The noise is quite loud to hear the operation with headphones, even if the volume to zero "turns" with the left button.
The connection with the jack is quite shaky. Apparently, you can not insert the plug deeply enough, the edge of the plug abuts's case before he is right there. This also applies for the supplied jack to RCA cable.
Well, I wanted to Audio Adapter indeed connect to my HiFi stereo system, and are not using the headphones. So have the adapter with a cable that has RCA plugs on both sides, with the controller connected. Here you can minimize the problem with the sound by turning up the volume full on both the smartphone and the adapter, and the desired volume ultimately adjusts the amplifier.
Only appears when operating with the hi-fi system, another defect: When I press "pause" on the smartphone, it begins in the speakers after a few seconds to hum quite loudly. In continuation of the hum is gone. Even with another power supply changes because nothing. By chance I discovered that this effect disappears when I also connect a headset to the adapter. The audio output appear to be loaded. And you have the problem again with the rickety jack connection. Thereafter, however, is still to hear a "pop" when the adapter apparently shuts down its output in a pause.
Why is this good, is a mystery to me, the low power saving, in a device that is not fed by batteries, not be the reason.
Conclusion: with the described workarounds allows the adapter to a stereo system to operate, the sound is good, the true hit is so not that popping still remains, and only as a hobbyist you can incorporate load resistors in the RCA cable. Nevertheless, I keep the unit in which the price is not worth Exchange, and who knows what awaits me with another adapter ...
