i dont have eq7. i have ddm and ck10. i auditioned it once when i had my eterna, a lot of times b4 getting my ck10, and about 3-4 times after. unless it requires burnin, which from what a few people told me so far, results are same. All of the tested units are different unit, since the shop sells them quite fast. all consistently gave me same result, airy bass without substance, and doesnt goes as low as ck10, much less than ddm. when i tried fibass, it does goes very low. its the kind of bass that u only get from ddm (from iem), or very good open cans with very good low end extensions.
one of the tracks i used to compare bass is from shikata akiko's album, haikyo to rakuen, track 3. MARE (Andante molto espressivo). when the bass came in during the intro, it starts very low and goes from sound to vibration. so far out of all iems i tried, only fibass and ddm delivers the sound up until the vibration, most just produce the sound. ck10 can produce the vibration if eq'd more than 5db, but already distorted at that amount.