Ampro Corporation was founded by Axel Monson who was born in Sweden in 1883. He coined the name Ampro from Axel Monson Products. In the early to late 1950's Ampro produced a line of consumer reel tape recorders. Because the company originally produced projectors, the tape recorders were advertised as being able to bring a thrilling new dimension to silent 8mm. and 16mm. motion pictures, as one could record their own sounds and commentaries.
The Ampro Model 730 combines a tape recorder and playback unit. It magnetically records on 1/4" wide tape. It has a dual track, which allows for double the playing time of one. It has a recording speed of 3 3/4" per second. It allowed the user to make recordings from the microphone, or use the radio phonograph adaptor cord to record radio programs. It functioned on a power supply of 105-120 volts, 60 cycles AC.