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Audiobot Notes
Peak SPL

110.9 dB

This was approximated from the source output at 56 Ω

Damping factor
Sennheiser HD 660 S
Sennheiser HD 660 S
Impedance 150 Ω
Efficiency 95.8 dB SPL/mW
Frequency Response 10 - 41,000 Hz
Transducer Type Dynamic
Operating Principle Open
Ear Coupling Over-ear
Weight 260 g
Price History
Current $489.99
Highest $700.00
Lowest $489.99
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Power Output 19 mW at 600 Ω
36 mW at 300 Ω
86 mW at 56 Ω
82 mW at 32 Ω
60 mW at 16 Ω
34 mW at 12 Ω
Frequency Range 20 - 20,000 Hz
Portable
Price History
Current $242.00
Highest $485.46
Lowest $242.00
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