I need to mount a speaker next to a magnetic compass. Any suggestions?
I have a becker radio which comes with a traditional 4 ohm moving coil magnetic speaker. Due to space limitations I don't really have much choice about where to mount it, and it's going to be so close to a compass it's likely to interfere with it. So far my research has suggested that a piezo speaker (no magnet!) is NOT a like-for-like swap.
What are my options? I can't really change the design of the radio, is there a driver-circuit or converter that will allow a piezo speaker to be driven off a radio designed for a moving coil magnetic speaker?
My only other option is embark on physically moving the speaker, which (because it's in an aircraft) will require paperwork (a far more daunting challenge than anything engineering!)
What do others do? - the aircraft is a glider, and most glider pilots use GPS to navigate.