The Boostaroo Revolution is a headphone amp that doubles as a splitter. It has a 5.5 Ohm impedance and can drive both channels at 32 mW. The Revolution can produce gains from 11 – 11.5-decibels in headphones with 300 Ohms.
The Revolution uses two AAAA and can achieve about 22 hours of battery life. It will work on any device with a with a standard headphone jack. You can get the Revolution in white or black for $49.99 and if you buy it before Dec. 1, Boostaroo will throw in two pairs of volume control headphones.