Very high power audio amplifiers

[pwdrive]

Very big amps are needed to run shaking tables that simulate seismic events. https://en.wikipedia.org/wiki/Earthquake_shaking_table

But you don't typically need much bandwidth

1000W amps are now commodity items. This looks like it can do a genuine continuous 1000W in bridged mode for £175
http://www.maplin.co.uk/p/prosound-2-cha...fier-a94ru

Shaking tables were used at the mines, sometimes I had to repair them (the wooden bits) Wilfley still make them down here:

http://www.holmanwilfley.co.uk/shaking-t...oducts.htm

Lawrence.