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Audiobot Notes
Peak SPL

117.8 dB

This was approximated from the source output at 120 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 $499.95
Highest $700.00
Lowest $499.95
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Type Tube
Power Output 300 mW at 300 Ω
200 mW at 120 Ω
100 mW at 32 Ω
Frequency Range 20 - 50,000 Hz
Portable
Price History
Current $139.99
Highest $205.99
Lowest $139.99
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