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Audiobot Notes
Peak SPL

119.3 dB

This was approximated from the source output at 150 Ω

Damping factor
Sennheiser HD 650
Sennheiser HD 650
Impedance 320 Ω
Efficiency 98.5 dB SPL/mW
Frequency Response 10 - 39,500 Hz
Transducer Type Dynamic
Operating Principle Open
Ear Coupling Over-ear
Weight 260 g
3rd Party Measurements www.innerfidelity.com
Additional Notes
"Here's a perfect addition to your high-end home entertainment system. Hand-picked components, special acoustic materials and exceptional engineering make these headphones an audiophile's dream."
Price History
Current $319.00
Highest $438.99
Lowest $319.00
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HiFiMAN EF-2A
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Type Tube
Power Output 256 mW at 150 Ω
320 mW at 32 Ω
Frequency Range 20 - 20,000 Hz
Portable
Price History
Current $168.95
Highest $601.25
Lowest $168.95
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