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

[stoobot]

Out of curiosity, anyone who uses the mojo with a Mk 1 AK70... how notable is the difference between the direct out on the AK70 and going via the mojo? Cheers!

 

[JasonZX12R]

If you purchased from a hifi retailer they supply batteries from chord for around £40 if I remember rightly

Cool thanks, let me see if I can reach out to them. I was within warranty but trying to get Chord to do warranty work is impossible.

 

[styks]

This is clear, however electrically it is advantageous to have the port directly soldered. Everything is a compromise in the end, I'm happy with the implementation but then I only transport the Mojo inside a waterproof Peli case.



Dude, would you mind awfully to make a small test with the S5? One would be to check the interference with a sim card in and check for interference (only if you're fine with sliding in a SIM card into it) and the second one would be to check if a DSD128 file plays correctly. These are the two things I struggle with the S5 and some other people don't seem to have issues with (at least not with other phones).

Ps. 6.0.1 should be the latest Marshmallow version for the S5.

Hi again,
Good news DSD 128 is playing fine, UAPP / Mojo is showing DSD colour, and it sounds stunning out of my cans!
Bad news, cellular interference is there, enough to annoy and ruin ones mojo, pun, or in this case not at all funny reference, intended!

Im actually quite annoyed by this, even though it may not effect me. Surely a very large percentage of Mojo owners will be connecting Mojo to phone?
Inexcusable cockup on Chords part, it should've been well shielded against those frequencies. I imagine there are many very fed up phone/Mojo owners?

 

[miketlse]

Hi again,
Good news DSD 128 is playing fine, UAPP / Mojo is showing DSD colour, and it sounds stunning out of my cans!
Bad news, cellular interference is there, enough to annoy and ruin ones mojo, pun, or in this case not at all funny reference, intended!

Im actually quite annoyed by this, even though it may not effect me. Surely a very large percentage of Mojo owners will be connecting Mojo to phone?
Inexcusable cockup on Chords part, it should've been well shielded against those frequencies. I imagine there are many very fed up phone/Mojo owners?

The Mojo case is aluminium so it is well shielded. The rfi is entering via the usb cable. Are you still using the samsung? When i was using the samsung galaxy note 3, all it took was to add one ferrite choke to the usb cable, to remove the rfi.

 

[RiseFall123]

I trigger the line out mode (take it down to 1.9v)

Why everybody does that (not staying on 3v)? And do you symply push down the volume x times to achieve that after you turn on the lineout mode?

 

[jarnopp]

Why everybody does that (not staying on 3v)? And do you symply push down the volume x times to achieve that after you turn on the lineout mode?

Yes, 4 clicks on the down volume ball will take it to 1.9V. People do this because the CD player standard was 2V output and many devices expect this. But, all you need to do is find out the inout sensitivity of your amp or powered speakers and match that.

 

[GrussGott]

Why everybody does that (not staying on 3v)? And do you symply push down the volume x times to achieve that after you turn on the lineout mode?

old school. inputs used be at 2v and some systems can't handle more (or distort above it), but most amps can take it. still, 3v just feels hot so I click down 4x to 2v.

 

[RiseFall123]

old school. inputs used be at 2v and some systems can't handle more (or distort above it), but most amps can take it. still, 3v just feels hot so I click down 4x to 2v.

Hi,

according to the specs of my amp it will handle?

Line Input Sensitivity 440mV @ 140W / 8Ω

http://www.roksan.co.uk/products/k3-integrated-amplifier/

 

[AndrewH13]

Found the analogue inputs on my Tag McLaren Amp have individual manual (with tape-deck like meters) or automatic setup for voltage. Either way it settled on 2.3 or 2.4v as optimum.

 

[styks]

The Mojo case is aluminium so it is well shielded. The rfi is entering via the usb cable. Are you still using the samsung? When i was using the samsung galaxy note 3, all it took was to add one ferrite choke to the usb cable, to remove the rfi.

Hi,
I agree in part, i also considered that. The is more to shielding than just a case, thick aluminium or not.
I'm an Amateur radio operator, yes it can be difficult but not unsolvable by the manufacturer.
If i had to insert/wind a ferrite choke to help with this the form factor will take a large hit.
All the after market fancy cables that ive seen do not incorperate a choke in thier design, that ive spotted anyhow.
Do some have to insert/wind chokes for headphone cable and power lead also?

It really should've been incorperated internally.

 

[Leo-]

Hi again,
Good news DSD 128 is playing fine, UAPP / Mojo is showing DSD colour, and it sounds stunning out of my cans!
Bad news, cellular interference is there, enough to annoy and ruin ones mojo, pun, or in this case not at all funny reference, intended!

Im actually quite annoyed by this, even though it may not effect me. Surely a very large percentage of Mojo owners will be connecting Mojo to phone?
Inexcusable cockup on Chords part, it should've been well shielded against those frequencies. I imagine there are many very fed up phone/Mojo owners?

Hi styks, thanks a lot for the feedback. Yeah, the S5 is very bad in pairing with the Mojo regarding interference. People have been luckier with other models however with the S5 it is truly unbearable. Your data point confirms my findings (at least I feel less weird in this thread now). There is some leakage even with the cable disconnected when the bottom of the phone is close to the USB port!

I can't recommend a ferrite but using airplane mode eliminates the issue. Good news you've got dsd128 working, this suggests I should look at a new USB cable.

Enjoy the music

 

[black9white]

What would be a desktop version of the mojo? Any alternatives, don't want to use the mojo for desktop due to the batteries

 

[435279]

I can recommend the SMSL T1, its what I use when not listening to a Mojo or Hugo 2

I'm still using the supplied valve, but intend to upgrade it one day

 

[GrussGott]

What would be a desktop version of the mojo? Any alternatives, don't want to use the mojo for desktop due to the batteries

Schiit Mimby or if you want a portable option and max flexibility, iFi iDSD Black Label micro or nano

 

[GrussGott]

Hi,
I agree in part, i also considered that. The is more to shielding than just a case, thick aluminium or not.

It really should've been incorperated internally.

totally. The "oh it comes in via the USB" excuse is laughable; as if designing for that shouldn't be a fundamental consideration. "oh, the water leak only comes into your house through the water pipes, otherwise your house is leakproof!"

Why is it so hard for people to say, "yeah, it's a big miss and they should fix it"

Being transparent about flaws builds customer loyalty - denying them breeds animosity and backlash