Ciao Gianni and THANKS for the answer

You mean keeping CLEAR pressed and switch the speaker on?
Yes. It looks the speaker 'senses' the command since it does not light up the display until I release the key... but at the end it remains in Test mode.



Mauro
HT-audio: G91A, 518, DSP5000, DSP5000C, DSP5000, Kef PSW4000, MacMini
Low SPL System: G68J, 558.2, Samsung HD950, Quad 2905 (LCR), ESL63 (rear)
Vintage System: 201, 207, 263, 204, M60.2