Has Passive Noise Reduction
Sennheiser HD 660S2
✓
Sennheiser HD 560S ✓
Passive Noise Cancellation uses well-designed ear cups to seal out environment noise. This is used for both in-ear earphones and over-ear headphones where the headphone itself will keep surrounding noise out.
The Sennheiser HD 660S2 sits tightly in place, creating an acoustic seal that reduces background noise and prevents your music from leaking out.
Both of these devices have passive noise reduction which means that also the Sennheiser HD 560S isolates you from ambient noise instead of actively using technology to cancel it out.
Lowest Frequency
Sennheiser HD 660S2
8Hz
Sennheiser HD 560S 6Hz
Low-frequency response measures if and how well an audio device reproduces low audible frequencies and if it makes any changes to the signal on the way through. Sennheiser HD 660S2's lowest frequency is at 8Hz, the lower the low-frequency response, the stronger and juicier the bass.
Sennheiser HD 560S's lowest frequency is at 6Hz, this means that
Sennheiser HD 660S2 got a juicier bass than the Sennheiser HD 560S
Highest Frequency
Sennheiser HD 660S2
41500Hz
Sennheiser HD 560S 38000Hz
High frequency response measures if and how well a particular audio component reproduces high audible frequencies and if it makes any changes to the signal on the way through. Sennheiser HD 660S2's highest frequency is at 41500Hz, the higher the high-frequency response, the clearer and crispier the treble.
Sennheiser HD 560S's highest frequency is at 38000Hz, this means that
Sennheiser HD 660S2 got a clearer and crispier treble than the Sennheiser HD 560S
Sound Pressure Level
Sennheiser HD 660S2
104dB/mW
Sennheiser HD 560S 110dB/mW
Sound pressure is the average variation in atmospheric pressure caused by the sound, the sound level .i.e how loud something is can be perceived differently by different people so we need to have the means to get an objective measurement of sound level expressed in numerical terms.
The sound pressure level, SPL, is the pressure level of a sound, measured in decibels, dB, Sennheiser HD 660S2's measurement is 104dB/mW. Devices with a higher sound pressure level are generally louder when supplied with any given audio source.
Sennheiser HD 560S's sound pressure level measurement is 110dB/mW.
Driver Unit Size
Sennheiser HD 660S2
38mm
Sennheiser HD 560S 38mm
The driver unit is the component that produces sound in the device, its size dictates the loudness of the headphone. Sennheiser HD 660S2 driver unit is 38mm in diameter, bigger drivers are more powerful and can produce better bass.
Sennheiser HD 560S driver unit is 38mm in diameter,
making both Sennheiser HD 560S, and Sennheiser HD 660S2 similar in how loud their sound gets
, as many tend to believe that driver units of a bigger size automatically produce better sound quality.
However, large drivers usually have difficulty reproducing high frequencies so yes, larger drivers can generate louder sound, but this does not mean that they deliver better sound.
Impedance
Sennheiser HD 660S2
300Ohms
Sennheiser HD 560S 120Ohms
Defined as the device's resistance to the electromagnetic current, as electricity flows through a wire, it faces electrical resistance that counters the flow of current. The resistance of a wire is measured in ohms. Sennheiser HD 660S2's impedance is 300Ohms, the lower the impedance, the easier it is to get higher volume and requires less power.
Sennheiser HD 560S's impedance is 120Ohms. The impedance of earbuds is the electrical resistance of the driver unit present on the inside.
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