The JDS Objective2 is an open source headphone amplifier designed by NwAvGuy, with emphasis on benchmark performance and low cost. This item includes a fully assembled and hand tested O2 headphone amplifier, ready for use. You will only need an AC adapter suitable for your region.
The JDS Objective2 has created a stir in Head-Fi.org’s do-it-yourself community. After being banned from Head-Fi for heated discussion, he proceeded to design O2 headphone amp for maximum benchmark performance to prove his points. It’s large and heavy, so hardly worth consideration as a portable amp, however, Objective2 lives up to its name.
Objective2’s are assembled 100% in accordance with NwAvGuy’s default, high-performance bill of materials:
Alps Dual Analog Potentiometer
3.5mm Input and Output Jacks
Dual Gain Switch (2.5x and 6.5x)
Opamps: JRC NJM2068D, 2x JRC NJM4556AD
AC Jack – Rechargeable 9V NiMH Batteries