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HD 660S2 Photo
Sennheiser

HD 660S2

Over-earOpen-back

No description provided.

Measurements

6 measurements found.

Specs

Driver type
DynamicSource: Headphones.com · Verified Oct 19, 2026
Sensitivity
98.8 dB/mW104 dB/VSource: Headphones.com · Verified Oct 19, 2026
Impedance
300 ΩSource: Headphones.com · Verified Oct 19, 2026

Power needed

Calculate what source power your headphones will need to operate at their best using Headphones.com's Power Calculator.

ohms
dB

Power Requirements

Voltage (V)
1.99
Current (mA)
6.63
Power (mW)
13.18
Equiv. dB/V
104.03
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