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Audiobot Notes
Peak SPL

111.0 dB

This was approximated from the source output at 50 Ω

Damping factor 150.0
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 $475.69
Highest $700.00
Lowest $475.69
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ALO Audio International+
ALO Audio International+
Type Solid state
Output Impedance 1.0 Ω
Power Output 120 mW at 600 Ω
240 mW at 300 Ω
100 mW at 50 Ω
70 mW at 32 Ω
Frequency Range 5 - 50,000 Hz
Portable
Price History
Current $2,055.67
Highest $2,055.69
Lowest $2,055.67
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