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

[GRUMPYOLDGUY]

  I prefer using Mojo as a dac through the line out, but the battery drains pretty fast. Would it scaling down Mojo's output for few notches like from 3V to 2V affect the line out sound quality? I would like to extend the battery life but am not sure what degree of degradation could the attenuator cause to the signal.

 
Only in the sense that you will about 3.5dB closer to the noise floor. 
 
But lowering the volume will not add any new distortion that wasn't already present.
 
Two points:
1. 3Vrms is already attenuated down from the 5Vrms at full scale, so you're already using the "attenuator"
2. The volume is digital gain control... not part of the analog path AFAIK.

 

[DjBobby]

   
Only in the sense that you will about 3.5dB closer to the noise floor. 
 
But lowering the volume will not add any new distortion that wasn't already present.
 
Two points:
1. 3Vrms is already attenuated down from the 5Vrms at full scale, so you're already using the "attenuator"
2. The volume is digital gain control... not part of the analog path AFAIK.

Many thanks. Right now my Mojo switched off after being in use through line out for less than half a day. So basically I should try to find alternative desktop AC powered solution with similar fantastic sound signature, which I wouldn't need to charge every day. And which doesn't cost as much as Dave. 

 

[almarti]

Many thanks. Right now my Mojo switched off after being in use through line out for less than half a day. So basically I should try to find alternative desktop AC powered solution with similar fantastic sound signature, which I wouldn't need to charge every day. And which doesn't cost as much as Dave. 

Same need at my side, when you find it share it please

 

[GRUMPYOLDGUY]

Many thanks. Right now my Mojo switched off after being in use through line out for less than half a day. So basically I should try to find alternative desktop AC powered solution with similar fantastic sound signature, which I wouldn't need to charge every day. And which doesn't cost as much as Dave. 

I think you are supposed to get an estimated 6-8 hours of run time. If you're actually using it as portable (as opposed to transportable), you might consider one of those USB battery banks. You can get decent capacity in a surprisingly small footprint these days.

 

[rwelles]

 
Many thanks. Right now my Mojo switched off after being in use through line out for less than half a day. So basically I should try to find alternative desktop AC powered solution with similar fantastic sound signature, which I wouldn't need to charge every day. And which doesn't cost as much as Dave. 

I could be wrong, but isn't that called a 2Qute?? 

 

 

[musickid]

i just read on here that mojo experiences distortion through usb computer link due to not being galvanically isolated. is this really true?? also  are jitterbugs and similar the way to go with mojo or has anyone tried a full size isolator like the intona?
 
finally how does the mojo perform so well with low to high impedence phones with no effort at all. it doesn't have a gain switch so what's the science behind this aspect? thanks to all

 

[GRUMPYOLDGUY]

i just read on here that mojo experiences distortion through usb computer link due to not being galvanically isolated. is this really true?? also  are jitterbugs and similar the way to go with mojo or has anyone tried a full size isolator like the intona?

finally how does the mojo perform so well with low to high impedence phones with no effort at all. it doesn't have a gain switch so what's the science behind this aspect? thanks to all

Yes, it's true and the measurements show it.

I think someone mentioned the intona will drain your source's battery very quickly.

You could use jitterbug, there are cheaper solutions though. Ferrite beads can be had for peanuts on digikey.

 

[GRUMPYOLDGUY]

I could be wrong, but isn't that called a 2Qute?? :rolleyes:  

I could be wrong, but isn't that 3x the cost of a Mojo?
:rolleyes:

Plugging in the Mojo might be a better solution.

 

[rwelles]

I could be wrong, but isn't that 3x the cost of a Mojo?

Plugging in the Mojo might be a better solution.

DjBobby asked for something less than a Dave... But yes, plugging in a Mojo is certainly less expensive.  

 

[Mython]

 

I could be wrong, but isn't that called a 2Qute?? 

 

I could be wrong, but isn't that 3x the cost of a Mojo?

 
 
Maybe Chord should've charged 3x more for Mojo?

 

[x RELIC x]

i just read on here that mojo experiences distortion through usb computer link due to not being galvanically isolated. is this really true?? also  are jitterbugs and similar the way to go with mojo or has anyone tried a full size isolator like the intona?

finally how does the mojo perform so well with low to high impedence phones with no effort at all. it doesn't have a gain switch so what's the science behind this aspect? thanks to all

Mojo experiences these distortions no more than any other device as the noise/distortions come from the source. It's just that many want to obtain the cleanest sound possible to not interfere with the Mojo's 'magic'.

 

[AlexB73]

   
Only in the sense that you will about 3.5dB closer to the noise floor. 
 
But lowering the volume will not add any new distortion that wasn't already present.
 
Two points:
1. 3Vrms is already attenuated down from the 5Vrms at full scale, so you're already using the "attenuator"
2. The volume is digital gain control... not part of the analog path AFAIK.

My integrated tube amp works well with very height voltage input. It also have very high quality volume control discrete L-Pad.
Can I run Mojo with higher output than 3V?
How many clicks should I do to increase volume from 3V?

 

[musickid]

​given everything thats been said what are the best usb "cleaners" to minimize any source distortion reaching mojo? I guess the intona is way over the top and maybe you could better the jitterbug?

 

[Mediahound]

 
​given everything thats been said what are the best usb "cleaners" to minimize any source distortion reaching mojo? I guess the intona is way over the top and maybe you could better the jitterbug?

 
I'm happy with the Jitterbug myself. Anything above that seems like overkill. 

 

[maxh22]

​given everything thats been said what are the best usb "cleaners" to minimize any source distortion reaching mojo? I guess the intona is way over the top and maybe you could better the jitterbug?

Haven't tested the Jitterbug but the Intona improves Mojo's sound pretty significantly and further improves with a Regen and or Wyrd.

Intona helps to unleash Mojos three-dimensionality. The sense of depth becomes more apparent. It makes for a smoother and more realistic sound.