I originally purchased the HS-1A when I was still on Bethel Island in East Contra Costa, CA, USA, as a test item; 50mm transducers were an up-and-coming item at the time. Sound proved a little better than the Plantronics® GAMECOM® 380 that would supersede them. The sound went bad, however, after only three months; when I opened the right earcup to investigate, I found much to my shock that all conductors in the harness are at best 30 AWG. Needless to say, repair was impossible with the tools I had at the time, and the earcup's lack of available space precluded the major cable upgrade necessary to return the HS-1A to service. Disposition: Scrapped.
As of 21 August 2016 I am still on the hunt for a headset for the ASUS® XONAR® STX, and the HS-1A is clearly a did-not-start; although some might recommend one of the Sennheiser® PC-Series gaming headsets, my cable construction requirements are not currently satisfied by any computer manufacturer and I may end up getting a Heil Sound™ Pro Set™ Media Pro™ despite questions about the earphone response, as it is one of the few computer headsets that ship with a full-on radio-grade harness (4 x 20 AWG-cored coaxial cables) with dual 3.5mm TRS plugs.
As of 21 August 2016 I am still on the hunt for a headset for the ASUS® XONAR® STX, and the HS-1A is clearly a did-not-start; although some might recommend one of the Sennheiser® PC-Series gaming headsets, my cable construction requirements are not currently satisfied by any computer manufacturer and I may end up getting a Heil Sound™ Pro Set™ Media Pro™ despite questions about the earphone response, as it is one of the few computer headsets that ship with a full-on radio-grade harness (4 x 20 AWG-cored coaxial cables) with dual 3.5mm TRS plugs.