dear medea: I agree with you, only the user comments "since it was not heard even by the headphones" that's why the comment is otherwise right
God Bless you, Good evening, dear colleagues Martín and Medea, yesterday I did a test by directly placing a speaker to the LYR outputs that come out of the STK and if it has Audio and increases and decreases the volume, but with the audio somewhat distorted that is not clear in the audiò, but when placing the speakers in the back of the equipment and in the headphones there is no audio signal, I thank you again for your suggestion.
I think you already tested the speakers alone on another device, if your speakers are fine, you have a problem with the amplifier stk go with the amplifier go tracking your signal to where the output. The distortion is often by filtering the first thing is that the speakers are heard, from the headphones take the audio signal of any channel and track it following your diagram at some point you can have an open component or open vein ah and check the input of the headset sometimes it acts like a swich and when it doesn't close internally you don't have audio output on the speakers keep commenting