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Ultrasone PRO-650
Impedance 75 Ω
Efficiency 95.0 dB SPL/mW
Transducer Type Dynamic
Operating Principle Closed
Ear Coupling Over-ear
Discontinued
Target SPL Requirements
Target Power Voltage
90.0 dB 0.32 mW 0.15 Vrms
92.5 dB 0.56 mW 0.21 Vrms
95.0 dB 1.0 mW 0.27 Vrms
97.5 dB 1.8 mW 0.37 Vrms
100.0 dB 3.2 mW 0.49 Vrms
102.5 dB 5.6 mW 0.65 Vrms
105.0 dB 10.0 mW 0.87 Vrms
107.5 dB 17.8 mW 1.15 Vrms
110.0 dB 31.6 mW 1.54 Vrms
Price History
Current Check Price
Highest $325.47
Lowest $299.00
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Popular amps for Ultrasone PRO-650

Model Peak SPL Portable Price
Schiit Magni Schiit Magni 123.2 dB $12.99
Schiit Magni 2 Schiit Magni 2 123.2 dB $5.99
Schiit Magni 3 Schiit Magni 3 124.4 dB $99.00
FiiO Mont Blanc E12 FiiO Mont Blanc E12 120.7 dB $260.00
FiiO E11K / A3 FiiO E11K / A3 115.6 dB $59.99
JDS Labs Objective2 JDS Labs Objective2 119.3 dB $139.00
Schiit Fulla 2 Schiit Fulla 2 116.9 dB $99.00