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Audiobot Notes
Peak SPL

124.5 dB

This was approximated from the source output at 50 Ω

Damping factor 128.0
Ultrasone PRO-550
Ultrasone PRO-550
Impedance 64 Ω
Efficiency 102.0 dB SPL/mW
Transducer Type Dynamic
Operating Principle Closed
Ear Coupling On-ear
Price History
Current $139.99
Highest $229.95
Lowest $139.99
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Output Impedance 0.5 Ω
Power Output 40 mW at 300 Ω
230 mW at 50 Ω
360 mW at 32 Ω
550 mW at 16 Ω
Frequency Range 20 - 20,000 Hz
Portable
Price History
Current $99.00
Highest $99.00
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