Hi John,

It is true, the S910 weighs only 11 kg while the KN 7000 weighs 17.6.
But the KN 7000 has 66 Watt speaker output, the S 910, only 24 watts.
Up to 40 people you do not need the KN 7000 amplifier. The microphone you can at KN 7000 "LINE IN or AUX IN " and have enough power. The S910 will need an amplifier and speakers.

[This message has been edited by HarryG (edited 12-20-2010).]