Chord Mojo(1) DAC-amp ☆★►FAQ in 3rd post!◄★☆
Oct 11, 2016 at 10:59 PM Post #23,956 of 42,765
 
I'm not disputing what you're saying, I'm just trying to understand it.

So if 5.3Vrms is at +18dB, then -4.5dBV is approximately the reference. So -70dB is -74.5dBV or roughly 189uVrms. Much more reasonable numbers.

Here's what I'm not sure I understand correctly now, so please check me on this...

From -70 (-74.5dBV approx) to -34 (-38.5dBV approx) it's half dB steps? (2 steps per color change, assuming color change = 1dB)

Then from -34 (-38.5dBV approx) to +2 (-2.5dBV approx) colors change together... So 2dB steps?

Then from +2 (-2.5dBV approx) to +18 (14.5dBV approx) it's 1dB steps? (taken verbatim)

So if I wanted a roughly -10dBV output, I would start at the max volume and click down 16 times to get to about -2.5dBV then 4 more clicks to approximately -10.5dBV.

If I take into account power conditions, maybe I want to aim one click higher and stop at -8.5dBV nominal? Is a 1.5dB drop a reasonable expectation? How stable will that level be?


Yes, I believe the steps are in 1/2 dB increments up to -34, but after -34 it's 1 step per increment, and after +2 it's 2 steps (not sure on this though). I am not the authority on the measurements or implementation. You are asking for figures that I am not qualified to answer accurately, but hopefully I can help point you in the right direction. @Rob Watts.

I do believe he's mentioned the power is very stable throughout the power level, but again, I have no data on this.

Just for accuracy - a change in volume is always in +/- 1dB steps.
 
Rob
 
Oct 11, 2016 at 11:37 PM Post #23,957 of 42,765
Just for accuracy - a change in volume is always in +/- 1dB steps.

Rob


Ah, so it's simply a visual guide for the two step colour changes on the lower and upper portions. Thanks Rob!
 
Oct 12, 2016 at 3:20 AM Post #23,958 of 42,765
IMO, some say it's weak because they prefer a bright amp + warm headphone (HD650) than a warm analog out of Mojo + warm headphone. Double warm = too polite IMO, but YMMV. BTW, Mojo has enough power to make the HD650 sing, but the synergy varies by people's opinion.


Did you even try the Mojo + HD 650? Because that is not how the HD 650 sounds like on the Mojo.
 
Oct 12, 2016 at 4:32 AM Post #23,959 of 42,765
Anyone using the Samsung Galaxy Note 7 smartphone should know about this potential battery problem!!!
eek.gif
 
 
 
http://www.irishtimes.com/business/technology/samsung-warns-note-7-owners-stop-using-your-phone-1.2824998
 

 
Oct 12, 2016 at 4:37 AM Post #23,960 of 42,765
  Just for accuracy - a change in volume is always in +/- 1dB steps.
 
Rob


For sake of accuracy too, may we have the range in dB ?
Up to now it has been commonly written from -70dB up to +18dB.
 
Fact is that Mojo allows something like 96 different levels ( 95 clicks).
Fact is each change is always +/- 1dB ( measured).
 
But range provided in threads or reviews is not matching (-70dB up +18dB is 88dB or 88steps)
Thanks.
 
Oct 12, 2016 at 4:52 AM Post #23,961 of 42,765
For those interested Mimouille has posted what his Shanling M1 looks like stacked with the Mojo.
Dang that's small!

http://www.head-fi.org/t/633511/pictures-of-your-portable-rig-part-xvi/21435#post_12928345



Pic courtesy of Mimouille.
 
Oct 12, 2016 at 6:59 AM Post #23,964 of 42,765
seems m1 is a bit too small to stack with mojo. rubber  bands may slip out of m1 and using double sided tape may leave marks on mojo's and m1's  surface. however if the sound via usb of m1 can beat coaxial of fiio x3 ii, m1 may be well worth. 
 
Oct 12, 2016 at 7:55 AM Post #23,965 of 42,765
This one wirks really well connecting Mojo to phone.

http://www.jaben.com.hk/?product=adl-otg-mb

 
Oct 12, 2016 at 8:41 AM Post #23,967 of 42,765
Oct 12, 2016 at 10:08 AM Post #23,969 of 42,765
Those of you using the fiio x3ii with mojo via coaxial how is the sound compared to other sources you've used/tried before ?. Planning to get one to pair with my mojo as it's the only dap which is cheap enough to use as source . I'm not planning to use my cell phone all the time as I can't afford to have it on air plane mode to avoid interference.
 

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