[cel4145]

You are correct, but for some reason a lot of people are complaining that they don't play nice with the DX50.  I found several posts where people were saying the same thing.  Just do a search in this thread for RE-400, and see what people have to say.

Well, that's because people are misreading the graphs if they are saying those measurements are the reason. Here are the specs for the RE-400:

Sensitivity: 102dB/1mW
Rated power: 10mW
Maximum power: 30 mW

Assuming that they are accurate specs, it would only take 8mw to reach 111 db. That means if you are listening to them at a little over 100 db average--which is very loud--you still have 10 db of dynamic headroom. 8 mw is below the max output of the DX50 amp according to those measurements where you would have to worry about how the different max output varies with impedance.

So look elsewhere for the reason people don't like the RE-400 with the DX50. Could be that they just don't care for the synergy of the DX50 sound signature in comparison to other amps that they have heard. Or could be that they have convinced themselves that there is a problem because they heard about those measurements, when there's not one

 

[WeirdG]

Well, that's because people are misreading the graphs if they are saying those measurements are the reason. Here are the specs for the RE-400:

Sensitivity: 102dB/1mW
Rated power: 10mW
Maximum power: 30 mW

Assuming that they are accurate specs, it would only take 8mw to reach 111 db. That means if you are listening to them at a little over 100 db average--which is very loud--you still have 10 db of dynamic headroom. 8 mw is below the max output of the DX50 amp according to those measurements where you would have to worry about how the different max output varies with impedance.

So look elsewhere for the reason people don't like the RE-400 with the DX50. Could be that they just don't care for the synergy of the DX50 sound signature in comparison to other amps that they have heard. Or could be that they have convinced themselves that there is a problem because they heard about those measurements, when there's not one

Thanks for breaking it down like that.  It makes a little more sense now.

 

[cel4145]

Thanks for breaking it down like that.  It makes a little more sense now.

Glad to help.

In case you are curious, the calculation is double the wattage for every +3db more output. So starting with

102 db/1w
105 db/2w
108 db/4w
111 db/8w

I know that's plenty of power for me, and then probably for many people. If you ever get a chance, use an SPL meter when listening to speakers to see different volumes (there are phone apps that can do this). It gives you more of a sense of how loud you need when it comes to amps. I think most people would be surprised that they often don't need as much power as they think. For example, THX studio reference volume for movies is 85db + 20 db of headroom, with speakers capable of 105 db peaks and subs 115db.

 

[Yanec]

  how different is the sound unlocked from the RB non-dual boot firmware? has anyone tried both to be able to compare? need your feedback please

These are just my own personal impressions:
 
Sound Unlocked is more dynamic and more lively but it has less neutral frequency response than the RockBox. It has more sibilant highs and a heavier bottom end, so basically a bit more "v-shaped"  a bit more lively and a bit more dynamic, thus it is less analytical and flat. I personally don't find the RB pleasurable no matter how analytical and neutral it is. SU has signature that is closer to the original FW, but still better than it in several aspects.

 
Cheers!

 

[Yanec]

  So after doing some research to figure out which IEMs to get for my DX50, I found some threads talking about how the DX50 doesn't work very well with low impedance headphones.  You basically need to use an amp with the DX50 for IEMs lower than 24 ohms.  Anything higher than 24 ohms should be sufficient, hence why my WooDuo2 IEMs(16 ohms) didn't sound great.  After scouring the threads, I found that a lot of people had great success pairing the VSonic VSD1/VSD1S IEMs with the DX50.  Many have said they're pretty much built for one another.
 
In any case, I ordered the VSD1S since the VSD1 are supposed to have a more bass.  http://www.lendmeurears.com/ has them both on sale for $38.40USD right now with free International shipping for anyone looking for IEMs to pair with their DX50.

Just as an illustration - I tried the DX50 with Creative EP-830 - 16 Ohm 103 dB. It sounded really loud and well. The 830's muddy bass became tighter the mids had great detail and warmth, the top end was not pleasurable as it was a bit harsh and sibilant. These budget 16 Ohm IEMs were louder than one can take for a longer period without visiting the doctor.
 
Cheers!

 

[polyrhythm]

  Decoders are written by iBasso engineers. Single decoder for FLAC, single for APE, DTS, etc.

 
 
Hi
 
So where does .wav fit in? With only Lossless enabled in the options on Sound Unlocked 1.2.1  .wav files do not play.
 
Could you add .wav to the lossless files able to be played?
 
Thanks

 

[zzvelik]

I updated to the latest firmware 1.5.0 yesterday and have been experiencing freezing problems when I play files off the microsd card past the 13 second mark. Files from the on-board flash memory play hassle free, so I'm wondering if my microsd card is corrupted or it's a firmware issue. I re-installed the firmware a few times as well as reformatted my microsd card and still keep getting this problem. I haven't tried flashing an older version of the firmware, but wondering if I'm the only person having this problem? TIA

 

[olddude]

Did you follow all installation instructions and remove Update.img after completing process and then run Factory Reset/Rescan Library?  

 

[zzvelik]

Yes, I removed the image file and did the factory reset. My computer reads the microsd fine, so I'm not sure why it's freezing up on the dx50. BTW, at first I attempted to load Rockbox on it, but couldn't get the toolbox to work, so I went with the 1.5.0 update afterwards.

Forgot to mention the following:

It also freezes near the end of the SD scan.
Freezes when I try to play 96khz .wma files from the SD card

 

[olddude]

Historically it will freeze at the end of a long scan.  Today for the first time mine didn't.
 
I don't use .wma.

 

[sludgeogre]

The more I read about these latest firmware issues, the more I'm like "I guess my iPhone with Spotify is good enough for now..."

 

[Jetblack08]

Which is better? DOC2008 Mega Sound Explosion or Sound Unlocked by Dimitriy? Sound Quality wise?

 

[cel4145]

The more I read about these latest firmware issues, the more I'm like "I guess my iPhone with Spotify is good enough for now..."

My rockboxed DX50 is uber stable

 

[Kidder]

I'm sending this to Ibassio however they are probably closed for the weekend so I'll post it here. I had a similar problem in the past it's kind of embarrassing. Any help is appreciated.  
 
.
I’m hoping you can help me out with my DX50. When I look at the internal memory on my laptop, I show two FLAC files listed. However the DX50 shows four and plays four. I believe one of the files is in recycled. What is recycled and how do I remove it? Also how come I can’t see two of the four files in explorer?
 
Also, I copied a double disc in the external memory. I named the disc’s 1 and 2 as the ripping software did not.  Even so, the DX50 put all the songs in one file and mixed up the order as each folder had songs with the same numbers starting with 1.
 
I changed the numbering instead of 1 through 9 twice, I numbered the songs in the second folder 10 through 18 in the external card however it did not rearrange the order in the DX50.
 
So what I did was to delete both folders and then copy only the first folder (disc 1) back to the memory card.  I did a rescan and to my surprise all 18 songs are still in the DX 50 and can be played via the artist menu.  However in the Ibassio Directory/SD Card file, it only shows the first disc that I reloaded.
 
Why does it show only disc 1 (which is what I would expect to see) in the Ibassio directory/SD file however still shows and plays all the songs in the Ibassio Artist or Album folder?
 
I’ve had this problem in the past, it seems that I can never really delete anything out of the Ibassio, it never goes away. I’m almost afraid to load anything else in the external memory card .

 

[olddude]

My 1.5.0 is totally stable.  My 1.2.8 was also totally stable.  
 
Many of us don't appear to be using the internal memory, instead keeping all music on an SD Card.  
 
When I rip a double album, I first rip each album to separate folders.  Then I renumber the 2nd album to continue the numbering of the first album (#1 goes from 1-13, #2 would then go from 14-22 as an example).  I then drag the 2nd album into the folder containing the 1st album (which gives me 1-22).  THEN I run the folder through (using a Mac) XLD, which allows me to edit metadata.  I make sure that naming/numbering is not going to be an issue by removing anything that would create a problem.  Then I run the whole folder through XLD to create a fresh file (I use FLAC) in a new folder, which I rename as Artist-Album.  I then place that on my card.  I never run the card in the DX50 when doing this procedure.   I have the card mounted using a card reader on my computer.  No problems of playback when doing this.  I would assume that there are Windows apps that will do the same thing.  This takes a bit of time, but works.  
 
Whenever I make changes on my card I do a rescan.  If you are having issues, try a Factory Reset and then a rescan of the card.