Pair Headphones with Amps
Compare Headphones
Audiobot Notes
Peak SPL

113.6 dB

This was approximated from the source output at 50 Ω

Damping factor 10.7 and 42.9
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
Search Item
Buy from Sennheiser
Similar Headphones
Sennheiser HD 700
AKG K 702
AKG K 712 Pro
AKG K 7XX
AKG K 612 Pro
Schiit Valhalla 2
Schiit Valhalla 2
Type Tube
Output Impedance 3.5 Ω
14.0 Ω
Power Output 450 mW at 600 Ω
800 mW at 300 Ω
180 mW at 50 Ω
Frequency Range 20 - 20,000 Hz
Portable
Additional Notes
"Triode OTL headphone amp and preamp"
Price History
Current $389.00
Highest $389.00
Lowest
Search Item
Buy from Schiit