Concertone Reel to Reel Tape Recorders

American Concertone was started by  Bert Berlant  and his Concertone machines were sold under both names. The top model 607 was one of a few US machines that could give the Ampex 351 real competition.

In 1962 American Astro-Systems, an Aerospace firm in South El Monte, CA bought Concertone from Berlant and began to manufacture the subassembly of the Model 505 in Japan by Teac. Final assembly and QC was done in South El Monte and Culver City CA.
In 1965 all the US operations were moved to South El Monte, where they began development of an automatic tape reversing mechanism for bi-directional 4 track playback. This asymmetrical capstan drive designed by Deiter Brandt and Richard Schullenberg was first used in the American Concertone 800 Reverse-O-Matic. Al Solfe was Concertone’s chief engineer.
Apparently Berlant left the company in 1963 and Arne L. Berg and Kenneth M. Williamson ran the company.

The Concertone 605 was a great prosumer recorder with new front shielded 2 and 4 track heads in a removable head assembly with full remote control developed by Al Solfe. This recorder had full pro specs and was a quality recorder. It was later sold under the Concord brand and TEAC as the R2000.

It seems Concertone also had a relationship with another Japanese company, Dokorder but not much is known about that.

The above information is a compilation of what can be seen on the fine Museum of magnetic sound recording website