There were many producers during the era of tape recorders, such as Sony, Akai, Revox, Teac, Pioneer, Technics, Tesla and many others. These producers usually had several product series', which were different in price and functions. The best ones had digital programmable counters, reverse mechanic, electronic buttons, they could use big reels (such as 26.5 cm). There was also a big selection of tape producers – Maxell, Basf (Emtec), Quantegy, Agfa, etc.