Introduced in 2011, JVC HA-FX700 is one of those IEMs made with off-axis driver configuration in order to accommodate a large-diameter micro dynamic transducer.
Although HA-FX700 is equipped with several technical innovations, they all have already been implemented when HA-FX500 was first introduced:
1. A wooden dome
- Minimizing harmonic distortion in the low frequency range, while suppressing the mechanical resonance in the high frequency range.
2. Dual-hybrid structure
- Preventing energy loss due to vibration & stabilizing transient by enclosing the driver in a brass chamber.
3. A wooden housing
- Inducing natural tonality from wood's eigenmodal properties.
motion breakup is effectively reduced. Such oscillation controlling technique has been adapted by various manufacturers, including Beyerdynamic(Varimotion) and Sennheiser(Duofol) as well.
CON: Excursion-induced distortion is quite gross. It is obvious that none of the "innovations" are working the way they are intended to.