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DX90. 2X Sabre,1st page: Downloads, info&inst. . ! Lurker0 FW Mod link 1st page !!. .NEW FW! 2.3.0 . . . . . - Page 294

post #4396 of 13841

I didn't get a charger from ProStudio, I just got the digital adapter and the cable. Too bad it's an audio cable but I already have several digital cables. Still don't know what that adapter cable is with the 1/8-inch stereo plug on one end and a sort of square thing on the other.

post #4397 of 13841
Quote:
Originally Posted by IH8RDNX View Post
 

I didn't get a charger from ProStudio, I just got the digital adapter and the cable. Too bad it's an audio cable but I already have several digital cables. Still don't know what that adapter cable is with the 1/8-inch stereo plug on one end and a sort of square thing on the other.

That's the burn-in cable if you want to burn in your DX90 without actually a headphone. (why I have no idea.)

post #4398 of 13841
Thread Starter 
Quote:
Originally Posted by DrSheep View Post
 

That's the burn-in cable if you want to burn in your DX90 without actually a headphone. (why I have no idea.)

Why to burn in or why to use the resistor network? 

 

I think the included resistor for burn in is a great idea. If you like to burn in, which I do, no headphones are plugged in and I can just let it go while forming the capacitors and doing whatever else burning in does. I hear and have heard changes. Some hear a difference some don't Nice addition though, IMO. 

post #4399 of 13841

If the DX90 requires burn-in, it does not seem to exhibit the symptoms of other components during their burn-in, such as harshness and/or frequency imbalance. Looking forward to hearing the fully burned-in version.

post #4400 of 13841
Quote:
Originally Posted by jamato8 View Post
 

Why to burn in or why to use the resistor network? 

 

I think the included resistor for burn in is a great idea. If you like to burn in, which I do, no headphones are plugged in and I can just let it go while forming the capacitors and doing whatever else burning in does. I hear and have heard changes. Some hear a difference some don't Nice addition though, IMO. 

 

 

Quote:
Originally Posted by IH8RDNX View Post
 

If the DX90 requires burn-in, it does not seem to exhibit the symptoms of other components during their burn-in, such as harshness and/or frequency imbalance. Looking forward to hearing the fully burned-in version.

 

So far I haven't noticed any changes after listening to it for a while.  BTW, the DX90 sounds like a more refine version of the AudioQuest DragonFly, which also uses an unspecified version of the ESS Sabre DAC.

post #4401 of 13841
Quote:
Originally Posted by drgajet View Post

Thanks nc8000, that means there's hope for those albums. Now, how do I do that? In mp3tag, or some other way? PM if necessary.

Jim

Yep, you use mp3tag
post #4402 of 13841
Quote:
Originally Posted by headwhacker View Post

Quote:
Originally Posted by philiptw View Post

 
Just saw the DT880 600ohm going for a good price on the web... Can the Dx90 drive them adequately? If someone can kindly give me its pros and cons I would really appreciate it..

A few days in and the K545 somewhat cannot satisfy me like it did T_T 
dont know what's happened... 

DT880 @ 600Ohms is a bit more sensitive (96 dBSPL/mW) than K545 @ 32Ohms (97 dBSPL/V)

To hit the 110 dB peak which is lough enough for most recordings (Pop, rock) K545 needs 4.4 Vrms and DT880 needs 3.8 Vrms. DX90 as per specs can only put out 2.8Vrms @ high gain. DT880 can sound louder than K545 but still not enough.

I don't speak electrical engineering, so I'll just take your word on that wink.gif

I just tried it and have to say it doesn't really drive 880/600s to satisfaction.
post #4403 of 13841
Quote:
Originally Posted by headwhacker View Post
 

 

DT880 @ 600Ohms is a bit more sensitive (96 dBSPL/mW) than K545 @ 32Ohms (97 dBSPL/V)

 

To hit the 110 dB peak which is lough enough for most recordings (Pop, rock) K545 needs 4.4 Vrms and DT880 needs 3.8 Vrms. DX90 as per specs can only put out 2.8Vrms @ high gain. DT880 can sound louder than K545 but still not enough.

The first value is efficiency, and the second is sensitivity.  Completely different types of values.  Not comparable values.

post #4404 of 13841
Quote:
Originally Posted by SilverEars View Post

The first value is efficiency, and the second is sensitivity.  Completely different types of values.  Not comparable values.

 



Sure they are different values but they are related. You can extract 1 value from the other. The more sensitive the headphone the more efficient it is. So how is it not comparable?
post #4405 of 13841
Quote:
Originally Posted by headwhacker View Post
 
Quote:
Originally Posted by SilverEars View Post
 

The first value is efficiency, and the second is sensitivity.  Completely different types of values.  Not comparable values.

 



Sure they are different values but they are related. You can extract 1 value from the other. The more sensitive the headphone the more efficient it is. So how is it not comparable?

mW is power input.  V is voltage input.  Power depends on two of the three variables(V,I,R), and then there is only voltage dependency for sensitivity.  One maybe more efficient than the other, but not necessarily more sensitive while at it.  


Edited by SilverEars - 4/30/14 at 8:53pm
post #4406 of 13841
Quote:
Originally Posted by SilverEars View Post

mW is power input.  V is voltage input.  Power depends on two of the three variables(V,I,R), and then there is only voltage dependency for sensitivity.  One maybe more efficient than the other, but not necessarily more sensitive while at it.  

 



Ok this is becoming a sound science topic but is a very basic one. V, I, R are all involve but you only need to get 2 values of any combination of the 3 to compute for power. These are not absolute values because there are other factors involve (e.g. cuurent limiter circuit etc) but the headphone sensitivity/efficient spec are nominal values and they are good enough as a general guide.

To make things simple:

96dbSPL/mW headphone definitely will play louder than a 97 dbSPL/V all things equal. If you don't agree the best thing to prove it is get the 2 exact headphones in question K545 and DT880 and see which one sounds louder.
post #4407 of 13841
Quote:
Originally Posted by DrSheep View Post
 

 

 

 

So far I haven't noticed any changes after listening to it for a while.  BTW, the DX90 sounds like a more refine version of the AudioQuest DragonFly, which also uses an unspecified version of the ESS Sabre DAC.

I got a chance to hear a brand new set of DX90 comparing with my set burn in abt 100 hrs.. there is a different how great u have to hear it yrself.... the burn in unit is more refined, less bright, bass is better controlled. Everything is less harsh. Somehow soundstage is narrower..

post #4408 of 13841
What's the easiest way to restore the default wallpaper? I haven't started messing with mine yet, but I always like to have an exit strategy for when I inevitably end up somewhere I regret.

Thanks.
post #4409 of 13841
I took a different approach to buying a spare battery, although costlier. When the DX90 runs out, I have to switch to an X5. When the X5 runs out I switch back to the DX90. Such a tough life☺ But each time I pick up either unit, I enjoy changing.
post #4410 of 13841
Quote:
Originally Posted by Pudu View Post

What's the easiest way to restore the default wallpaper? I haven't started messing with mine yet, but I always like to have an exit strategy for when I inevitably end up somewhere I regret.

Thanks.

Simply take out from the DX90 the "wallpaper.png" you put on the internal memory in order to get a custom wallpaper in the first place :smile:

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