https://export.farnell.com/projects-unlimited/ast-030c0mr-r/loudspeaker-sub-miniature/dp/1192971?ost=100ohm+speaker&cfm=true
UPDATE!
Warning tones are back!
I put the above 100ohm speaker and,finally,I have my tones back,but with much less sound level!Tried to level up the sound on P7 secret menu but with poor essults.
I'm a little disappointed.