Sennheiser HD-25 Aluminum DJ Headphone
Performance On tracks with intense sub-bass content, like the Knife's "Silent Shout," the HD 25 Aluminum behaves as you'd expect a pro-level DJ headphone pair to. It delivers the low-end cleanly and clearly, with no distortion even at top, unsafe listening levels. While there is certainly a serious bass presence, it's not overly exaggerated, and the lows are also matched by highly articulate mids and highs. 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 25 Aluminium has a high impedance which may require an amp for best use. Frequency Response: 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.