Chord Mojo(1) DAC-amp ☆★►FAQ in 3rd post!◄★☆

[Kentajalli]

I've received two Mojos in a row (from Amazon) that were fully discharged upon arrival. I imagine they've been sitting on the shelf for a while. Anyway, neither of them will charge. I've tried 5 different USB chargers, several different USB A to Micro USB cables and get the same results. Here's what I've observed.

• While off, the power LED / Charge indicator does not light up. I've left each connected to power for 24-48 hours with no luck and no charging
• While connected to power, I can turn each on and the power LED / Charge indicator flashes red 2-3 times before turning solid white
• I can use each while connected to power, no problem
• If I turn them off while still connected to power, the power LED / Charge indicator turns off and will not turn back on unless the unit is powered back on
• If I disconnect power after having been powered on and connected to power for several hours, each turn off immediately indicating they have 0 charge

I figured the first unit was simply faulty but it seems unlikely to receive two units in a row with the same defect. I'll also add that I can charge my Poly from the same USB chargers/cables with no issue. Is this a known behavior and if so, how can I get these Mojos to charge?

both may have bad batteries or bad battery connection on the inside.
if you feel like it, with the correct hex tool, carefully open one, disconnect the battery plug from main board, re insert it a couple of times (to clean the pins) and see if you get joy.
if not return them.

 

[118900]

The one on the right, with the little battery icon

Have you tried leaving it connected overnight? Sometimes when the battery is really dead it can take ages for the cycle to start up.

@tret
having re-read your post please ignore the above. What current are your chargers rated at?

The one on the right, with the little battery icon

I would strongly suggest you do not open it up under any circumstances as suggested by someone as this would invalidate the warranty and you risk being lumped with a mojo that doesn’t work and that you cannot have replaced or be reimbursed for.

 

[Kentajalli]

Have you tried leaving it connected overnight? Sometimes when the battery is really dead it can take ages for the cycle to start up.

@tret
having re-read your post please ignore the above. What current are your chargers rated at?


I would strongly suggest you do not open it up under any circumstances as suggested by someone as this would invalidate the warranty and you risk being lumped with a mojo that doesn’t work and that you cannot have replaced or be reimbursed for.

Juansan has a point.
Why haven't you contacted Chord? they may have a solution.
you can ask them, if they allow you to do the test I mentioned, if they do, there would be no issue with your warranty.
Alternatively , just return them to Amazon.

 

[tret]

both may have bad batteries or bad battery connection on the inside.
if you feel like it, with the correct hex tool, carefully open one, disconnect the battery plug from main board, re insert it a couple of times (to clean the pins) and see if you get joy.
if not return them.

Since they are brand new and can easily be returned I think I'll just do that if need be. Certainly don't want any questions raised if they discover it has been opened.

What current are your chargers rated at?

Here are a few:

• Apple A1385: 5V - 1A
• Anker PowerPort+: 3.6-6.5V - 3A / 6.5-9V - 2A / 9-12V - 1.5A
• Choetech Q5003-US: 3.6-6V - 3A / 6-9V - 2A / 9-12V - 1.5A
  

Juansan has a point.
Why haven't you contacted Chord? they may have a solution.
you can ask them, if they allow you to do the test I mentioned, if they do, there would be no issue with your warranty.
Alternatively , just return them to Amazon.

I'll reach out to Chord and see what they have to say. Thanks!

 

[118900]

Since they are brand new and can easily be returned I think I'll just do that if need be. Certainly don't want any questions raised if they discover it has been opened.


Here are a few:

• Apple A1385: 5V - 1A
• Anker PowerPort+: 3.6-6.5V - 3A / 6.5-9V - 2A / 9-12V - 1.5A
• Choetech Q5003-US: 3.6-6V - 3A / 6-9V - 2A / 9-12V - 1.5A

I'll reach out to Chord and see what they have to say. Thanks!

I myself use the apple one for mine. Very sad to hear you have had issues with both.

 

[v1rooz]

Hello guys i need an advice. Im using neutron music player with mojo and hifiman he-400i over android. All my music is 16/44100 flac. Today i tried upscalling to dsd (white diode lit on mojo). And the sound was incredibly different. Much more airy, instuments better placed around my head, some rock music were sounding almost like live concert. With pcm signal not upscalled sound is more warm i think, a little muddy?? Whole life i was reading upscalling is very bad, for the best results use only native bitrate etc. And my question is why 16/44100 upscalled to dsd sound more like live music with almost every aspect reproduced better) mojo has some awesome dsd chip or what. Or maybe its only my impression and i should never ever use upscale mode in neutron? Help me with that guys i do not understand that really.

 

[118900]

Hello guys i need an advice. Im using neutron music player with mojo and hifiman he-400i over android. All my music is 16/44100 flac. Today i tried upscalling to dsd (white diode lit on mojo). And the sound was incredibly different. Much more airy, instuments better placed around my head, some rock music were sounding almost like live concert. With pcm signal not upscalled sound is more warm i think, a little muddy?? Whole life i was reading upscalling is very bad, for the best results use only native bitrate etc. And my question is why 16/44100 upscalled to dsd sound more like live music with almost every aspect reproduced better) mojo has some awesome dsd chip or what. Or maybe its only my impression and i should never ever use upscale mode in neutron? Help me with that guys i do not understand that really.

Never ever upscale to mojo, let mojo handle the native signal it’s original format.

Most upscaling is very poorly implemented unless you go for the chord Mscaler which is about 4000 GBP and doesn’t work with the mojo anyway.

the mojo handles dsd over pcm (DOP). It doesn’t “convert” dsd to analogue natively.

 

[v1rooz]

Yes it is that option what im talking about. When i enabled DoP with pcm do dsd in the dop submenu sound changed but white diode on mojo started to lit. In dop submenu is another option native dsd and when it is enabled diode at mojo is red like should be for 44100, but with this option eq doesnt work.

Why i think, with DoP and PCM to DSD mode on. Sound is impressive better, the same lvl of details but better placed and more airy? This mode make sound fake?


For conclusion for best results with my format what options i should turn on/off?
DoP - on/off
submenu:
PCM to DSD - on/off
native dsd on/off

 

[118900]

Yes it is that option what im talking about. When i enabled DoP with pcm do dsd in the dop submenu sound changed but white diode on mojo started to lit. In dop submenu is another option native dsd and when it is enabled diode at mojo is red like should be for 44100, but with this option eq doesnt work.

Why i think, with DoP and PCM to DSD mode on. Sound is impressive better, the same lvl of details but better placed and more airy? This mode make sound fake?


For conclusion for best results with my format what options i should turn on/off?
DoP - on/off
submenu:
PCM to DSD - on/off
native dsd on/off

I would leave everything native

@v1rooz
edit to clarify: DoP: off

 

[v1rooz]

Thanks for advice.

 

[118900]

I would leave everything native

Thanks for advice.

No problem

 

[CJG888]

I would consider unpacking to WAV at the native bit depth and sample rate. It seems, to my ears at least, to sound marginally better than FLAC or ALAC.

 

[CJG888]

It’s not always practical with portable devices, though...

 

[Kentajalli]

Yes it is that option what im talking about. When i enabled DoP with pcm do dsd in the dop submenu sound changed but white diode on mojo started to lit. In dop submenu is another option native dsd and when it is enabled diode at mojo is red like should be for 44100, but with this option eq doesnt work.

Why i think, with DoP and PCM to DSD mode on. Sound is impressive better, the same lvl of details but better placed and more airy? This mode make sound fake?


For conclusion for best results with my format what options i should turn on/off?
DoP - on/off
submenu:
PCM to DSD - on/off
native dsd on/off

you probably are either going through some sort of DSP ( equal, effects etc.) when not is DSD , and when you output in DSD they probably get switched off.
there is no reason why DSD output from Neutron should in anyway be superior .
To add to that, Mojo transcodes DSD back to PCM in order to work with it.
You have paid good money for Mojo to do the upscale (to 768KHz) with finesse!
Neutron should just dish out the bits untouched.
to answer your last question , select only Native DSD on Neutron under DSD settings.
Also make sure under audio hardware, Mojo is picked up.

 

[Julius Decimus]

Hello guys i need an advice. Im using neutron music player with mojo and hifiman he-400i over android. All my music is 16/44100 flac. Today i tried upscalling to dsd (white diode lit on mojo). And the sound was incredibly different. Much more airy, instuments better placed around my head, some rock music were sounding almost like live concert. With pcm signal not upscalled sound is more warm i think, a little muddy??

Yes, there is difference. If upsampling to DSD sounds better to you, then leave it on.
Though, use 64bit processing on + DSD64. Or 32 bit + DSD128, or 64bit + DSD128. Just not 32bit + DSD64 (might not hear so noticable effect).

Take a look at this post: https://www.head-fi.org/threads/watts-up.800264/page-34#post-13934433

There is explained why it sounds softer with upsampling to DSD.