Private Audio
- Headphones
- Headsets
- Assistive Listening
- Microphones
CX 300-II Precision Black
Article No. 502737
Key Features
- High passive noise attenuation
- Modern, bass-driven stereo sound
- Designed for an inconspicuous fit
- Carrying pouch and extra ear adapters included
black earphones, stereo
Related Products
black earphones, stereo
General Description
Offering a powerful, bass-driven stereo sound with greater clarity and improved dynamics over standard earbuds are the CX 300-II Precision Black ear-canal phones. The various sizes of ear adapters (S/M/L sizes) provided in the package allow for a customized fit as well as exceptional noise blocking capability.
Features
- High-quality dynamic speaker systems for bass-driven stereo sound and durability
- Personalized fit in the ear canals functions as an earplug and high-quality speaker
- Customizable ear adapter system achieves the perfect fit
- Convenient carrying pouch included
- Asymmetrical cable reduces tangles and cable clutter
- 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
- Only purchase from an authorized dealer. See our dealer locator, and cross reference our non-authorized list (here)
Delivery Includes
- CX 300-II ear-canal phones
- Ear adapter set (S/M/L)
- Carrying pouch
black earphones, stereo
Technical Data
| 3.9 ft. (1.2 m) | |
| 19 - 21,000 Hz | |
| 16 Ω | |
| 1/8 | |
| 113 dB (1kHz/1Vrms) | |
| Dynamic | |
| 615104167360 (black) | |
| 615104167407 (silver) | |
| 4044155043006 (black) | |
| 4044155043037 (silver) | |
| 1.9 x 3.9 x 8.4 inches | |
| 0.50 lbs | |
| 18.5 x 10.8 x 20.4 | |
| 24.0 | |
| 40 |
black earphones, stereo
Variants
| CX 300-II Precision Silver | |||
| CX 300-II Precision in Silver! |  |
||
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. |
| Jack plug |
| A common audio connector in consumer electronics and music industry. Available in various diameters; in the hi-fi segment, 1/8" and ¼" are widely used. Poles range from one to four. (Examples: headphone jack or jack of an electric guitar). |
| 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. |
| 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. |