PRO: Very nice channel matching for a budget pair. High frequency extension is excellent, resembling that of Ultimate Ears UE700. Due to its linear impedance characteristic, it is almost impossible to alter the sound of VC02 electrically. It is important to note the mid-frequency dip is neutralized once group delay kicks in.
CON: Inverted polarity. Slightly sibilant above 10 kHz, as seen on the CSD plot.
ON SECOND THOUGHT #1: It is quite interesting that the polarity of VC02 is inverted. All of electrodynamic IEMs I've measured so far have never been inverted! It is fortunate this can easily be fixed by simply replugging the driver unit upside down, of which the logo 'VC02' is flipped vertically.
I usually don't measure anything inserted deeper than where the reference plane is located, but it will be an exception this time only.ON SECOND THOUGHT #4: Once VC02 has been inserted past the reference plane, which is approximately located at the 2nd-bend of the external ear canal, VC02's frequency response evens out even further. However, it is critical for users to note that this insertion depth is deeper than that of Etymotic Research ER-4.