Just came across this - the Natus One, a wireless receiver/headphone amp and transmitter combo currently up on Kickstarter. Looks like it could be a good alternative to the current crop of Bluetooth headphone amps. Highlights: Lossless wireless audio transmission in the 2.4ghz band (not Bluetooth); includes both receiver and transmitter Low latency (16ms; lower than Bluetooth) Designed to drive 30-80ohm headphones 30+ foot range 1000mAh battery, 24 hour battery life at 80% volume Aluminum construction Project leader is the CTO of SteelSeries Disclaimer: I have no affiliation with this company/project or Kickstarter campaign.