Originally Posted by Deviltooth
I'm really curious about the Music Two. Piotr took a fair amount of time tuning it so I imagine it's going to be very refined. Alas, there's only so much IEM money to be spent so I'll hang back and wait for the flagship; it it trumps my Pro330 I don't think I'll be able to resist.
I imagine a lot of it is trying to get the venting just right. As you know CustomArt is the only company to do vented drivers in silicone, and it goes beyond just boring out a hole behind the vent to let more air expand; the amount of volume displaced actually helps determine how much and where in the bass band the venting helps boost. I imagine he wanted to preserve the extra sub-bass while not boosting the rest of the bass too much. Fine-tuning that stuff is not easy to do! Silicone assembly is already complicated, and using venting just complicates it more --- these IEMs take quite a bit of time to get right.
The AcuPass driver is excellent (which is why so many are already using it, despite being a product that hasn't been released for more than 10 months) and I have confidence that the Music Two will sound excellent! I imagine it will outstrip many expectations of what a dual driver can do --- I've heard a number of demo incarnations of this driver and have been impressed in each case. The only few issues I've had with it is the relative lack of layered texturing in the bass region when the vent is closed (not a problem with the Music Two) and the slightly rough nature of the treble (silicone and the horn design will help in this regard, I imagine). Previously, I'd be considering getting a Pro210, but the Music Two is making me think twice, very hard.