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 429s falls near the average for impedance and would not require an amp for best listening.
The frequency response indicates the range of pitches the headphones can produce. Human hearing range is usually quoted at 20 Hz – 20kHz, with most music falling well within those bounds. 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. Keep this in mind when evaluating the slightly lighter than average Sennheiser HD 429s.
3.5mm is the most common input for headphones and is what you see connecting with MP3 players, smartphones, and laptops.