Originally Posted by Jazzyfi
Does it sound better than TP? AK100 has larger output impedance than TP. A bit weird if Miracles sounds better with AK100 than with TP.
No I still prefer the overall TP sound sig, but they are very different. The AK100 has more punch but the Tera sounds much more liquid and natural. The TP sounds wonderful with the Miracles, but has no deep bass AT ALL. So depending on the track you could notice the problem or not.
The AK100 drives the Miracles without any problem to my ears, which shows that it is not the output impedance that is the problem on the Miracles with the Tera, but like James444 said:
"Capacitors in the output stage: The TP has been reported to having capacitors in the output stage and not being able to drive phones < 50ohms properly. The result is bass roll-off, which gets gradually worse with lower impedance. Note that this affects all types of IEMs, dynamic drivers as well as BAs. For instance, the 16ohms IE800 show a substantial reduction in bass when driven from the TP."