thank you indeed!
and the guy of my next door also said,relating to this:"Manufacturer's rated output: 50W RMS
Maximum output at onset of clipping: 78.3W @ 0.73% THD (8ohms)
Fidelity firewall output: 72.8W @ 0.06% THD (8ohms)",
"50 w indicated by H.K.exceed 80w of Jap's specification".
Could it be true?