For me, the ER4S isn't about hearing new things, it's about not hearing all the extra stuff that other earphones introduce. Treble spikes. Mid-bass bloat. Colored mids.The ER4S offers a pretty unbiased take on sound compared to mostly everything out there imo. Of course everyone has their preferences, but imo it's the lack of major flaws that make the ER4S great, not any sonic enhancements it might bring.