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Audiobot Notes
Peak SPL

117.0 dB

This was approximated from the source output at 32 Ω

Damping factor
Superlux HD-668B
Impedance 56 Ω
Efficiency 98.0 dB SPL/mW
Frequency Response 10 - 30,000 Hz
Transducer Type Dynamic
Operating Principle Open
Ear Coupling Over-ear
Price History
Current $42.95
Highest $69.99
Lowest $42.95
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Similar Headphones
Superlux HD-681
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Power Output 140 mW at 32 Ω
Frequency Range 20 - 20,000 Hz
Portable
Price History
Current $145.98
Highest $149.00
Lowest $145.98
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