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The iBasso DX50 Thread - Latest firmware: 1.9.4 - January 24, 2016 - Page 148

post #2206 of 18426
Thread Starter 
Quote:
Originally Posted by dryvadeum View Post

So I got my DX50 but Ive noticed theres a dead pixel on the bottom right of the screen. Anyone else have this issue?

I did too but I noticed when I shutdown and restart it disappeared. It looks like the graphics painting routine. Initially I also concluded it had dead pixels and was ready to return it but after few reboots it cleared out. Do a few reboots and if it is still there then drop the towel and decide if it's worth returning it.

Edit: see when you restart the unit, the initial screen logo has a semi dark background, if the dead pixel still shows up then it's really dead. Mine does not.
Edited by musicheaven - 9/19/13 at 11:43pm
post #2207 of 18426
Thread Starter 
Quote:
Originally Posted by MusicFiMan View Post

Hi Friends!
I have ordered the Dx50 last night!
I haven't received any email notification form ibosso regarding my purchase but only from Paypal.
Is this normal? are they sending mail only when the item was shipped (meaning on the 27th, 4th Batch) ?

Yes I had to ask them. On the 24th, 25th you can shoot them an email to ask them for the courier and tracking number. wink.gif
Edited by musicheaven - 9/19/13 at 11:32pm
post #2208 of 18426
Quote:
Originally Posted by sensui123 View Post

with the TG334 and the Heir 4ai I've tested thus far (haven't gotten to my other IEMs yet) you can hear a very slight hiss.  No need to crank up the volume to anything insane, around 160+ would make the hiss audible.....I really hate calling it a hiss because it's not a sssssssssssssss sound per say.....nor is it really a humm since it's not a mmmmmmmmmmmmmmmmmmmmmmm sound either.....it's just static white noise......very faint.  Once again, when any music is playing (all genres I've tried), I cannot hear it, it's only when the player is not playing any tracks or a silent bit on a track (very rare with the music I listen to in the first place).  Nothing that takes away from the unit for sure.

IEM: Reshelled DBA02
Gain: All levels
Volume: 0-255
Observation: Consistent level of background noise. Does not fluctuate with volume and is present music off. Contrary to certain beliefs, this background noise is especially obvious when playing songs at low volume (e.g. 100 on low gain). Still obvious even when playing at 170 on low gain, which is uncomfortably loud for me. At approximately the same music loudness, this background noise is less obvious on mid and high gain, but still detectable especially in a quiet listening environment.
post #2209 of 18426
Quote:
Originally Posted by tak- View Post


IEM: Reshelled DBA02
Gain: All levels
Volume: 0-255
Observation: Consistent level of background noise. Does not fluctuate with volume and is present music off. Contrary to certain beliefs, this background noise is especially obvious when playing songs at low volume (e.g. 100 on low gain). Still obvious even when playing at 170 on low gain, which is uncomfortably loud for me. At approximately the same music loudness, this background noise is less obvious on mid and high gain, but still detectable especially in a quiet listening environment.

 

at vol 100? what song are you listening?? i have to listen to my music at 200 at least :(

post #2210 of 18426

I'd hazard a guess and say a really efficient pair of IEMs :P

post #2211 of 18426

100? 

I listen at 165 usually on a pair of pretty efficient IEMs. 

post #2212 of 18426
Thread Starter 
At 100 I need to be in a real quiet room to hear anything, efficient iems they must be maybe with internal amplifier biggrin.gif
post #2213 of 18426
Quote:
Originally Posted by lin0003 View Post
 

100? 

I listen at 165 usually on a pair of pretty efficient IEMs. 

 

250 is my average, don't go much lower. 

post #2214 of 18426
Quote:
Originally Posted by H20Fidelity View Post
 

 

250 is my average, don't go much lower. 

 

Wow, that's very loud! You should be careful that that volume is safe...

post #2215 of 18426
Quote:
Originally Posted by lin0003 View Post
 

 

Wow, that's very loud! You should be careful that that volume is safe...

 



 

Warning: Spoiler! (Click to show)
About 175-190. 
post #2216 of 18426
140
Quote:
Originally Posted by musicheaven View Post

At 100 I need to be in a real quiet room to hear anything, efficient iems they must be maybe with internal amplifier biggrin.gif

I used 100/low gain as an example (: an enjoyable and still comfortable volume for me is 145-150 on low gain. Any louder and I find it uncomfortably loud after a few songs. But because of the background noise, I usually 130-135 on mid gain.

I suspect the noise is caused by the amp... the noise doesn't appear immediately after turning the DX50 on. It comes on when the media scanning is almost completed.
Edited by tak- - 9/20/13 at 12:42am
post #2217 of 18426
Does anyone else notice their DX50 clicks when powering on and off?
post #2218 of 18426
Quote:
Originally Posted by dryvadeum View Post

Does anyone else notice their DX50 clicks when powering on and off?

 

Yes, to my understanding it's the amp section turning on & off.

post #2219 of 18426
Quote:
Originally Posted by kkcc View Post


As long as there is no or minimal degradation in the signal quality I would actually rather have variable LO.

Case in point I tried to paired my hm901 LO with the Dynaudio xeo3 but unfortunately the LO level is too high and resulted in clippings. With DX50 I can adjust it.

 

The variable LO is due to the fact that volume is controlled digitally, straight on the DAC chip (like on the DX100). This gives you very precise control, no channel imbalance issues and the amp stage can be kept at a constant level, not having to worry about analog pots causing noise or crackling. 

Quote:
Originally Posted by dryvadeum View Post

Does anyone else notice their DX50 clicks when powering on and off?

Yep, mine clicks as well. 

 

Regarding hiss: I think we need to agree on a definition here. In a quiet room, with no music playing, I can tell the difference between the player being on or off - using iems, and I have to listen for it. The "sound" is constant, regardless of volume and gain setting. It's not a hiss or a hum, more like insanely low volume white noise. When I talk about "hiss", I'm talking about a constant "SSSSSS" noise like the Studio V (not 3rd ani and all that) with iems. I can produce "hiss" like that on the DX50 if I use sensitive iems and turn the volume past 240, while playing the "silence" track. If I played real music at those levels I would most definitely damage my hearing and probably my headphones as well. 

post #2220 of 18426
Quote:
Originally Posted by Sorensiim View Post
 

 

The variable LO is due to the fact that volume is controlled digitally, straight on the DAC chip (like on the DX100). This gives you very precise control, no channel imbalance issues and the amp stage can be kept at a constant level, not having to worry about analog pots causing noise or crackling.

Yep, mine clicks as well.

 

Regarding hiss: I think we need to agree on a definition here. In a quiet room, with no music playing, I can tell the difference between the player being on or off - using iems, and I have to listen for it. The "sound" is constant, regardless of volume and gain setting. It's not a hiss or a hum, more like insanely low volume white noise. When I talk about "hiss", I'm talking about a constant "SSSSSS" noise like the Studio V (not 3rd ani and all that) with iems. I can produce "hiss" like that on the DX50 if I use sensitive iems and turn the volume past 240, while playing the "silence" track. If I played real music at those levels I would most definitely damage my hearing and probably my headphones as well.

 

thanks for clarification. Maybe some people here think that there should be no noise whatsoever (which is impossible to do) but if at maximum comfortable level of listening volume you have to strain your ears to hear it in a quiet room, then it's good to go :D

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