thank you for your compliment. unfortunately, I don't have any other headphone. This is my first headphone.

yes that is what I use.   other hivi tweeter's diaphragm was too small.   planar tweeter have nice straightness.   So if you use other hivi's tweeter your headphone's frequency response is dramatically chaged by position of tweeter   I recommended this product...

oneday, I found planar headphone and planar tweeter have same operation method. It gave me inspiration and convince me that can use to headphone. So, I am searching some planar tweeter in taobao. It's price is only 20~ 35$ for each unit, I think this price is very cheap.     specification...