What Component Am I Missing?

System setup: Naim NDX Streamer v.1 w/XPS, Mcintosh Preamp C2500, Furmans Elite P20i power conditioner, MC501’s, and Lawrence Audio speakers.

I listen to streaming music in bypass mode (C2500) because i like how the music and instruments is upfront and forward, almost like a Class A amp., but lately the music’s sounding a little flat so I experimented a little by connecting Bose 901 VI equalizer :) through the preamps processor loop (w/bypass mode still on), and the sound was sweet, musical, and spacial, but the highs was way too tingy for my ears. Hearing that my system can sound better, what component am i missing? The DAC is from Naim’s streamer!