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Audiobot Notes
Peak SPL

120.0 dB

This was approximated from the source output at 33 Ω

Damping factor 148.1
Beyerdynamic DT 770 PRO (80 Ω)
Beyerdynamic DT 770 PRO (80 Ω)
Impedance 80 Ω
Efficiency 96.0 dB SPL/mW
Frequency Response 5 - 35,000 Hz
Transducer Type Dynamic
Operating Principle Closed
Ear Coupling Over-ear
Weight 270 g
Price History
Current $143.69
Highest $251.18
Lowest $143.69
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Beyerdynamic DT 770 PRO (32 Ω)
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JDS Labs Objective2
JDS Labs Objective2
Type Solid state
Output Impedance 0.54 Ω
Power Output 88 mW at 600 Ω
355 mW at 150 Ω
613 mW at 33 Ω
Frequency Range 20 - 20,000 Hz
Portable
Additional Notes
"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."
Price History
Current $139.00
Highest $412.59
Lowest $139.00
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