600 dollars? I'm not seeing it. Sure they might sound good. But,liquid wood and plastic? Probably made in China. I would say 300 but not 600. There are headphones made out of better materials and just as good of sound for the same or less money.
I'm glad you brought up plastic. With NightHawk I have very intentionally designed these headphones to minimize the use of plastics for three reasons: (1) I don't like the negative environmental impacts of non-renewable, petroleum-based materials such as most plastics (2) there is a good chance an alternative material will perform better acoustically or mechanically (3) I find that plastics can make a product look & feel cheap.
So the vast majority of parts in NightHawk are made from sustainable, recyclable, and/or organic materials. For instance, the earcups are made from wood, the suspension yoke is made from aluminum, the headband is made from stainless steel wrapped in fabric, the headpad is fabric and leather, the speaker diaphragms are made from bacteria-derived cellulose, etc., etc. We were awarded CES' "Best of Innovation" in the Sustainability category for our careful selection of materials and process design in NightHawk's manufacture.
Based on our actual cost to build NightHawk, we could have easily set the retail at double the current price to be in-line with the rest of the headphone market's profit margin structure. In my opinion, NightHawk is an
incredible value. You will only find premium materials and workmanship in its build.
I encourage you to pursue a hands-on demo of NightHawk. The great thing is...we have dealers evenly sprinkled around the globe. I bet you can find someone near you with a demo unit.
http://www.audioquest.com/dealer-locator/