Chord Mojo 2 Thread ___ [product released January 31, 2022 -- starting on page 95 of thread]

[HTML]

Just got my order for the Mojo2 in. Can't wait for it to arrive!

 

[Soundizer]

In the UK the Mojo 2 is £450 and the Diablo is £900, despite both being UK companies....

Just got my order for the Mojo2 in. Can't wait for it to arrive!

How much is mojo2 in usa?

 

[Soundizer]

More than twice:
- power consumption at Normal
- battery power
- size
- weight
- over 4 times power
It is more like Hugo2.
...
Did I mention it has Milf Resistors ?

I cannot resist a good Milf. That’s me out

 

[Zachik]

I get a little apprehensive, when any manufacturer starts to quote the opamp model numbers, DAC chips series etc. To me, it says "we are filling the void of low-design by exotic components".

A LOT of audiophiles want and expect those technical specs. When not provided by the vendor - they start complaining.
I guess you cannot satisfy everyone...
But seriously, it is better to provide all the info, and let people (like you) filter out what they do not care for.

ifi is a respectable company, they should avoid that, but these are Covid days, economy not what it used to be.

Yup - great company, and following some of their product threads, people ask for that stuff. iFi is doing the right thing providing it (IMHO).

 

[Kentajalli]

I cannot resist a good Milf. That’s me out

Neither can I.
Does this mean the Diablo is for fussy younger blokes?

 

[Soundizer]

Neither can I.
Does this mean the Diablo is for fussy younger blokes?

Hey come on, that’s a tad ageist

 

[NoTimeFor]

Hey @Rob Watts, can you confirm if Mojo 2 draws power directly from the plug when in desktop mode? Thx.

 

[Amlalsulami]

Still waiting Mojo2 and HiBy R3 combo case

 

[HTML]

How much is mojo2 in usa?

In Singapore it's around 620USD

 

[rkt31]

@Rob Watts , if dsp is 104bit, does it mean volume control and other processing like digital filtering also is 104 bit accurate ?

 

[Rob Watts]

Hey @Rob Watts, can you confirm if Mojo 2 draws power directly from the plug when in desktop mode? Thx.

When in desktop mode the battery is completely isolated, so power only comes from the charger circuit, in this case a low impedance high current regulator replaces the battery and provides power to the device.

@Rob Watts , if dsp is 104bit, does it mean volume control and other processing like digital filtering also is 104 bit accurate ?

Short answer yes. Long answer is more complicated than that - as different digital circuits have very different requirements for transparency. So the IIR filter needs noise shaping and 104 bits to be transparent, but an FIR filter (like the WTA filter) needs smaller DSP bit depth. This is because an IIR filter (which is doing the EQ) is recursive (that is the signal is being fed back continuously so small consistent errors end up being huge) and so has different requirements to the WTA filter.

But IIR filters and FIR filters and all digital modules processing audio have a common requirement for transparency - that is being able to reproduce a -301dB signal with perfect amplitude and phase accuracy compared to 0dB. It's just that to do this you require different bit depths to maintain this accuracy. In the case of Mojo 2, I used the 104 bit UHD DSP core to do the volume control too, but that doesn't mean that you have to use 104 bits for volume control - but you do need to ensure that when the volume control is functioning, that the -301dB signal is perfectly reproduced if you want a transparent volume control.

In the case of the EQ - the IIR bi-quad filters - you do indeed need 104 bits plus noise shaping of all the internal nodes - to perfectly reproduce -301dB when the filters are active.

 

[rkt31]

When in desktop mode the battery is completely isolated, so power only comes from the charger circuit, in this case a low impedance high current regulator replaces the battery and provides power to the device.



Short answer yes. Long answer is more complicated than that - as different digital circuits have very different requirements for transparency. So the IIR filter needs noise shaping and 104 bits to be transparent, but an FIR filter (like the WTA filter) needs smaller DSP bit depth. This is because an IIR filter (which is doing the EQ) is recursive (that is the signal is being fed back continuously so small consistent errors end up being huge) and so has different requirements to the WTA filter.

But IIR filters and FIR filters and all digital modules processing audio have a common requirement for transparency - that is being able to reproduce a -301dB signal with perfect amplitude and phase accuracy compared to 0dB. It's just that to do this you require different bit depths to maintain this accuracy. In the case of Mojo 2, I used the 104 bit UHD DSP core to do the volume control too, but that doesn't mean that you have to use 104 bits for volume control - but you do need to ensure that when the volume control is functioning, that the -301dB signal is perfectly reproduced if you want a transparent volume control.

In the case of the EQ - the IIR bi-quad filters - you do indeed need 104 bits plus noise shaping of all the internal nodes - to perfectly reproduce -301dB when the filters are active.

Thanks for clarifying !

 

[surfgeorge]

Still waiting Mojo2 and HiBy R3 combo case

That case for Mojo + R3 was my design work.
If someone would be willing to lend me the Mojo 2 for 2-3 weeks please send me a PM, then I can adapt the case design.
I’m in Austria, and I’d provide the lender a 3D printed combo case and transport box as a thank you.

 

[vlach]

When in desktop mode the battery is completely isolated, so power only comes from the charger circuit, in this case a low impedance high current regulator replaces the battery and provides power to the device.

Rob,
Am i correct in thinking that removing the battery and powering the M2 with an external 5V battery pack is essentially equivalent to the desktop mode, and that the charging circuit would power the device?

 

[dsrk]

@Rob Watts
If the second 3.5mm port supports line out/optical out, that would be wonderful.