Hi,
After some tests, for me the most satisfying solution is the modification of asound.conf.
On the other hand, it substitutes a hard/soft problem under the following conditions:
- when the play/stop button (>||) is pressed the speaker is traversed by a current of approximately 1 A (4 V DC at the terminals of the speaker).
The speaker temperature is more than 70 ° C after 4 hours.
(The kit consumes more energy in pause than in operation) ;)
I have temporarily solved the problem by inserting a blocking capacitor in series with the speaker. (conventional in the amplifiers)
Regards