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Impedance 35 Ω
Efficiency 96.0 dB SPL/mW
Transducer Type Dynamic
Operating Principle Closed
Ear Coupling Over-ear
Target SPL Requirements
Target Power Voltage
90.0 dB 0.25 mW 0.09 Vrms
92.5 dB 0.45 mW 0.13 Vrms
95.0 dB 0.79 mW 0.17 Vrms
97.5 dB 1.4 mW 0.22 Vrms
100.0 dB 2.5 mW 0.3 Vrms
102.5 dB 4.5 mW 0.4 Vrms
105.0 dB 7.9 mW 0.53 Vrms
107.5 dB 14.1 mW 0.7 Vrms
110.0 dB 25.1 mW 0.94 Vrms
Price History
Current $219.89
Highest $1,283.59
Lowest $219.89
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Popular amps for Ultrasone HFI-780

Model Peak SPL Portable Price
Schiit Magni 126.4 dB $12.99
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Schiit Fulla 2 121.2 dB $99.00
Schiit Fulla 120.4 dB $59.00
Schiit Magni 3 128.6 dB $99.00
FiiO E11K / A3 119.9 dB $59.99
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