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

Feb 11, 2017 at 10:03 PM Post #30,226 of 42,916
   
Sounds like something was wrong, then. A brand new one should work fine under nearly all circumstances.

 
Pretty sad, you seem to love it a lot 
biggrin.gif
 Only makes me more curious! 
 
Feb 11, 2017 at 11:53 PM Post #30,227 of 42,916
  Hi Rob! @Rob Watts  @ChordElectronics
 
New Mojo owner here and I'm lovin it. It's doing a remarkable job in my 2 channel speaker system as a Dac going into my PrimaLuna Dialogue Premium HP integrated.
 
I understand that 4 clicks down from the 3V preset line level output is roughly 1.9Vrms output.
 
I understand 3 clicks down is roughly 2.1Vrms output
 
Can you kindly advise what 2 clicks and also 1 click down, are in terms of Vrms outputs?
 
Much appreciated in advance :-)

Each click down is -1dB. So 1 click will be a maximum of 2.67 V RMS, 2 is 2.38 V RMS.
 
Remember that pressing the volume after pre-set will mean that Mojo will recall the volume setting after power up, so be careful with sensitive IEM's after....
 
Rob
 
Feb 12, 2017 at 12:17 AM Post #30,229 of 42,916
Is there a known bug that the line level selection on power-on does not work while plugged-in and charging?

Doing it right now (holding both volume buttons while pressing power on) and it returns to whatever power I was at prior. I was pretty sure it was working when I was doing it before I plugged in the power. I don't want to unplug until fully charged to test my observation.
 
Feb 12, 2017 at 12:40 AM Post #30,230 of 42,916
@jark, auralic Vega was beaten long back by cheaper hugo and now even now mojo betters it at much lower price. auralic Vega measures extremely well but mojo measures better in some areas than auralic Vega. actually the reason behind mojo sounding so good is the technology used in it. auralic Vega uses ready made Sabre chips which though known for its very good specs but there is much more than that. in mojo the data is upsampled by using proprietary WTA algorithm which uses lot more number of reference samples ( taps ) to fill in the missing data than Sabre chips also the actual digital conversion in mojo takes place through pulse arrays which is unique to chord dacs and ensures better transparency, while there are many more DACs like auralic Vega based on sabre chips. I would suggest to listen to a song through mojo which you have not listened since long and you would be taken by surprise how real mojo sounds then off course you can try that song on your existing set up too .
 
Feb 12, 2017 at 12:48 AM Post #30,231 of 42,916
Just got on the Mojo appreciation train having bought one at CanJam NYC; after being floored by how well it drove the Ether Flow C, unlike my M9XX accepts 24-bit/192Khz over optical, and has a battery within it. WOW!

2015 pages in this thread. Pardon if I dont read all up to here. Hahaha. Good thing is at least, this thing is pretty dummy-proof. Nothing to search-for or ask at thing his point.


All you need to read is the third post of this thread. Almost all of the comments and questions are answered there, except for personal opinions and evaluations.

Really, go read it, you'll be happy you did in the long run,
 
Feb 12, 2017 at 1:27 AM Post #30,232 of 42,916
All you need to read is the third post of this thread. Almost all of the comments and questions are answered there, except for personal opinions and evaluations.

Really, go read it, you'll be happy you did in the long run,


I did so; line out section. Nothing has changed.

In regular 'volume mode', say ...
1) I turn volume down so both balls are green.
2) I turn the unit off and on, both volume balls return to green.
3) I turn the unit off again.
4) I press both volume buttons and hold, then I press power, still holding the volume buttons.
5) on powerup both volume balls are still green and volume level is low to match.

That ain't right.
 
Feb 12, 2017 at 1:52 AM Post #30,233 of 42,916
m8o, my previous post was only referring to your comment that you haven't read the whole thread. Besides the line-out information, there is a lot of other interesting information, especially in the 'Informative post by Rob Watts' section.

________________________________________________________________________________


I just tested mine while plugged in to my USB wall charger, battery power/charging indicator on:

- Hold all three buttons to turn on the device. My Mojo is now set to the blue/violet line level of 3Vrms.

- Lowered the volume to double red.

- Turned off the Mojo.

- Hold all three buttons from an off state and again I'm in line level mode.

Sorry, I'm not sure why yours may be different.
 
Feb 12, 2017 at 2:12 AM Post #30,234 of 42,916
Ah, ok, didn't realize. Ya, I keep returning to the faq. Lotta good stuff there.

Regarding the line selection. Ya, weird! Much thanks for trying it out!
 
Feb 12, 2017 at 5:32 AM Post #30,236 of 42,916
I have done a little write-up about the iDSD Black Label vs. the Mojo. Please don't be too harsh on me, since I am not a professional review writer, and also English is not my first language. :)

 

Where is it? I'd like to read that. :)
 
Feb 12, 2017 at 5:37 AM Post #30,237 of 42,916
Each click down is -1dB. So 1 click will be a maximum of 2.67 V RMS, 2 is 2.38 V RMS.

Remember that pressing the volume after pre-set will mean that Mojo will recall the volume setting after power up, so be careful with sensitive IEM's after....

Rob


Yeah.. I will never forget the day I pumped 2V through my shure se846...
 
Feb 12, 2017 at 9:05 AM Post #30,240 of 42,916
   
Yup.
 
On that note, does anyone have recommendations for "smaller" things to further improve the sound of my system?
 
I have no budget limit, but for this, let's say...under $70?
 
I know many of you guys like to tinker around and it would be cool to hear your ideas.
 
I was thinking something along the lines of an ear pad upgrade and/or an entry-level network player.
 
What I've got so far:
http://www.brainwavzaudio.com/collections/accessories/products/headphone-memory-foam-earpads-sheep-skin
http://www.rpimusicplayer.com
https://www.cnet.com/how-to/turn-your-raspberry-pi-into-the-ultimate-music-streamer/

 
If you want to explore raspberry pi designs, then @Staxton posted several interesting posts nearly a year ago http://www.head-fi.org/t/784602/chord-mojo-dac-amp-faq-in-3rd-post/20775#post_12766174
 
In many respects a Poly with screen, but of course it is much larger, and I expect that the Poly will generate less internal electrical noise as well.
Nevertheless, the performance would probably only be bettered by streamers using bespoke circuit boards, like the Poly of microRendu.
 

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