Personal Audio
PMX 90 - Sennheiser USA
Article No. 502860
Key Features
- Global 2-year warranty
- Ultra-lightweight and secure fit
- Classic design with a modern neckband
- Big bass response without sounding muddy
Neckband Headphones - Over the Ear Headphone - Stereo
$49.95
Related product
$49.95
General Description
Get all the sound and style Sennheiser was made famous for in a lightweight, high performance neckband headphone. Featuring mouth watering bass response and a pillow-soft earpad, the PMX 90 keeps the beat going without added bulk or batteries. The clear mid-range and treble accentuate complex rhythm tracks and vocals with ease.
A classic design with a modern twist, the PMX 90 is also available in a headband version PX 90.
With long-term comfort and impressive acoustics, the PMX 90 is the first choice for those looking for high-performance portable audio without breaking the bank.
Features
- Special earpad and transducer design delivers impressive acoustics without added bulk
- Steel headband is a tough and timeless design
- Classic styling with a modern twist
- Optimized for portable audio sources
- Dynamic transducers reproduce modern rhythmic tracks and classics with ease
- Global 2 year warranty
- Compatible (listen only) with latest generation of tablets
Delivery Includes
- PMX 90
$49.95
Technical Data
| Frequency response | 20-20,000 Hz |
| Wearing style | On-the-ear |
| Sound pressure level (SPL) | 108 dB |
| Total harmonic distortion (THD) | <0.5% |
| Cable length | 3.9 ft, single sided |
| Impedance | 32 ohms |
| Weight (w/o cable) | 1.8 oz (52 g) |
| Transducer principle | Dynamic, open |
| Connector plug | 1/8 inch (3.5mm) |
| UPC code | 615104170377 |
| EAN code | 4044155045291 |
| Dimensions (single) | 6.5 x 2.7 x 9 in |
| Weight (single) | 6.2 oz |
| Dimensions (master carton) | 19.6 x 16.5 x 9 in |
| Weight (master carton) | 8.9 lbs |
| Master carton quantity | 12 |
Glossary
| Cable length |
| The cable length is usually measured between the anti-kink sleeves of the cable (cable length without connectors). |
| Frequency response |
| The frequency response of a microphone is given within the limits defined by the manufacturer. In studio condenser microphones it is generally within the range of between 20 Hz and 20 kHz. |
| 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. |
