 This arrangement expired when IVC in California ceased operations, at which time all sales and marketing was taken over by IVC UK who had substantial 9000 inventory and were therefore able to continue to supply and support the PAL and SECAM markets.The 9000 was used for the production of many popular television series from the mid 1970s to the early 1980s, as it was capable of higher quality through many more generations than other available products.It was extensively used in mastering and duplication centres where high quality coupled with long head life and low tape wear were important.