What about the Soundcraftsman equalizer to ameliorate those nasty frequencies? Remember that product? The more bands you got, the cheaper the unit. Somehow, these went out of fashion.
Believe it or not, I lived thru the 70's with a pair of Quad ESLs, tube amp and ARC SP-3a-1 preamp, using a (then cutting edge, no pun) Panasonic SP-10 DD Turntable on a Music & Sound 'plinth.' This system replaced a Phase Linear 700, driving stacked Advents, and definitely made more music, at far lower dbs.
Believe it or not, I lived thru the 70's with a pair of Quad ESLs, tube amp and ARC SP-3a-1 preamp, using a (then cutting edge, no pun) Panasonic SP-10 DD Turntable on a Music & Sound 'plinth.' This system replaced a Phase Linear 700, driving stacked Advents, and definitely made more music, at far lower dbs.