i think i’m gonna get a custom iem
To eliminate the “stuffy” ear feeling and stereophonic.
can anyone suggest which custom iem that has similar signature as the 846 ? Especially in the low and mid ?
Custom changes the frequency response of any IEM, and you don't know what the effect will be until it's made (and since it's custom it's difficult to re-sell). Also, it will conform even more closely to your inner ear shape than a universal--which might make it feel even stuffier.
If it were me, I'd get a higher-quality universal and try a bunch of different tips--foam bullets, foam domes, flange, soft silicone, stiffer silicone--for comfort and sound.