O2 is an opensource amplifier designed by brilliant engineer NwAvGuy, with emphasis on benchmark performance and low cost. O2 arrives fully assembled, hand tested, and ready to enjoy.
Our Objective2's are assembled 100% in accordance with NwAvGuy's default, high-performance specifications.
Objective2 achieves vanishingly low THD and noise performance for audible perfection.
O2's extremely low output impedance ensures transparent frequency response for all headphone loads.
At over 600mW, Objective2 provides enough output power to drive all dynamic headphones on the market with authority.
Black and Silver Edition: Default configuration, featuring front mounted 3.5mm (1/8") headphone jack, 3.5mm input jack, and AC power jack.
Customize: Choose a 3.5mm or 6.35mm (1/4") headphone jack, front or rear mounted AC power jack, 3.5mm or RCA analog input jack, and custom gain levels. Customized units ship within 1 business day, exclusively in black!
O2 requires an AC adapter to charge its batteries. Power adapters are sold separately, as we ship worldwide. Be sure to select one of the following:
North America: US 15VAC Adapter
Europe, Australia, Great Britain, Singapore: GEZ AC Adapter
Other: Please refer to our O2 Power Adapter Guide