Key Features
- Robust neckband
- Reflector strips: Ideal for joggers
- Neodymium magnets for detailed sound
sport earphones, fitness, jogging, training
MSRP:$69.95
sport earphones, fitness, jogging, training
MSRP:$69.95
General Description
The sleek and sporty PMX 80 SPORT II neckband headphones can be worn practically anywhere...even during your toughest workouts. These rugged stereo neckband headphones feature an ergonomic neckband and vertical transducer system for optimum fit and comfort. Their sweat-proof materials were built to handle indoor and outdoor sports with ease. Go the extra mile.
Features
- Ergonomic neckband system guarantees the best-possible fit
- Powerful neodymium magnets for balanced, detailed sound reproduction
- Sennheiser Basswind System delivers powerful bass response
- Meticulous construction delivers product durability backed by a performance guarantee
- Reflective neckband for extra visibility and safety when running
- Sweatproof and water-resistant; washable under running water
- Single-sided cable with cable clip (included)
- Compatible with all 1/8" (3.5mm) stereo headphone jacks including all iPods and iPhones
- Built-tough with a 2 YEAR warranty!
Delivery Includes
- PMX 80 earphones
- Earpads
- Cable clip
sport earphones, fitness, jogging, training
MSRP:$69.95
Technical Data
| Cable length |
3.9 ft. (1.2 m) |
| Frequency response (headphones) |
19 Hz - 21,000 Hz |
| Impedance |
64 Ω |
| Sound pressure level (SPL) |
121 dB (1kHz/1Vrms) |
| Total harmonic distortion (THD) |
< 0.1% |
| Transducer principle |
Dynamic |
| Weight |
Approx. 0.56 oz. (16 g) |
sport earphones, fitness, jogging, training
MSRP:$69.95
Recommended Accessories
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Article No. |
sport earphones, fitness, jogging, training
MSRP:$69.95
Variants
sport earphones, fitness, jogging, training
MSRP:$69.95
sport earphones, fitness, jogging, training
MSRP:$69.95
Glossary
| Cable length |
| The cable length is usually measured between the anti-kink sleeves of the cable (cable length without connectors). |
| Frequency response (headphones) |
| The frequency response of a pair of headphones is given within limits defined by the manufacturer. |
| Impedance |
| Impedance expresses the AC resistance of a microphone or a set of headphones. It is dependent on frequency and is given at 1 kHz as the so-called nominal impedance. Impedance is measured in ohms. In recent years, an industrial standard has developed, setting the impedance of headphones at 50 or 600 ohms. Sennheiser headphones are manufactured according to this standard, thus practically ruling out connection problems. With microphones, the input impedance of the following microphone amplifier should have at least three times the value of the nominal impedance, in order to prevent it from unnecessarily attenuating the microphone signal. |
| Sound pressure level (SPL) |
| Due to the impractical numerical values, the sound pressure is usually given as the logarithmic value of the sound pressure level according to the equation: dB SPL = 20 x log (po / 0.00002 Pa). The abbreviation SPL (sound pressure level) is added in order to make a clear distinction from other uses of dB. The reference sound pressure, which is at the same time the threshold of hearing, is then 0 dB SPL. The threshold of pain is 140 dB SPL. A difference in the sound pressure level of 1 dB is just about perceptible, while a doubling of the sound pressure corresponds to 6 dB and a doubling of the volume corresponds to a rise of 10 dB.
|
| Total harmonic distortion (THD) |
| Total harmonic distortion is a measure of non-linear harmonic distortion and is given in %. Non-linear harmonic distortions are signals which were not present in the original before the signal was converted by the headphones. These unwanted signals are caused by the diaphragm, whose movements do not precisely move in time with the electric signals that cause it to move. Unfortunately, this is a feature of all electroacoustic transducers. Although it cannot be completely eliminated, suitable steps can be taken to minimise it. However, the user is not interested in why this distortion takes place but in how great the level of distortion must be for it to become perceptible. According to the findings of several research projects, a total harmonic distortion of 1% in the frequency range of 100 to 2000 Hz is imperceptible. Below 100 Hz, the perceptibility threshold lies at 10%. |
| Transducer principle |
| Two transducer principles have become established for the conversion of electric energy into mechanical energy: electrodynamic and electrostatic transducers, whereby the latter is only to be found in audiophile systems, due to their relatively high manufacturing costs. Electrodynamic transducers basically consist of a ring-shaped permanent magnet and an oscillation coil, which is fixed to the receiver diaphragm. When an audio-frequency alternating current is passed through the oscillation coil, it is caused to vibrate in accordance with the audio-frequency alternating current, thus causing the diaphragm to vibrate in the same way. |
