Originally designed by Young-Bo Electronics of South Korea as a stock IEM for Galaxy S 4, HS330 is Samsung's counter-blow to LG's hugely successful IEM, HSS-F450 aka Quadbeat, which is bundled with their Optimus G.
First, a slit is created at the nozzle. This effectively relieves the air pressure built up in the ear canal, thus yielding airiness.
Second, two acoustic vents optimize the tonal balance of the IEM, by equalizing the air pressure deviation between the frontal cavity and the rear cavity.
CON: Short bandwidth. It seems the IEM is soldered inversely by default, to imbue an aligned phase characteristic to the woofer. However, measurement indicates the tweeter completely dominates the IEM instead.
the collaboration of LG and iSound? I don't honestly think so. Although the dual driver is highly modifiable and can be tweaked to achieve better sound quality, in stock configuration, Quadbeat easily outperforms HS330, hands down.