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Audiobot Notes
Peak SPL

139.4 dB

Damping factor 106.7
Polk UltraFocus 8000
Polk UltraFocus 8000
Impedance 32 Ω
Efficiency 110.0 dB SPL/mW
Frequency Response 8 - 28,000 Hz
Transducer Type Dynamic
Operating Principle Closed
Ear Coupling On-ear
Additional Notes
Active noise cancellation
Price History
Current $350.00
Highest $582.59
Lowest $350.00
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FiiO Mont Blanc E12
Output Impedance 0.3 Ω
Power Output 160 mW at 300 Ω
880 mW at 32 Ω
600 mW at 16 Ω
Frequency Range 20 - 20,000 Hz
Portable
Price History
Current $260.00
Highest $483.14
Lowest $260.00
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