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

[Daniel Johnston]

Although I did not test the actual USB connections directly, I did just try the following:

Boot the Mojo2+Poly
Disconnect Mojo2's battery
Mojo2 shuts down immediately.

Pressing the power button does not start the device.

Plugging the Poly into a power source, with Mojo2 connected and without battery connected, boots the Mojo2 immediately.

As such I believe the Mojo2 not to use the Poly as a power source.

Also while i'm at it:
Poly uses an LP113452 2100mah battery
Mojo2 uses an "DJ electronics" lp133273 1850mah battery

Because of the enormous size difference, and the bigger battery being lower capacity, I believe the poly battery to be less than 2100mah

Disconnecting both batteries and plugging them into a power source does boot up the Mojo2, but the Poly remains off.

Having the Poly battery disconnected, and the Mojo2's connected, will not boot the Poly, unless a USB cable is delivering power, and Mojo2 is turned off first. Then the Poly will give a white light, and after that you can start the Mojo2, together with the Poly.

The Poly cannot function as you noted without the Mojo. If it did, we could use the 2nd microUSB dedicated to the data stream for other DACs. To get that functionality, you need to upgrade to the 2go/2yu.

 

[CH23]

The Poly cannot function as you noted without the Mojo. If it did, we could use the 2nd microUSB dedicated to the data stream for other DACs. To get that functionality, you need to upgrade to the 2go/2yu.

at no point in those tests did i try to use the poly without the mojo2 attached. This was entirely about the power delivery for the mojo2poly as a whole
Though now I want to test the Poly and see if it'll work with my Qutest. I have some micro usb extention cables so I could do it...

 

[miketlse]

at no point in those tests did i try to use the poly without the mojo2 attached. This was entirely about the power delivery for the mojo2poly as a whole
Though now I want to test the Poly and see if it'll work with my Qutest. I have some micro usb extention cables so I could do it...

I think some owners tried, and it was possible then.
Several years later, I don't know if it's still possible.

The links are in this post, if you want to try and replicate their systems.
https://www.head-fi.org/threads/cho...ful-info-on-1st-page-◄★☆.831347/post-15532240

 

[Daniel Johnston]

I think some owners tried, and it was possible then.
Several years later, I don't know if it's still possible.

The links are in this post, if you want to try and replicate their systems.
https://www.head-fi.org/threads/chord-electronics-☆-poly-☆-wireless-microsd-module-for-mojo-☆★►useful-info-on-1st-page-◄★☆.831347/post-15532240

IIRC, you have to activate the Poly using the Mojo then plug in the DAC. I think this broke after FW 2.0.

I’ll be curious to see @CH23 results. It’d be nice to use the Poly as a 2go/2yu lite.

 

[Soundizer]

I am not a fan of compressed Bluetooth audio in general, however would consider Apple Airplay which is much higher resolution compared to Bluetooth typically.

Has anyone tried APPLETV Airplay to Poly and if so how is the sound and any lip sync issues?

 

[VishnuKare]

I am not a fan of compressed Bluetooth audio in general, however would consider Apple Airplay which is much higher resolution compared to Bluetooth typically.

Has anyone tried APPLETV Airplay to Poly and if so how is the sound and any lip sync issues?

I tried streaming apple tv from mac to poly, but the delay was more and caused lip sync issues.

 

[BS5711]

Well, some further talk about a Mojo 2.1 from a chap that talked directly to Rob Watts.

I would buy one if they dropped the ridiculously outdated micro ports.

 

[ra990]

It would make more sense for them to release a Hugo 3 with EQ and upgraded ports. That's long overdue for a refresh.

 

[Atriya]

Yes - both need to be white for it to clip. This of course assumes that no boost EQ is employed - if you added +3dB via the EQ then you would need to go 3 steps down to guarantee no clipping with 0dB FS input signals (that's the max possible from digital).

Should one conclude from this that the setting just below "both white" (i.e., the one where the left light is ultra-violet and the right light is white) is the setting corresponding to 0dB & no digital volume control being done by the Mojo 2? Or would that be the "both white" setting?

I assume this 0dB setting is the one that should be used by a user who, for whatever reason, is connecting an external amp to the Mojo 2.

 

[jarnopp]

Should one conclude from this that the setting just below "both white" (i.e., the one where the left light is ultra-violet and the right light is white) is the setting corresponding to 0dB & no digital volume control being done by the Mojo 2? Or would that be the "both white" setting?

I assume this 0dB setting is the one that should be used by a user who, for whatever reason, is connecting an external amp to the Mojo 2.

That may be too hot. Double indigo (2v) into the purples below double white (4v) might be a better range. I think there are 3 steps of whites at the top that are 0-18dB and might cause clipping, based on the color voltage chart posted elsewhere in this thread.

 

[Daniel Johnston]

Should one conclude from this that the setting just below "both white" (i.e., the one where the left light is ultra-violet and the right light is white) is the setting corresponding to 0dB & no digital volume control being done by the Mojo 2? Or would that be the "both white" setting?

I assume this 0dB setting is the one that should be used by a user who, for whatever reason, is connecting an external amp to the Mojo 2.

If you are using it to feed an amp, 4V to the SE inputs will likely clip. 2V is standard line out voltage. Some amps can take 3V. 4V will likely cause issues.

 

[Hypops]

Should one conclude from this that the setting just below "both white" (i.e., the one where the left light is ultra-violet and the right light is white) is the setting corresponding to 0dB & no digital volume control being done by the Mojo 2? Or would that be the "both white" setting?

I assume this 0dB setting is the one that should be used by a user who, for whatever reason, is connecting an external amp to the Mojo 2.

According to GoldenSound's measurements, the Mojo 2 is at peak performance between 2V and 4.3V. Many modern amps are fine with the additional voltage over RCA. Check your amp's specs (mine's good up to 7V). As GoldenSound reminds us, knocking the Mojo 2's output down from 4.3V to 2V "just because" could be sacrificing an additional 6dB of dynamic range for no reason.

 

[Atriya]

According to GoldenSound's measurements, the Mojo 2 is at peak performance between 2V and 4.3V. Many modern amps are fine with the additional voltage over RCA. Check your amp's specs (mine's good up to 7V). As GoldenSound reminds us, knocking the Mojo 2's output down from 4.3V to 2V "just because" could be sacrificing an additional 6dB of dynamic range for no reason.

Yes, exactly. My external amp can handle 4.3V input via RCA. My main concern is finding the "left and right lights" configuration for the point where the Mojo 2 does no digital attenuation of it's own (i.e., the 0dB point).

From the voltage chart posted earlier on this thread, it seems that should be either ultraviolet-white, or white-white. I'm just not sure which.

 

[MarkParity]

Well, some further talk about a Mojo 2.1 from a chap that talked directly to Rob Watts.

I would buy one if they dropped the ridiculously outdated micro ports.

A 2.1 minor update probably means the micro USB ports will stay. Mojo 3 will probably have USB C ports exclusively followed by a new version of the Poly, or more likely a discontinuation of the Poly.

 

[jjazzy]

A 2.1 minor update probably means the micro USB ports will stay. Mojo 3 will probably have USB C ports exclusively followed by a new version of the Poly, or more likely a discontinuation of the Poly.

I hope at least with a mojo3 something like a poly2 will exist, the sound quality is too good as a combo