Get the key specs, technical data, ratings and full review of Poly - Plantronics M 145 all in one place. Compare your selected model with other alternatives and give your decision on the best headphones a solid base with our comprehensive overview.
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DESIGN AND DIMENSIONS Poly - Plantronics M 145 |
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Product Type | Headset - wired | |
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Colour | Metallic silver | |
Recommended Use | Portable electronics |
The Poly - Plantronics M 145 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.
Show moreSOUND QUALITY Poly - Plantronics M 145 |
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Headphones Form Factor | Over-the-ear mount | |
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Headphones Technology | Dynamic | |
Connectivity Technology | Wired | |
Sound Output Mode | Mono | |
Frequency Response | 300 - 3300 Hz | Worse than 98 % of in-ear headphones rated. |
Total Harmonic Distortion (THD) | 5% | |
Sensitivity | -15 dBV/Pascal | Worse than 99 % of in-ear headphones rated. |
Impedance | 150 Ohm | |
In-Cord Volume Control | Yes |
The sound quality can be affected by many factors. When it comes to frequency range, a wider range will allow more detail to be heard during your listening session. However, it is important to note that the ability to perceive frequencies varies from person to person. The average person is able to hear frequencies in the range of 16 to 20 000 Hz. That is why headphone manufacturers usually focus on the 20 to 20 000 Hz range. If the lower values are lower, headphones are better able to reproduce bass tones, as these represent frequencies up to approximately 256 Hz. Conversely, values from 2 048 Hz upwards are treble. Thus, headphones with a high upper limit will provide a much more accurate reproduction of high tones. Headphones Poly - Plantronics M 145 have a frequency range of 300 - 3300 Hz. The Poly - Plantronics M 145 reaches the sensitivity values of -15 dBV/Pascal. The sensitivity of the headphones expresses the ability of the headphones to pick up the signal from the source and reproduce it with sufficient volume. The higher the sensitivity, the more easily the signal is converted to sound and the louder the headphones are able to play at a lower power consumption. It is important to remember that high listening volume can consume more energy from connected devices. So if you want to listen to music from your cell phone, it's better to choose headphones with low sensitivity to avoid draining your phone's battery too much. Headphones with a lower sensitivity value (around 85 dB) are better suited for listening in quiet environments, while medium values (around 90 dB) allow for quality listening in noisy environments such as public transport or cafes. Headphones with a high sensitivity value (100 dB or more) are designed for use in really noisy environments such as concerts To control the optimum playback volume you can use the manual control directly on the cable.
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 150 Ohm value. Total harmonic distortion is one of the parameters you will come across and usually includes the average value of the distortion when reproducing all frequency bands. This parameter is not critical when choosing headphones, but it is important to remember that higher harmonic distortion can negatively affect sound quality. In case of these headphones, the total harmonic distortion is Audio Output | Total Harmonic Distortion.
MICROPHONE Poly - Plantronics M 145 |
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Type | Boom | |
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Microphone Technology | Electret condenser | |
Microphone Operation Mode | Mono, cardioid | |
Connectivity Technology | Wired | |
Audio Input Details | Cardioid - 300 - 3300 Hz - Output Impedance 3.3 kOhm | |
Total Harmonic Distortion (THD) | 5% | Better than 81 % of in-ear headphones rated. |
Sensitivity | -55 dBV/Pascal | |
Impedance | 3.3 kOhm | |
Microphone Power Source Voltage (DC) | 3 V |
Poly - Plantronics M 145 has a boom–type microphone. The microphone sensitivity is -55 dBV/Pascal. A lower microphone sensitivity will generally ensure that even quieter sounds are caught. On the other hand, in noisier environments, distortion of the recording may occur. With a higher sensitivity, the microphone will not distort the recording even in noisy environments. On the other hand, the microphone will not pick up quieter sounds. So it depends on the environment and the purposes you plan to use the headphones for. As with headphones, so-called harmonic distortion affects the sound quality of a microphone. Harmonic distortion above 5% is quite high and can lead to a reduction in recording quality. The average for most headphones is a distortion between 1 and 5%. For the average user, the recording quality of a headphone microphone in this interval should be perfectly adequate. Total harmonic distortion below 1% is more likely to be encountered in professional headphones. Such distortion is already considered very low and will ensure maximum recording quality. The total harmonic distortion of this microphone model is Microphone | Total Harmonic Distortion.
Show moreREMOTE CONTROL Poly - Plantronics M 145 |
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Controls | Mute |
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CABLE Poly - Plantronics M 145 |
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Cable Type | Audio cable - 1.2 m |
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CONNECTIONS Poly - Plantronics M 145 |
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Connector Type | Headset (sub-mini phone stereo 2.5 mm) |
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OTHERS Poly - Plantronics M 145 |
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Included Accessories | Headphones earpads | |
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Service & Support | Limited warranty - 1 year |
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