Has Active Noise Cancellation (Anc)
Master & Dynamic MW65
✓
Sennheiser HD 660S2 ✗
Active noise cancellation uses more advanced technology to reduce unwanted ambient sounds. How it works, it detects and analyzes the sound pattern of incoming noise and then inverts the soundwaves to cancel it out. In simple terms, it's like taking +1 outside (noise from your surrounding) and adding -1 inside (counter sound within the device) to make zero resulting in a reduced level of noise.
Master & Dynamic MW65 allow you to listen at lower volume levels, causing less ear fatigue as you don't have to crank up the volume to overcome background noise.
Has Passive Noise Reduction
Master & Dynamic MW65
✓
Sennheiser HD 660S2 ✓
Passive Noise Cancellation uses well-designed ear cups to seal out unwanted 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 Master & Dynamic MW65 isolates you from ambient noise instead of actively using technology to cancel it out.
Lowest Frequency
Master & Dynamic MW65
20Hz
Sennheiser HD 660S2 8Hz
Low-frequency response measures if and how well a particular audio component 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.
Master & Dynamic MW65's lowest frequency is at 20Hz, this means that
Master & Dynamic MW65 got a juicier bass than the Sennheiser HD 660S2
Highest Frequency
Master & Dynamic MW65
20000Hz
Sennheiser HD 660S2 41500Hz
High frequency response measures if and how well an audio component reproduces high audible frequencies and if it makes any changes to the signal while at it. Sennheiser HD 660S2's highest frequency is at 41500Hz, the higher the high-frequency response, the clearer and crispier the treble.
Master & Dynamic MW65's highest frequency is at 20000Hz, this implies that
Sennheiser HD 660S2 got a clearer and crispier treble than the Master & Dynamic MW65
Sound Pressure Level
Master & Dynamic MW65
✗
Sennheiser HD 660S2 104dB/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 a way of getting 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.
Driver Unit Size
Master & Dynamic MW65
40mm
Sennheiser HD 660S2 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.
Master & Dynamic MW65 driver unit is 40mm in diameter,
making them have a larger driver unit than that of Sennheiser HD 660S2 by 2mm
, many people have a misconception that driver units of a bigger size automatically produce better sound quality.
However, large drivers usually have difficulty reproducing high frequencies so yeah, larger drivers are capable of generating louder sound, but this does not mean that they produce better sound.
Impedance
Master & Dynamic MW65
32Ohms
Sennheiser HD 660S2 300Ohms
Defined as the device's resistance to the electromagnetic current, when electricity flows through a wire, it experiences electrical resistance that counters the flow of current. The resistance of a conductor 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.
Master & Dynamic MW65's impedance is 32Ohms. The impedance of earbuds is the electrical resistance of the driver unit present on the inside.
Has A Neodymium Magnet
Master & Dynamic MW65
✓
Sennheiser HD 660S2 ✗
Neodymium magnets if used in audio devices produce a higher sensitivity and substantial sound output using less power to do so. They can help produce music at quite a high sound pressure level, SPL, with the use of high magnetic flux. The Master & Dynamic MW65 have this type of magnet.
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