My HeavenS's have arrived. Had to wait for Dimitri to order direct from the factory. Will post more thoughts after the weekend but initial thoughts are that they fulfill what I was hoping they would do which is to give me an ER4S with more bass, soundstage and warmth. Bass is nice and tight, deep and no sign of bloat or artificial boost. I would say detail retrieval is actually better than the ER4S, something I never thought would happen!
So far the only negative is the cable is much more microphonic than the ETY's so I will have to keep still which I do anyway when listening. The housings are made from "shaved" brass and are weighty but once in the ears (they go deep, like the ETY's ) they are planted solidly. I found the medium tips to be the best fit for me. These are to all intents and purpose fit and forget IEM's. I think they have a tubey sound to them and all one focuses on is the music which is what it is all about eh!
Build quality is great, the cable (microphonics aside) is very well made, about the same width as dried linguini!
So, initial impressions are that if you love the ETY ER4S but wish it had more warmth and bass presence but not overbearing bass you may want to give these a go.
I love that it is a single driver, every multi driver iem I have tried sounds muddy and bloated. I like the idea of keeping it simple.
One last thing, unlike others I do notice a difference in sound if I put my fingers over the rear ports, the soundstage closes in (Oh yes, soundstage is the best i have heard on a monitor earphone!) and the sound lacks air.
Will write more after more listening but I think these are now my go to IEM!