This is what is absolutely killing it for me. The timbre of earbuds sounds so natural compared to all the IEMs I have. Only my HD650 can reproduce that natural timbre I am looking for.I don´t have Chaconne, perhaps one day..... but I totally agree with you about earbuds.
I owned a lot of TIER iems and the timbre on earbuds is better by far for my tastes, no matter the issolation for me.
The way they reproduce the resonance of instruments and vocals is amazing and out of all the technical attributes of listening equipment I have found that the correct sounding timbre is what I appreciate the most.