It is generally known that a new pair of headphones must go through a "warming up(aka break-in)" phase for certain period of time before it opens up its true sonic potential. Previously, both electroacoustic and psychoacoustic aspects of a 100 hours-long headphone break-in have been presented with SONY MDR-EX1000, Sennheiser HD650, and Fostex T50RP; The physical transformation is evident, yet its degree is not of a night and day difference, as audiophiles normally describe it.
On Vsonic VC02's cable, a tag, which is written in Chinese, is attached by the manufacturer, openly claiming the dramatic sonic change. The manufacturer states 100 hours of break-in improves the sound quality of VC02.
A brand-new Vsonic VC02 is to be broken-in for 100 hours straight with XLO's break-in sample (100 dB SPL @ peak), driven with an Objective 2 headphone amplifier. Once the headphone is *placed on the occluded ear simulator, its physical placement must remain untouched for the next 100 hours in order to prevent any placement-related deviations. Each 10 times averaged pre break-in & post break-in measurement data are to be compared, and should any type of change occur, they are to be reproduced back utilizing a binaural recording technique to be ABX-compared.
ETC: pre-break in / post-break in
ATTENTION: In order to accurately reproduce these binaural recordings, listeners must use a flat diffuse-field equalized headphone, such as Etymotic Research ER-4B and STAX Lambda PRO with ED-1. The accuracy of the reproduced result can not be guaranteed otherwise. The reference sample is an excerpt from the free hi-resolution sample provided by 2L - the Nordic sound. Downloading below samples is highly recommended for critical listening experience.
Reference sample @ 24-bit / 96 kHz:
A brand-new Vsonic VC02 @ 96 kHz:
A 100 hour broken in Vsonic VC02 @ 96 kHz:
As previously confirmed by others, 1 2 3 4 5 6 , and by myself, 1 2 3 , the physical effect of break-in is quite evident. Moreover, the psychoacoustic aspect of Vsonic VC02's break-in has been demonstrated for ABX comparison so that listeners could verify the audibility of 100 hours of what-so-called 'warming-up'.