Key Features
- New for '09! (replaces MX 75)
- Sweatproof and water-resistant
- Secure fit with Twist-to-fit system
- Neodymium magnets for detailed sound
Water-resistant headphones, sport, Jogging
MSRP:$69.95
Water-resistant headphones, sport, Jogging
MSRP:$69.95
General Description
Serious about your workout? Look no further than the MX 85 Sport II earphones. These stereo earphones feature Sennheiser's innovative and exclusive Twist-to-fit system, offering you the best possible fit while running or lifting weights. The sweat-proof construction guarantees headphone durability.
Features
- Twist-to-fit system secures the earbud for consistent bass response
- Requires no adjusting for a truly hands-free listening experience
- Sennheiser Basswind System delivers powerful bass response
- Powerful neodymium drivers for balanced, detailed sound reproduction
- Engineered for exceptional durability and light weight
- Sweatproof and water-resistant; washable under running water
- Cable clip and carrying pouch included
- Compatible with all 1/8" (3.5mm) stereo headphone jacks including all iPods and iPhone
- Asymmetrical cable eliminates tangles and cable clutter
- Built-tough with a 2 YEAR warranty!
- Important wearing note! The longer side of the asymetrical cable goes behind the neck and into the opposite ear. This mimics a single sided cable and reduces the amount of cable in front of the wearer during physical activity. This is a safety and ergonomic feature. Please contact Sennheiser with any questions about product fit.
Delivery Includes
- Ear adapter set
- Twist-to-fit rings (S/M/L)
- Earpads
- Cable clip
- Carrying pouch
- MX 85 earphones
Water-resistant headphones, sport, Jogging
MSRP:$69.95
Technical Data
| Cable length |
3.9 ft. (1.2 m.) |
| Frequency response (headphones) |
18 Hz - 21,000 Hz |
| Impedance |
64 Ω |
| Sound pressure level (SPL) |
117 dB (1kHz/1Vrms) |
| Total harmonic distortion (THD) |
< 0.1% |
| Transducer principle |
Dynamic |
| Weight |
Approx. 0.32 oz. (9 g) |
Water-resistant headphones, sport, Jogging
MSRP:$69.95
Recommended Accessories
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Water-resistant headphones, sport, Jogging
MSRP:$69.95
Variants
Water-resistant headphones, sport, Jogging
MSRP:$69.95
Water-resistant headphones, sport, Jogging
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. |
