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Audiobot Notes
Peak SPL

125.3 dB

This was approximated from the source output at 150 Ω

Damping factor 463.0
Beyerdynamic DT 1770 PRO
Beyerdynamic DT 1770 PRO
Impedance 250 Ω
Efficiency 102.0 dB SPL/mW
Frequency Response 5 - 40,000 Hz
Transducer Type Dynamic
Operating Principle Closed
Ear Coupling Over-ear
Weight 388 g
Price History
Current $499.00
Highest $599.00
Lowest $499.00
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Similar Headphones
Beyerdynamic T 70
Beyerdynamic DT 770 PRO (250 Ω)
Beyerdynamic DT 150
Beyerdynamic DT 770 M
Beyerdynamic DT 250
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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