In article ,
Eiron wrote:
Peter Larsen wrote:
Richard Crowley wrote:

C-W were also showing a 12-inch(?) driver which they would
plug directly into the 120V power mains outlet in the hotel room.

Julian Hirsch tested it for stereo review, "the only result was a very loud
noise, no harm to the speaker"

I heard that Bose fitted a light bulb in series with the drivers
(inside the cabinet) to protect them, and to allow the 'mains demo'.
Don't know how true it is though.

The Bose 901 doesn't do the light-bulb trick (although it IS a cool trick
in some ways). However, if you do an impedance plot of the 901, you'll find
it's something like 120 ohms at 60 Hz.

This means if you actually plug it into a 120V line, you get P=V^2/R= 120
watts of power actually going into the speakers, which isn't enough to hurt
them.

That is, what you are demonstrating is mostly how inefficient the speakers
are at low frequencies.....
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."