They managed to squeeze a hell of a lot out of 1 BA driver. That takes a lot of tuning and design.
With multi drivers you have crossovers to worry about as well.
The VI are not bang for buck iems, but for what they are, they are truely spectacular.
The bass on this has the same impact as a dynamic driver. That is truly a first for me from a balanced armature type driver. I know they are not really a balanced armature driver and I honestly do not know how they work but the impact is dynamic driver like.
Apparently the Musical Fidelity EB-50 is a single BA earphone that has bass that rivals the heaven VI, but is a balanced sound over the VI's lush coloration.
Thx for the advice..actually my mdr ex 1000 are 'broken' by my own stupid mistake.i did burn in with white noise that the sound can be heard at 2 meter away..imagine how loud it is..then after some 30 min when i listen the earphone again the sound goes WTF!!..it sounded dull,dynamic are gone,no more 3D imaging just plain 2D and really not enjoyable as before.Initially i want to do the burn in because i was annoyed by the ear piercing sibilance and a slight L and R imbalance.after the 'burn in' procedure the sibilance are reduced,the L and R imbalance gone but the overall sound becomes mudded.i was so depressed for several days after i hear the sound becomes like that as its an expensive IEM and i just 'destroyed' it no more than 2 weeks after i bought it.i think the driver inside the phone are mulfunction.right now i dont dare to make burn in using white noise or something like that..i just let the burn in happened naturally when listening to my phone.
I tend to use Nellyville when I want to break something in quickly. Lots of energy but also conversation breaks to allow a rest and the coils to cool back down. Still give things an hour rest every 8 hours or so. Using something undynamic and sustained like pink noise or sweeps is a recipe for disaster.
Musica Acoustics sells them for $548 complete, and the website makes the purchase process pretty easy.