The Lecson AP1 AP2 AP3 power amps.
http://groups.google.com/group/lecson-audio
I had an AC1 and AP3 over 20 years ago.
I remember bringing them back to Australia (bought them while on holiday in England).
I had the AP3 (round cylinder) in my hand luggage.
Going thru customs in Amsterdam they saw it and took it out.
They had no idea what it was and they did not understand english too well.
Eventualy they took it off me to show the pilot so he could give approval to take it on the plane.
Whilst on the plane, the teenage girl and her mum who were sitting behind me recognised me from the above discussion with the airport staff.
We got to speaking and I told them what the item was.
They told me that when they saw me, they thought 'Oh my god, the man with the bomb is on our plane'