The 751 freedom was an excellent monitor introduced around 1993, updated to freedom version in 1998. The 751 was Missions top of the line monitor, replacing the original 761i and original 780. There are later versions of the 780 (and 782?) that failed IMO to capture the midrange of the original Missions.
I still have a pair of 731i for a second system - hard to beat for the price.
I still have a pair of 731i for a second system - hard to beat for the price.