I have +/- 90 Volt rails.
This is more like it:I think you need higher voltage rating than 100V
https://www.mouser.com/ProductDetail/Infineon-Technologies/IPB017N10N5LFATMA1?qs=sGAEpiMZZMshyDBzk1%...
100V, 180 amps, 1.5mohms (almost lower than the speaker wire itself), about 80 nanosecond turn off time (increase that becoz of inductive speaker load) and only about 8 bucks a piece.
http://www.geofex.com/Article_Folders/ampprot/dcprot.htm