This is refreshing and nice to see, congrats to Kilpsch for asking for feedback and being so transparent and open, this is a win-win situation, happy customers and happy company at the end of the story.
My suggestions for the 999usd open headphone:
Right now, your competition is Focal Elear, because of the build quality.
I didn't hear Elears but suspect they're at the same level of LCD-2, which I really like sonically, but even with the optional carbon fiber headband, they're quite heavy.
Also, LCD-2 has a small soundstage, from what I've read, Elear's soundstage is even smaller.
Something that could totally disrupt this segment, sonically (at least for me), should offer this:
- Big soundstage, but not discontinued or artificially wide like HD-800. Something accurate, "sizeable". I love my Stax SR-007 because of this.
- Even, natural tonality, without frequency aberrations. Something with a very, very fast transient response but relaxed at the same time, not overly bright.
- Deep, punchy bass without bleeding into the midrange.
- Efficient, but no overly efficient. By that I try to say, some of us have amplifiers, and want to take advantage over our investiment. Resuming, not an HE-6, but also not an Edition X in terms of efficiency.
- Good measurements. Costs 999usd, so it has to measure right. Believe me, you don't want those candid debates about "hey, sounds good but 100usd XYZ headphone measures better".
Regarding to build quality and looks of the product, I think you pretty much nailed it, not much to add here.
If I were you, I'll make optional pads, not include them on stock, because it'll add to the cost of the product.
Ditto for the 4 pin XLR cable.
I love black gear, so you should offer it in black too
Those are my suggestions, hope it helps.
Good luck with your products!!!