[kanefsky]

Nevertheless, just out of curiosity I'm testing my Mojo 2 right now on an Intel-based Mac using an OWC Thunderbolt 4 cable with the headphone output connected to a powered speaker. I have the Mojo 2 set to max volume and the speaker volume turned down so presumably any burst of white noise wouldn't be much louder than other sounds if it occurs. Nothing so far.

I ran my Mojo 2 for eight hours or so using the OWC Thunderbolt 4 cable on my Mac using a variety of apps and also with the system notification sounds being routed to it. I did a lot of starting and stopping, switching between apps like Amazon Music and Roon, playing random Twitter videos, and extended periods of uninterrupted music playback and never experienced the white noise.

What I did realize after the eight hours is that not only doesn't it charge the battery from the USB-C port, but it can't even run in desktop mode off the USB-C port with a fully charged battery. The battery had been draining the whole time and I had to plug in a micro-USB cable in addition to the USB-C cable to get it going again. I guess I was a little confused by some of the descriptions of desktop mode and was thinking it could essentially bypass the battery when it's plugged into USB-C. But bypassing the battery apparently only refers to drawing power from the dedicated micro-USB charging port while playing audio using one of the other USB ports.

 

[iDesign]

What I did realize after the eight hours is that not only doesn't it charge the battery from the USB-C port, but it can't even run in desktop mode off the USB-C port with a fully charged battery. The battery had been draining the whole time and I had to plug in a micro-USB cable in addition to the USB-C cable to get it going again. I guess I was a little confused by some of the descriptions of desktop mode and was thinking it could essentially bypass the battery when it's plugged into USB-C. But bypassing the battery apparently only refers to drawing power from the dedicated micro-USB charging port while playing audio using one of the other USB ports.

That is well covered in the included owners manual.

 

[kanefsky]

That is well covered in the included owners manual.

The manual isn't very explicit about it, which it probably should be since the assumption is that all USB ports can provide power to some extent (USB-C can send 100 watts to simultaneously power and charge a giant laptop while sending 6K video, dozens of channels of hi-res audio, and many other things all at the same time but obviously I don't expect that from the Mojo 2). Even portable hard drives that include special cables that can draw power from two USB ports have almost always worked fine with a single USB port in my experience.

There are lots of headphone amps that can drive headphones reasonably well running off a single USB data port, and you even have things like the RME Babyface Pro FS that can not only drive headphones but do both A/D and D/A conversion, provide preamplification and phantom power for a couple microphones, mixing, parametric EQ, reverb, delay, etc. all off a single USB 2.0 port.

 

[Stevko]

so the white noise only appear on pc\mac? And is ok with right cable and exclusive mode?
ios/android= OK?

 

[joshnor713]

I'm surprised to hear about the white noise thing. Have had the Mojo 1 for four years and Hugo 2 two years, used them with three different Windows PC's (and Android and iPhone) and never once heard this noise.

Only platform I haven't used them on is Mac.

 

[Stevko]

maybe because of new USB SW in Mojo2?

 

[Jeffyue]

The manual isn't very explicit about it, which it probably should be since the assumption is that all USB ports can provide power to some extent (USB-C can send 100 watts to simultaneously power and charge a giant laptop while sending 6K video, dozens of channels of hi-res audio, and many other things all at the same time but obviously I don't expect that from the Mojo 2). Even portable hard drives that include special cables that can draw power from two USB ports have almost always worked fine with a single USB port in my experience.

There are lots of headphone amps that can drive headphones reasonably well running off a single USB data port, and you even have things like the RME Babyface Pro FS that can not only drive headphones but do both A/D and D/A conversion, provide preamplification and phantom power for a couple microphones, mixing, parametric EQ, reverb, delay, etc. all off a single USB 2.0 port.

I believe charging can only be done via USB A but not USB C port.

 

[Scorpio1957]

I believe charging can only be done via USB A but not USB C port.

 

[Scorpio1957]

Guys,

If you don’t have it here is the link for the Chord Mojo 2 in depth manual from their website.


https://chordelectronics.co.uk/wp-content/uploads/2022/02/Mojo-2-user-manual-V.1.1.pdf

 

[Ivan Reis]

I've had the Mojo for over 4 years and I've never had any issues with white noise.

I bought the Mojo 2 a week ago and today I was surprised by the white noise....

I was using it straight from my iPod Touch through the USB C/Lightning cable that came with my Lotoo Paw S1.

It was a terrifying noise and even more terrifying was the fear of having damaged the speakers of my Sennheiser IE900...

Luckily I had no problems with IE900.

All Ipod Touch sounds were off, as well as wifi and bluetooth.

I don't have any extra apps installed on the iPod Touch, even the original Apple apps that could be deleted I deleted.

I only use the Music app on Ipod Touch, to listen only to songs downloaded to the Ipod (to allow wi-fi and bluetooth off).

I don't know what could have caused the noise...

As I have the Chord Poly I will use the Mojo 2 with it to listen via AirPlay (which limits the audio quality) or through the songs recorded on my microSD card in the Poly (which give me full quality but is much less practical).

But this Mojo 2 problem is at least disappointing....

Does anyone know of any USB C/Lightning cable "immune" to this problem?

As there is no firmware update for the Mojo, I believe that this problem will never be solved...

 

[headfry]

I've had the Mojo for over 4 years and I've never had any issues with white noise.

I bought the Mojo 2 a week ago and today I was surprised by the white noise....

I was using it straight from my iPod Touch through the USB C/Lightning cable that came with my Lotoo Paw S1.

It was a terrifying noise and even more terrifying was the fear of having damaged the speakers of my Sennheiser IE900...

Luckily I had no problems with IE900.

All Ipod Touch sounds were off, as well as wifi and bluetooth.

I don't have any extra apps installed on the iPod Touch, even the original Apple apps that could be deleted I deleted.

I only use the Music app on Ipod Touch, to listen only to songs downloaded to the Ipod (to allow wi-fi and bluetooth off).

I don't know what could have caused the noise...

As I have the Chord Poly I will use the Mojo 2 with it to listen via AirPlay (which limits the audio quality) or through the songs recorded on my microSD card in the Poly (which give me full quality but is much less practical).

But this Mojo 2 problem is at least disappointing....

Does anyone know of any USB C/Lightning cable "immune" to this problem?

As there is no firmware update for the Mojo, I believe that this problem will never be solved...

 

[headfry]

I have M1 and M2 and have had the white noise issue with each, using with micro USB cable. Generally happens
in my case when the Mojo's USB connector gets accidentally dislodged. I'm quite sure the issue isn't with the Mojo 2 as I haven't had
the issue for weeks, since using my tablet for music playback instead of my Mac. It's really stable now, no noise!

I haven't used the USB C input as I don't have any good sounding USB-C cables, if one is
available I may switch (the Apple USB-C charging cable's works but doesn't sound as good as.....)
currently using my trusty Curious Hugo Link along with AQ JB and
Apple USB-C adapter to iPad Pro. As long as I don't move the Mojo 2 there is no issue with white noise.

Hopefully the issue will soon be resolved for you, however I'm quite sure it's not an issue that affects Mojo 2
in particular, it's been reported with other Chord DACS including Mojo 1, Qutest and Dave and other makes of
DAC's as well.

 

[kumar402]

I have never heard any white noise from my Mojo 1 and I have it since March 2016.

I don’t think it is common with Mojo 1 as it is with Mojo 2

 

[scarfacegt]

So i got the mojo 2 today,and it sounds fantastic,but i hear some distortion in the sound that come and go.Like the sound of the sparkling in a fireplace.Jitter? I use the cable that followed my samsung note 10 plus.Maybe i should get another cable?

 

[kumar402]

So i got the mojo 2 today,and it sounds fantastic,but i hear some distortion in the sound that come and go.Like the sound of the sparkling in a fireplace.Jitter? I use the cable that followed my samsung note 10 plus.Maybe i should get another cable?

Yes, that’s the packet drop. It may be cable related but most of the time source is the culprit.