A link with Re-eq curve... down about 7dB at 20 KHz, with a -3dB point of about 7 KHz. Like turning the treble down a lot

audioholics

M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8