Scott Dorsey 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"

Was any of that noise actually at 60 Hz, though, or was it all 120,
180, etc.?

This is something I read in a borrowed magazine in 1978-ish - do not expect
too much detail, what he tested was whether the subwoofer in question would
survive being connected to a 115 volt outlet as claimed and so it did.

Kind regards

Peter Larsen