Very impressive earphone indeed, with sparkle and balance and projection, and detail. not a basshead iem, but has good bass. best for
light rock, acoustic, jazz and sonorous edm.....comparing to the D3 Superbass, it is more linear and "audiophile" , wheras the D3 Superbass rocks out
like a live JBL system in a club, with you in the third row.

I really like my Idun's, but I was never really happy with the amount of bass, or at least bass impact. Sounds like these might be a good alternative.

These have a little more impact but still not a ton. Wouldn't be a huge improvement over the IDUN in that regard.

Does burn in have any effect on the mid bass. It's a good overall sound but that bass is STRONG at times and can be fatiguing. I find I listen to these at lower volumes than normal. Haven't tried the other filters yet so maybe the treble one will calm it down?