[musicheaven]

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.

 

[musicheaven]

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.

 

[tak-]

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.

 

[doki81]

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

 

[BucketInABucket]

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

 

[lin0003]

100? 
I listen at 165 usually on a pair of pretty efficient IEMs. 

 

[musicheaven]

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

 

[H20Fidelity]

  100? 
I listen at 165 usually on a pair of pretty efficient IEMs. 

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

 

[lin0003]

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

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

 

[H20Fidelity]

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

 



 

Spoiler: Warning: Spoiler!

About 175-190. 

 

[tak-]

140

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

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.

 

[dryvadeum]

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

 

[H20Fidelity]

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

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

 

[Sorensiim]

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. 

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. 

 

[nihontoman]

   
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