 BSR and Garrard, in both build quality and product specifications, were not competitive with professional record changers.Like other mass-produced record changers, the tone arms had heavier vertical tracking force (VTF), poorer speed accuracy rumble specification than the professional record changers.V-M mass-produced record changers, like their competitors' offerings, were used in low- to medium-priced audio equipment - compact systems, console stereos, and portable systems.