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Review: Apple vs Google USB-C Headphone Adapters
- Thread starter amirm
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OP
- Thread Starter
- #82
I can run that but we need to decide what load resistance to test with.
OP
- Thread Starter
- #84
Certainly not all of it. 
I have to install and drive each one separately and then measure power. It is a lot of work to run a full matrix. I can do one value so you all pick one. Maybe it will be representative of the rest.
I have to install and drive each one separately and then measure power. It is a lot of work to run a full matrix. I can do one value so you all pick one. Maybe it will be representative of the rest.
32 is probably more real-world indicative compared to 300, but if there were two reference loads maybe you can determine quiescent power draw as well.
Personally, I would give up a little SNR for half the power consumption on the go, so this information would be really useful to know.
Personally, I would give up a little SNR for half the power consumption on the go, so this information would be really useful to know.
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Yes for on the go phones I'd say 32 ohms is a good choice.
I think the easiest would be to try to get ahold of an iphone and then just drive it as a Roon endpoint as someone else suggested. I've gotten that to work with mine, but I don't have an audio analyzer...
OP
- Thread Starter
- #89
Sounds good and will do....
vert
Senior Member
So I got to test the Apple dongle on Android with USB Audio Player Pro. It doesn't work, UAPP doesn't recognize it and only electronic noise is heard. First time the UAPP driver failed me, had so far it had worked flawlessly with two DACs and two USB mics.
The dongle worked fine, sounding very good, I would say a bit better than the headphone out, with the default Android driver, but volume was reduced by 20-25% compared to an already not very powerful output on my Xperia phone, so it isn't going to be very useful.
Recently upgraded my iPhone SE (which has a conventional headphone jack) to the iPhone 8 Plus which of course uses the lightning jack for headphone use. The lightning dongle works great with my 22 ohm Etymotic ER3SE earphones. Guess I can still use the Topping NX4 DSD with my 6th gen iPad and its headphone jack...
note the lightning dongle was tested here:
https://www.kenrockwell.com/apple/lightning-adapter-audio-quality.htm
note the lightning dongle was tested here:
https://www.kenrockwell.com/apple/lightning-adapter-audio-quality.htm
Uh......
USB 3 CCK + USB-A to USB 2.0 Micro-B cable means you can still use the DAC of the NX4 as well with your iPad.
That's because the standard is anything but ...
The standard is fine. There are 2 options for audio through USB-C socket. One is analog(separate pins for that) and digital audio as usual. Not all smartphones support both of them.
Indeed, but the standard doesn't include a way for the consumer to identify what option has been implemented, other than trial and error after the purchase.
Lightening dongle performs similarly compared to the USB-C. The chips they use are different, but this is due to different port logic (usb-c vs lightening). The audio pipelines are similar.
On the other hand, iPhones with a headphone jack (such as my iPhone 5C) performs even better than the dongles. but with SINAD better than -100db, it's already fully transparent, and you won't hear the difference between the two.
On the other hand, iPhones with a headphone jack (such as my iPhone 5C) performs even better than the dongles. but with SINAD better than -100db, it's already fully transparent, and you won't hear the difference between the two.
I have just bought a DAP again. My Sony smartphone won't last forever and I am resigned to the fact that when it needs to be replaced whatever comes next probably won't have a headphone jack. My work issue IPhone 8 has a dongle and it's a pain in the backside. I had an old Pioneer DAP but when I dusted it off and charged it up the screen had died. I saw a dealer off loading the Shanling m3s and bought one. Very nicely made, compact device and the volume goes way higher than my Sony smartphone. However its a bit of a backwards step really.
Archimago also measured it: http://archimago.blogspot.com/2018/01/measurements-apples-lightning-to-35mm.html
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