Chord Mojo(1) DAC-amp ☆★►FAQ in 3rd post!◄★☆
Apr 28, 2016 at 4:24 PM Post #16,952 of 42,765
It's a belter with a Stax Omega 2 and SRM-727.

Ha!

I had Mojo and Beyerdynamic T1 and was all happy, but spoiled so I needed in ear monitors and one led to another and more dissatisfaction until sold and had to land more expensive in ear!  

Mojo initially saved me money.  I sold desk top DAC and desk top Amp (both fine quality) and I sold portable DAC/Amp.  Everything replaced by Mojo. 

Now I have the Beyer AK T8 ie for portable and the T1.2 for home. 

Next will be the fancy larvicable and then the nice protective cover for Mojo and then the module for Mojo.  

Mojo demands.  
 
Apr 28, 2016 at 4:54 PM Post #16,954 of 42,765
Those of you guys who have mic cables with your IEMs/CIEMs, can you take calls through mojo on Android?  I'm looking at getting a slightly longer cable and have a choice between mic and no mic and would only get the mic cable if it meant I could take calls through Mojo.  I'm using S7 Edge and running marshmallow.
 
Apr 28, 2016 at 5:05 PM Post #16,955 of 42,765
my mojo AK problem disappeared... there was some dust on the lense of my AK.
got it out carefully with a toothpick and now it works. 
I feel stupid, but glad it works


As I suggested, you need to make sure the lens is clean. Glad you got it going! :)
 
Apr 28, 2016 at 5:12 PM Post #16,956 of 42,765
 
Completing my previous post and after a few search:
 
ADEL A12's has an efficiency of 117dB SPL / 1mW  &  16 Ohms
Therfore for a safe listening 85 dBSPL at worst case ( Full DAP/foobar/etc volume & Track at 0dBFS (Max sound level))
 
85dBSPL with A12's means: -32dBm vs 117dBSPL translating to  0.63mW / 6.28 mA rms / 0.1Vrms
Mojo at Line Out voltage is 3.1Vrms  ( translating to 600mW / 192 mA rms /  27.8 +117 =145 dBSPL into A12's 16Ohm)
 
From that theoritical 145dBSPL( Mojo Line Level is double purple ) you have to attenuate roughly 60dB or 60clicks down in order to obtain your A12's 85dBSPL.
 
PLEASE DO SO WITHOUT CONNECTING YOUR IEM/CIEM OR YOUR HEADPHONES + EARS WILL BE DESTROYED!
 
As a comparison, with my Mrspeakers ETHER C I use the following levels ( Double Red ):
 
ETHER C's    92dB SPL / 1 mw  & 22 Ohms
85dB SPL with Ether C's means: -7dBm vs 92 dB SPL translating to 0.2mW / 3mA rms / 66mV rms
Mojo at Line Out Voltage is 3.1 Vrms ( translating to 431mW / 141mA rms  / 26.3 + 92 = 118.3 dB SPL into ETHER C's 22 Ohms)
 
From that 118.3db SPL you have to attenuate roughly 34dB or 34clicks down in order to obtain your ETHER C's 85dBSPL.
 
I will appreciate some feedback regarding volumes setting from ETHER C's/Mojo owners. Bavinck, Relic and others at which level are you listenning,pls ?
In my theoretical approach , I took the worst case;i.e. O DBFS at full digital volume.
In average listening conditions, probably an average 85dB SPL will be reached with 5/6 dB attenuation less (29 clicks down vs Line out isntead of 32 clicks ).
 
N.B. Since I only know the level at Line Out without colours mistakes I didf my approach from Line Out 3.1Vrms. But it is not practical/safe for IEM users.
By chance if Chord will be kind enough to provide let's say the output rms voltage at minimum gain it will be safer/easier to set the volume from min value.
 
Regards

 
85 decibles, at least in my A12 CIEMs is extremely loud, I listen more in the 10-15 click range..
 
Apr 28, 2016 at 5:21 PM Post #16,957 of 42,765
85 decibles, at least in my A12 CIEMs is extremely loud, I listen more in the 10-15 click range..


That range sounds about right for the 16 Ohm, 116 dB efficiency of the A12 for long term listening. Very close to the JH Angie I have. Keep in mind that they are measuring down from line level.
 
Apr 28, 2016 at 6:59 PM Post #16,958 of 42,765
Hope Dave has been scotch guarded then

blink.gif

 
  UAPP is the only player that sounds as good as from the computer. I guess its becouse its the only one that passes the signal straight to the Mojo ?
To bad the interface of UAPP is not made for playing music :S

I no longer connect my Mojo to my PC any more thanks to UAPP, I get all the music on my PC or NAS drive and not tied to my desk.

As a matter of fact listening to Mojo now (and for the sake of this reply) listening via UAPP
 
bigsmile_face.gif
 
 
Apr 28, 2016 at 7:03 PM Post #16,959 of 42,765
Apr 28, 2016 at 7:07 PM Post #16,960 of 42,765
  A lot of you are saying things like "Oh yea, after I got mojo I spent way more on audiophile stuff, I got more headphones, etc".  Something similar happened to me, I spent way more too-but on music.  Even genre's I disliked got money thrown their way. #stereophile #metalbandcamp

Yeah done that too
Only had test files fro 2L before the Mojo
Since Mojo I have accounts on 2L, Qubuz, Onkyo, HD Tracks etc etc.
 
Apr 28, 2016 at 7:09 PM Post #16,961 of 42,765
  my mojo AK problem disappeared... there was some dust on the lense of my AK.
got it out carefully with a toothpick and now it works. 
I feel stupid, but glad it works

OK sending my AK100mkii to you to sort out

Thanking you in advance
 
rolleyes.gif

 
Apr 28, 2016 at 7:37 PM Post #16,962 of 42,765
Those of you guys who have mic cables with your IEMs/CIEMs, can you take calls through mojo on Android?  I'm looking at getting a slightly longer cable and have a choice between mic and no mic and would only get the mic cable if it meant I could take calls through Mojo.  I'm using S7 Edge and running marshmallow.


Not possible through the mojo, the question was asked and answered quite a way back in the thread.
 
Apr 28, 2016 at 7:58 PM Post #16,963 of 42,765
Something inside told me to check Head-fi today.. now where is that Chord Mojo case?
smily_headphones1.gif

 
Apr 28, 2016 at 10:18 PM Post #16,964 of 42,765
I was going to calculate the '85dB clicks' for my customs....
Until the sensitivity spec says '100 mV' instead of '1mW'.
Apparently, 'X (dap) + mojo = Y' isn't the only confusing debate.
 
EDIT: Despite the LEDs have pretty colors, I don't like the color system at all. I wish Chord halfed volume range twice from 90+ to 40+ clicks. The LWD color spectrum isn't enough to cover 90+ clicks indicator, but the real meh is inconsistent color system. For example:
(mute)>dim red/dim red (4x)>bright red/dim red(2x)>...........>dim red/dim red(2x)>dim red/bright red>bright red/bright red>(lost track)
 
TL;DR I just measure dB with iPhone dB meter to average 85dB & stick with it. 
 

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