Sennheiser HDC 451 Specifications, Tests and Review

Headphone type
On-ear
Connectivity
Wired
Frequency Response
20 - 18000 Hz
Sensitivity
94 dB
Impedance
270 Ohm

Complete technical specifications, details, expert ratings and review of Sennheiser HDC 451. Find out how your chosen headphones stack up against the competition and whether they are the ones that best meet your expectations with the headphone comparison feature.

DESIGN AND DIMENSIONS Sennheiser HDC 451
Product Type Headphones - wired - 3.5 mm jack
Weight 110 g Better than 69 % of headphones rated.
Colour Black
Body Material Plastic
Recommended Use Portable electronics

The Sennheiser HDC 451 are wired headphones. In the case of studio and professional DJ headphones, a wired connection is a standard and a necessity. In this case, connecting via cable reduces audio transmission delays and prevents unwanted battery drain as it would be in case of wireless headphones. The same is de facto true for gaming headsets. In case of headphones for normal music listening, the cable is rather a relic, although it still has its fans. However, the wireless option is much more popular for everyday use in today’s world.

The headphones are designed as on-ear. On-ear headphones are generally lighter. However, their design has fewer isolation capabilities, and therefore, for example, more sound can be let in and out compared to around-ear headphones. The weight of the headphones is 110 g.

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SOUND QUALITY Sennheiser HDC 451
Headphones Form Factor On-ear
Headphones Technology Dynamic
Connectivity Technology Wired
Active Noise Cancelling Yes Better than 92 % of headphones rated.
Active Noise Cancelling Technology NoiseGard active noise compensation
Sound Output Mode Stereo
Frequency Response 20 - 18000 Hz Worse than 86 % of headphones rated.
Sensitivity 94 dB Worse than 88 % of headphones rated.
Impedance 270 Ohm

The sound quality can be affected by many factors. When it comes to frequency range, the wider it is, the more detail you will hear when listening. However, the range a person can perceive is highly individual. The average person is able to perceive frequencies in the range of 16 to 20 000 Hz. So the most common frequency range you will see on the market is 20 to 20,000 Hz. Lower frequencies up to approximately 256 Hz are considered bass frequencies. Therefore, the lower the bottom value is, the better the headphones will reproduce bass. Conversely, values from approximately 2 048 Hz upwards are treble. That is why headphones with a high upper value will provide a much more accurate reproduction of high notes. Sennheiser HDC 451 offers a frequency range of 20 - 18000 Hz. The sensitivity parameter determines how sensitively the headphones can receive the signal from the source. The higher the sensitivity value, the louder the headphones will be able to play with less power consumption. In general, a higher listening volume also means a higher power load for the connected device. So if you're buying headphones to listen to music from your mobile phone, for example, this is relevant to think about as you don't want to drain your phone's battery too much. Lower values around 85 dB are more suitable for listening in more quiet environments (for example, at home or in the office). Medium values of around 90 dB can provide good listening quality in noisier environments (for example, on public transport or in cafés). Headphones with high sensitivity values of around 100 dB or more are designed for really noisy environments, such as concerts. The Sennheiser HDC 451 has 94 dB.

The device connected to the headphones also plays a role most times. The lower impedance value (approximately 100 to 150 Ohms) is suitable for playback from mobile phones, laptops or other portable players that do not have a powerful enough amplifier. The lower impedance will ensure that the required volume level is achieved with less power, thus extending the life of the player. However, at the same time, with lower impedance, there is more distortion of the sound. Headphones with a higher impedance of around 250 Ohms and above are then more suitable for playback from really powerful signal sources or using a headphone amplifier, otherwise the sound coming out of them might not be loud enough. At the same time, higher-impedance headphones will also ensure less distortion in the sound. In the case of these headphones, the impedance reaches the 270 Ohm value.

For an even more undisturbed listening experience, the headphones have a special Active Noise Canceling feature.

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REMOTE CONTROL Sennheiser HDC 451
Controls On/off
CABLE Sennheiser HDC 451
Cable Type Headphones cable - 2 m
2 x audio adaptor
BATTERY AND CHARGING Sennheiser HDC 451
Battery Type 2 x battery - AA type
Battery Life 80 hour(s) Better than 99 % of headphones rated.

In terms of headphone battery life as a significant factor in the purchase decision, it depends on what you want to use the headphones for and potentially how often you will be able to recharge them. Headphones with up to a few hours of battery life are more suitable for home use as they will require more frequent charging. Headphones with a battery life of around 10 hours or more are already more suitable for commuting and shorter journeys. However, nowadays you can also find headphones on the market that have a battery life in the higher tens to hundreds of hours. In this case, you do not have to worry about your headphones simply running out of power on longer journeys, and you will not have to deal with constant recharging. The battery life of the Sennheiser HDC 451 reaches up to 80 hour(s).

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CONNECTIONS Sennheiser HDC 451
Connector Type Headphones (mini-phone stereo 3.5 mm)
OTHERS Sennheiser HDC 451
Included Accessories Battery case
Service & Support Limited warranty - parts and labour - 2 years

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