The Objective2 (O2) is an open source amplifier focusing on benchmark performance and low cost. Batteries are included which allow portable use as well.
The Mayflower Objective2 portable headphone amplifier will give you fantastic performance in either a desktop or portable setup. Powered either by 2x 9v batteries (included) or external power supply (included) performance well above what its pricetag would suggest. Suitable for powering a very wide range of headphones and punching well above its weight.
Featuring 3.5mm input and 3.5mm output, mains power input and volume control. This unit is 100x108x30mm in size and uses an external power supply to charge/power or a pair of 9V batteries for use on the road.
Australian Power Supply
2x 9v batteries