Amazon Fire 7 Review

[staticV3]

Amazon sells USB OTG/charging splitters, but I don't think they work for Fire Tablets.

You need a tablet with support for USB Power Delivery charging to do simultaneous charging and USB audio output.
If you have one, then you can use a splitter like this.

Here's some charge speed and compatibility testing I did with that splitter.

 

[ClassicGuy]

I use my fire HD8 plus as a remote for my Echo link going into a Schiit Modius and have never used the HP out and have only used the speakers when I am using the screen for video. Still good to know it fails as a DAC and headphone amp though.

I use my Fire HD in a similar capacity. It is used to control Spotify on RPi Volumio, in which case the Fire HD acts as a free LCD screen for song information.

I connect a Bluetooth remote to my Fire HD, which allows me to pause and skip tracks using the remote.

 

[L5730]

Tried the latest trial of Universal Audio Player Pro. Simply won't play any audio to the Topping D10 DAC. Won't even start the transport. Maybe a limitation of the trial, maybe something else.

HiBy player just spits out robot noise garbage, so maybe I have that set to make stuff DSD or something. Just trying to play 16/44.1 and 24/96 FLAC content and it doesn't wanna play ball.

That all said the battery was draining rapidly playing 16/44.1 from Foobar2000 to the D10 anyway, so there is a real limit on the amount of decent audio that this little tablet can actually handle.

It seems it's best used as a controller for something like Volumio running on a RaspberryPi