academic.  They are all solid state.  When you hit that 1% mark distortion tends to already be vertical and clipping hard.

Gotcha, so for SS, distortion just hits off at a certain voltage.  Sounds like distortion is at the mark of maximum swing at the output for given load value.
 
This is good stuff, which means if distortion goes up significantly at certain point, it's audible without a doubt and it is the maximum voltage output.
 
Can you link me where you got this?

 

[Jazzyfi]

OK, thanks guys. Let's see if we will get a tracking number tomorrow.

 

[goodvibes]

  Please....
 
http://www.wired.com/2013/11/tnhyui-earphone-burn-in/

Because measurements are more important than music?

 

[SilverEars]

So this means, that the Chinese guys measurements were basically max output voltages at 32 ohms.  X3 and X5 is outputs more, we know that for sure.
 
So for SS, 1% THD is where it would clip and therefore maximum.
 
Also, this means maximum varies per load value.  Edit: But not the output voltage for DX90 since it has such a low output impedance.

 

[goodvibes]

If that is true, then it renders the high gain on DX90 useless.

Not really. Into high impedances, it may be required to get max output. Basically, max volume into 600 ohms may not induce clipping at less than high gain. More V and lees current is needed.

 

[goodvibes]

   
Academic.  They are all solid state.  When you hit that 1% mark distortion tends to already be vertical and clipping hard.

This

 

[mowglycdb]

Clipping = distortion?
 
I've used the LCD-3 and DX50 atleast to 2.5V and I don't hear clipping (supposely the DX50 reaches THD+N at 1.6V ) I feel that I'm listening to noise more than music.

 

[SilverEars]

Just to add, maximum voltage varying per load should not be much since DX90 has such a low output impedance.  For example, if you have a high output impedance and you use a low impedance headphones, you will get much less voltage than much greater impedance headphones.
 
Also the high output impedance lower the power output to the load.
 
Also for those folks with BA iems or customs with multiple BA drivers.  Keep in mind of the crossovers, which the high output impedance would affect since crossovers have resistors in them.  this will change the filter, and mess up what frequency range each driver would output.  Moral of the story is, DX90 has very small output impedance, so it's good for multiple BA iems.

 

[Solude]

High gain is always useless for modern pop recordings.  Where it is useful is for music/media with a low average level and momentary spikes like classical.  That and for people who like to have the impression that because the volume is set a small number that there is huge headroom remaining /facepalm

 

[Solude]

  I've used the LCD-3 and DX50 atleast to 2.5V and I don't hear clipping (supposely the DX50 reaches THD+N at 1.6V ) I feel that I'm listening to noise more than music.

 
That's 110dB by the way