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:
Disclaimer: I have no affiliation with this company/project or Kickstarter campaign.
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.