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Audiobot Notes
Peak SPL

120.9 dB

This was approximated from the source output at 120 Ω

Damping factor 15.0
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
Output Impedance 10.0 Ω
Power Output 150 mW at 300 Ω
400 mW at 120 Ω
1,000 mW at 32 Ω
Frequency Range 20 - 20,000 Hz
Portable
Price History
Current $219.00
Highest $250.00
Lowest $219.00
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