Stethoset - Museums, Theaters, Churches
$199.95
General Description
The HDI 830 is a professional two-channel stethoset receiver for wideband transmission systems (with carrier frequencies of 2.3 MHz and 2.8 MHz) in museums, theaters and churches. The wearer can switch between channel 1, channel 2 or stereo signal reception. The receiver provides excellent speech intelligibility and very good music reproduction. It is comfortable to wear and is sure to provide long operating times.
Features
- Infrared wideband stethoset receiver
- Ideal for stereo and two-channel applications (2.3 / 2.8 MHz)
- Excellent speech intelligibility
- Very good music reproduction
- Balance control for setting the volume for the right and left ear
- Ergonomic volume control
- Receiver automatically turns on/off when it is put on/removed
- High degree of wearing comfort thanks to flexible earpads and low receiver weight
- Lithium polymer battery technology ensures a long operating time of up to 12 hours
Delivery Includes
- HDI 830 stethoset receiver
- BA 300 battery
- 2 alternative pairs of earpads
Stethoset - Museums, Theaters, Churches
$199.95
Technical Data
| Modulation |
FM, stereo |
| Receiving frequency |
2.3 / 2.8 MHz |
| Frequency response (headphones) |
50 - 16,000 Hz |
| Max. sound pressure level (active) |
125 dB (1 kHz) |
| Total harmonic distortion (THD) |
<1% |
| Signal-to-noise-ratio |
typ. 75 dB(A) |
| Operating time (Accupack) |
up to 12 hours |
| Charging time |
approximately 3 hours |
| Weight incl. Accupack |
approximately 2.4 oz (68 g) |
Stethoset - Museums, Theaters, Churches
$199.95
Recommended Accessories
| Part/Accessory |
Article No. |
| BA 300 |
500898 |
Lithium polymer rechargeable battery for Set 900, RI 900, Set 830-TV, RI 830, Set 830 S, RI 830 S, IS 410, RI 410, RS 4200, RR 4200
|
| Ear cushions |
528123 |
Black silicone cushion for RI830 (S), RI840 (S), RI900 (Quantity: 10)
|
| Ear cushions |
528124 |
White silicone cushion for RI830 (S), RI840 (S), RI900 (Quantity: 10)
|
| Ear cushions |
528125 |
Black foam cushion for RI830 (S), RI840 (S), RI900 (Quantity: 10)
|
| L 300-10 |
502710 |
Charger with power supply for ten BA 300 and ten HDI 830, RI 830, RI 830-S, and RI 900 receivers.
|
Stethoset - Museums, Theaters, Churches
$199.95
Variants
$199.95
Glossary
| Charging time |
| The time required to recharge a Sennheiser accupack. After recharging, automatic chargers will automatically switch to trickle charging. |
| Frequency response (headphones) |
| The frequency response of a pair of headphones is given within limits defined by the manufacturer. |
| Max. sound pressure level (active) |
| The maximum sound pressure a unit can reproduce before a given THD is reached. |
| Modulation |
| The process in which one wave is varied by some parameter of another wave, for example, an RF carrier frequency that is modulated by an audio signal. Types of modulation include amplitude modulation, frequency modulation, pulse code modulation and pulse width modulation. |
| Operating time (Accupack) |
| Indicates the operating time with a new, fully charged accupack. |
| Receiving frequency |
| Gives the frequency/range of frequencies to which a receiver can be tuned. |
| 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%. |
