Chord Mojo(1) DAC-amp ☆★►FAQ in 3rd post!◄★☆
Mar 9, 2017 at 3:37 PM Post #30,962 of 42,765
Does anyone use this with the LCD-3s? If so how does it perform?


I use it with the LCD-3 and to my taste it sounds very good. With some amps the LCD-3 can have a bit too much bass, or not tight enough. With the Mojo it is nicely in balance, even classical music sounds good with this combination, enjoyed listening to a live broadcast last night and getting the feel as if I was in the hall.
 
Mar 9, 2017 at 4:37 PM Post #30,963 of 42,765
  Can anyone explain the volume colors on the Mojo please?

Detailed information about Mojos volume levels & associated button colours (Click to hide)
 
  guys sorry to ask but this volume table is for the hugo...I can't find a similar one for the mojo.
 

 
 
1/found my volume setting is blue to purple-ish (using flc 8s...have a pretty good seal, too)
based on this table i'm a bit concerned.... am i going deaf? (this is when outside, walking around, however)
 
2/also find my battery life is not 8 hrs...more like 4-5 based on my listening so far....anyfind have similar experiences?

The color setting for Hugo and Mojo is the same - the only difference is below -43 dB and above +3dB the differing light scheme kicks in. Also you can see variations in the two balls color as it gets closer to the next level.
 
As for battery life, this depends upon how well charged it is, and whether you are using USB or optical/coax, how loud you play, and the impedance of the headphones. So driving 300 ohms, using optical, green volume, you will get 8 hours. Use USB it will be 6 and a half hours. Use a low impedance IEM, green volume, and it will get worse. Use an 8 ohm loudspeaker and you will get even lower battery life.
 
Rob

 
 
Thanks to GRUMPYOLDGUY for creating the following Mojo-specific spreadsheet:
 
  The color indicator/volume problem isn't really a problem. Just start the Mojo in preset mode and count clicks to get to the right output level.
 
Preset is 3Vrms, each click is 1dB... Here's a summary of the math to get to your desired dB SPL level...
 
You need to know two parameters about your headphones:
 
Nominal sensitivity (dB SPL/mW) 
Nominal impedance (Ohms)
 
 
Step 1: Calculate sensitivity as dB SPL / 1 Vrms
Y = y0 + 10*log10(1000/Z)
y0 = headphone nominal sensitivity (dB SPL/mW), Z = headphone nominal impedance
 
Step 2: Pick a target volume (dB SPL) and figure out output level needed to achieve it
V = 10^((T-Y)/20)
V = target level (Vrms), T = target loudness (dB SPL), Y = calculated sensitivity
 
Step 3: Loss due to Mojo output impedance
Loss(dB) =  20*log10(Z/(Z+0.075))
Z = headphone nominal impedance, 0.075 = Mojo nominal output impedance
 
Step 4: Find how many dB down the target level is from the preset
L = 20*log10(V/3) - Loss(dB)
 
Simply round the number above to figure out how many clicks from the preset you need to go. 
 
I created a little spreadsheet to calculate the right levels for directly driving headphones from the Mojo... 
 

 
MojoLevelCalculator.xlsx 11k .xlsx file

 
 


 
Mar 9, 2017 at 4:56 PM Post #30,964 of 42,765
Im saying it, AKG K612 and Mojo best pairing iv ever heard. Listening to Beyond Creation - The Aura and its amazing, never hear technical death metal sound so good.
 
The speed and completely effortless sound coming to my ears is like nothing iv heard, if you have the headphones that can handle this type of complexity give them a try. Amazing fretless bass work by Forest.
 
 
<a data-cke-saved-href="http://beyondcreation.bandcamp.com/album/the-aura" href="http://beyondcreation.bandcamp.com/album/the-aura">The Aura by Beyond Creation</a> 
 
Mar 9, 2017 at 5:00 PM Post #30,965 of 42,765
  Im saying it, AKG K612 and Mojo best pairing iv ever heard. Listening to Beyond Creation - The Aura and its amazing, never hear technical death metal sound so good.
 
The speed and completely effortless sound coming to my ears is like nothing iv heard, if you have the headphones that can handle this type of complexity give them a try. Amazing fretless bass work by Forest.

 
That's pretty impressive for barely over a hundred bucks! If I wasn't in "trade thousands of dollars worth of gear for even more four-figure gear" mode I'd buy it. Not sure if it would be able to beat STAX, the HE500, etc., though.
 
By the way, you need to click the Source button on the top left, then paste the Bandcamp code.
 
Mar 9, 2017 at 5:05 PM Post #30,966 of 42,765
   
That's pretty impressive for barely over a hundred bucks! If I wasn't in "trade thousands of dollars worth of gear for even more four-figure gear" mode I'd buy it. Not sure if it would be able to beat STAX, the HE500, etc., though.
 
By the way, you need to click the Source button on the top left, then paste the Bandcamp code.

 
its definitely impressive, i compared K612 / K702 / K712
 
K612 came out on top and better still the cheapest of the 3, i have noticed the mid fi headphones are the most satisfying imo, they have a lot less faults than TOTL.
 
it goes to show that you really dont need to spend tons of cash to get good sound, K612 will go next to HD650 as the best i have heard regardless of price.
 
Mar 9, 2017 at 10:00 PM Post #30,967 of 42,765
Okay. . .so from reading this (and apologies if I'm bringing up old explanations) there is a volume adjustment that is simply adjusting voltage from line out (3V)?  I ask because I got a different color scheme after doing this (Cyan) versus when I was initially adjusting the volume.  Why the difference?
 
Mar 9, 2017 at 10:01 PM Post #30,968 of 42,765
Okay. . .so from reading this (and apologies if I'm bringing up old explanations) there is a volume adjustment that is simply adjusting voltage from line out (3V)?  I ask because I got a different color scheme after doing this (both Cyan) versus when I was initially adjusting the volume (Cyan negative with brown positive).  Why the difference?
 
Quote:
  Detailed information about Mojos volume levels & associated button colours (Click to hide)
 
 
Thanks to GRUMPYOLDGUY for creating the following Mojo-specific spreadsheet:
 
 
 

 
Mar 10, 2017 at 12:47 AM Post #30,971 of 42,765
So I tried the mojo with optical tonight instead of USB and got waaaay better results. Unfortunately the optical out is coming from my Amazon fire box and it's sending a sample rate of 48 instead of 44. Not sure if that will degrade the sound quality or not but the sound all together seems closer to what I was expecting.
 
Mar 10, 2017 at 3:31 AM Post #30,973 of 42,765
   
its definitely impressive, i compared K612 / K702 / K712
 
K612 came out on top and better still the cheapest of the 3, i have noticed the mid fi headphones are the most satisfying imo, they have a lot less faults than TOTL.
 
it goes to show that you really dont need to spend tons of cash to get good sound, K612 will go next to HD650 as the best i have heard regardless of price.


I am starting to feel the same way about the HD-600...have owned 2x HD-800, LCD-XC, Focal Elears, etc
 
Mar 10, 2017 at 3:45 AM Post #30,974 of 42,765
.
 
Mar 10, 2017 at 4:52 AM Post #30,975 of 42,765
I am starting to feel the same way about the HD-600...have owned 2x HD-800, LCD-XC, Focal Elears, etc

 


You'd rate the HD600s above the elears? I'm only asking as my HD600s were bought new for about £80 before the 650s were launched (15 years maybe) and I have started looking longingly at the Elears - happy to hear I should still be happy!
 

Users who are viewing this thread

Back
Top