The sound quality of headphones is dependent on many factors. While nothing beats testing out headphones yourself, these specs help provide some clarity.
Impedance and Sensitivity
Impedance and sensitivity go hand in hand and represent the amount of power required to achieve a certain volume level. Lower impedance and higher sensitivities are better with lower power devices such as MP3 players or smartphones. The Sennheiser HD 219s is one such headphone with a slightly lower than average impedance. As such, to avoid damage we do not recommend using it with an amp.
A headphone’s frequency range represents the lowest and highest pitches that it can output. For context, humans can hear between 20 Hz – 20kHz, but most songs stick to the middle of that range. With a closed operating principle and a solid low end frequency response, these headphones can handle a strong bass and would be great for listening to pop or rock music.
The magnet in these headphone speakers are made of neodymium, a very strong permanent magnet used in the majority of headphones.
A headphone’s weight does not correlate to higher quality as some brands purposely add heavier parts. It’s only a matter of what feels better to the listener. So don’t be too quick to judge the Sennheiser HD 219s, which is one of the lightest over-ear headphones.
3.5mm is the most common input for headphones and is what you see connecting with MP3 players, smartphones, and laptops.