HD 25 SP / HD 25 SP-1

Closed, dynamic headphone for use as monitor headphone in professional studios, for cutting and during outdoor recordings.

FEATURES

Extremely lightweight headphone for long monitoring

Good screening against ambient noise, thus high feedback rejection in the studio

High maximum sound pressure level

Various connections possible due to a nominal impedance of 85

Sturdy, pluggable cable, exchangeable

Neodymium magnet systems with high efficiency, lightweight AlCu coil wire for good transient response

Spare parts available for a period of ten years after purchase

TECHNICAL DATA

Frequency response

30-16,000 Hz

Acoustic principle

dynamic, closed

Nominal impedance

85

Sound pressure level

100 dB

Max. sound pressure level

120 dB

Power handling capacity

0.2 W as per DIN 45580

THD

 

0.4 %

Coupling to the ears

supraaural

Headband pressure

ca. 3 N

Weight without cable

115 g

Cable

 

3 m

Plug

HD 25 SP:

6.3 mm ø stereo phone plug

 

HD 25 SP-1:

3.5 / 6.3 mm ø stereo phone plug

Subject to alterations

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Sennheiser HD 25 SP / -1 manual Features, Technical Data, Subject to alterations

HD 25 SP / -1 specifications

The Sennheiser HD 25 SP and HD 25 SP-1 headphones have earned a prominent place in the audio industry, particularly among professional users in fields like broadcasting, studio monitoring, and live sound environments. Designed for high performance, these headphones are known for their durability, portability, and outstanding sound quality.

One of the standout features of the HD 25 SP series is its lightweight design. Weighing in at just a few hundred grams, these headphones can be worn for extended periods without causing discomfort. The earcups are constructed from high-quality materials that provide an effective seal around the ears, which is essential for monitoring purposes and helps in isolating background noise.

Sound quality is where the HD 25 SP series truly shines. They are equipped with dynamic transducers that deliver a clear and powerful sound signature. The bass response is particularly impressive, making these headphones an excellent choice for music genres requiring deep bass. Additionally, the closed-back design ensures minimal sound leakage, allowing users to concentrate fully on their audio without distractions.

The HD 25 SP headphones also feature a rugged and robust build quality, making them well-suited for the rigors of professional use. The reinforced headband and durable earcups can withstand the wear and tear of daily use, ensuring longevity. Furthermore, the single-sided cable design adds to the convenience, allowing for easy movement without tangling.

Another innovative aspect of the HD 25 SP series is their foldable design, which enhances portability. Users can easily store the headphones in a bag or backpack, making them ideal for on-the-go professionals. The swiveling earcup mechanism also allows for one-ear listening, a valuable feature for DJs and sound engineers who need to monitor audio tracks while staying aware of their surroundings.

In terms of technologies, the HD 25 SP headphones are characterized by a high sensitivity level, allowing them to achieve loud sound levels without distortion. This makes them particularly effective in high-noise environments such as clubs or outdoor events.

Overall, the Sennheiser HD 25 SP and HD 25 SP-1 headphones stand out due to their combination of portability, robust design, and superior sound quality. They continue to be a preferred choice for audio professionals who demand reliability and performance in their monitoring tools. Whether used in a studio or at a live event, the HD 25 SP series remains an iconic product in the world of professional audio.