The Mesa/Boogie Rectifier 4x12 is a cabinet used by Prince in the 2000s and 2010s. He had a number of Mesa/Boogie cabinets finished in purple, which were used in different combinations for different sized venues. It was later used with a Soldano Avenger 100 when playing with 3rd Eye Girl.
One of these cabinets is currently on display at Paisley Park.