Personal Audio
freePORT Vocal Set - Sennheiser USA
Article No. 502809
Key Features
- Absolutely safe transmission
- Adjustable Squelch for undisturbed operation
- Diversity Technology for highest reception quality
- 4 switchable UHF frequencies for interference-free reception
Wireless Vocal Microphone Systems - Wireless Mics
$249.95
Related product
$249.95
General Description
The freePORT Vocal Set includes a handheld transmitter with a cardioid dynamic capsule and a diversity receiver. The transmitter is exceptionally comfortable to hold and provides a lively and assertive sound.
Features
- 4 switchable UHF frequencies for interference-free reception
- Absolutely safe transmission
- Diversity Technology for highest reception quality
- Adjustable Squelch for undisturbed operation
- Receivers built in robust metal housing
- Dynamic processor for cristal-clear sound
Delivery Includes
- Stand adapter
- Power supply
- User manual
- SKM 3 handheld transmitter
- EM 1 diversity receiver
CONSUMER ALERT
Most users do not need a license to operate this wireless microphone system. Nevertheless, operating this microphone system without a license is subject to certain restrictions: the system may not cause harmful interference; it must operate at a low power level (not in excess of 50 milliwatts); and it has no protection from interference received from any other device. Purchasers should also be aware that the FCC is currently evaluating use of wireless microphone systems, and these rules are subject to change. For more information, call the FCC at 1-888-CALL-FCC (TTY: 1-888-TELL-FCC) or visit the FCC’s wireless microphone website at www.fcc.gov/cgb/wirelessmicrophones.
$249.95
Technical Data
| Audio output level (balanced) | XLR, +16 dBu |
| Audio output level (unbalanced) | Jack, +10 dBu |
| Dimensions (handheld transmitter) | 11.2 in. (285 mm), d=1.4/2 in. (35/50 mm) |
| Dimensions (receiver) | 1.4 x 8.4 x 3.9 in. (35 x 213 x 98 mm) |
| Frequency response | 80 - 16,000 Hz |
| Operating time | 10 h. |
| Pick-up pattern | Cardioid |
| Power supply | 12 VDC nom |
| Power supply (handheld transmitter) | 9V PP3 |
| RF frequency range | UHF |
| RF output power | 10 mW |
| Signal-to-noise-ratio | 95 dB(A) |
| Switching bandwidth | 2 MHz |
| Total harmonic distortion (THD) | < 1% |
| Transducer principle | Dynamic |
| Transmission/receiving frequencies | 4 |
| Weight (handheld transmitter) | 7.4 oz. (210 g) w/o battery |
| Weight (receiver) | 16.6 oz. (570 g) |
Glossary
| Audio output level (balanced) |
| Logarithmic value of the audio output voltage based on a standard reference value. A balanced circuit or connection uses separate signal lines for sending a signal, returning the signal and ground (3-pole connection). |
| Audio output level (unbalanced) |
| Logarithmic value of the audio output voltage based on a standard reference value. An unbalanced circuit or connection uses the ground connection (or screening) to return the signal (2-pole connection). |
| 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. |
| Operating time |
| States how long a unit can be continuously used with one set of batteries / rechargeable accupack. |
| Pick-up pattern |
| Also known as polar pattern, directivity. According to their acoustic design, microphones differ in their sensitivity towards sound from different directions. Pressure microphones have a sensitivity that is largely independent of direction (omni-directional pick-up pattern). Pressure gradient microphones have the pick-up patterns wide cardioid, cardioid, super-cardioid or figure-of-eight. Interference microphones can be used to achieve a further concentration of the pick-up pattern (lobar pick-up pattern). As a special case, dummy head microphones achieve the pick-up pattern of the human ear/head (dummy head stereo). |
| Power supply |
| Description of the power source used for powering a unit, for example mains, battery, rechargeable accupack, etc. |
| Power supply (handheld transmitter) |
| Description of the power source used for powering a unit, for example mains, battery, rechargeable accupack, etc. |
| RF frequency range |
| The range of frequencies to which a unit (e.g. a receiver) can be tuned. |
| RF output power |
| Output power measured at the antenna socket. |
| Switching bandwidth |
| The frequency band in which frequencies can be switched directly. |
| 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. |
