Home-brewed Theremins ... and other strange devices

Realton 'Variophon Standard' Speaker

Note: Research of the Variophon Standard has been stopped due to leak of time in 2014.


The Variophon uses a dual speaker chassis.

The presented unit has been stored in a humid environment for many years. The plywood completely started to decompose because of mildew and could not be re-used. The speakers corroded and both membranes were rotten. The speakers had to be replaced.