info@kps.com.vn
+ 84 903 709 019
LA3-VARI-E
Many large modern and classical buildings, like passenger terminals and cathedrals, use hard reflective materials for floors, walls and ceilings. Due to their size and absence of absorbing materials the reverberation time is long and the amount of indirect reverberant sound compared to direct sound is high. This is disastrous for good speech intelligibility. Still it is very important to hear and understand the spoken message, whether it is a gate change announcement on an airport, a prayer in a house of worship or an evacuation message in case of an emergency. Here the Bosch Vari‑directional Array offers a really smart and easy solution.
FEATURE
- Unmatched sound quality and speech intelligibility
- Smart modular design, flush mountable
- Sophisticated beam configuration with EASE support
- Integrated ambient noise level sensor for AVC
- Available in gray or white
TECHNICAL SPECIFICATIONS
|
Attribute |
Value |
|
Frequency Range (VARI‑B) |
130 Hz to 10 kHz (±3 dB) |
|
Frequency Range (VARI‑BH) |
130 Hz to 18 kHz (±3 dB) |
|
Max SPL Continuous/Peak (VARI‑B) |
90 / 93 dB SPL (A‑weighted at 20 m) |
|
Max SPL Continuous/Peak (VARI‑B+E) |
90 / 93 dB SPL (A‑weighted at 32 m) |
|
Max SPL Continuous/Peak (VARI‑B+E+E) |
88 / 91 dB SPL (A‑weighted at 50 m) |
|
Max SPL Continuous/Peak (VARI‑BH) |
89 / 92 dB SPL (A‑weighted at 20 m) |
|
Max SPL Continuous/Peak (VARI‑BH+E) |
89 / 92 dB SPL (A‑weighted at 32 m) |
|
Max SPL Continuous/Peak (VARI‑BH+E+E) |
87 / 90 dB SPL (A‑weighted at 50 m) |
|
Horizontal Coverage Angle (Fixed) |
130° (-6 dB, average 1 to 4 kHz) |
|
Vertical Coverage Angle (Adjustable) |
Software-configurable |
|
Maximum Throw Distance: |
|
|
- VARI‑B(H) |
20 m |
|
- VARI‑B(H)+E |
32 m |
|
- VARI‑B(H)+E+E |
50 m |
|
Transducers: |
|
|
- VARI‑B |
4” Full Range (8 x 1 driver) |
|
- VARI‑BH |
4” Coaxial (8 x 1 driver) |
|
- VARI‑E |
4” Full Range (4 x 2 drivers) |
|
Electrical: |
|
|
Input Voltage (2x) |
0 dBV rms |
|
Maximum Input Voltage |
+20 dBV peak |
|
Type |
Balanced transformer |
|
Impedance (Balanced) |
7.8 kohm at 1 kHz |
|
Input Voltage 100 V (2x) |
+40 dBV rms |
|
Type |
Balanced transformer (dynamic input) |
|
Impedance (Balanced) |
1 Mohm at 1 kHz |
|
Amplifier Power: |
|
|
- VARI‑B(H) |
8 x 15 W (class‑D full bridge) |
|
- VARI‑E |
4 x 25 W (class‑D full bridge) |
|
Protection |
Thermal shutdown, Current limiting, Dynamic range >105 dB |
|
Power Supply: |
|
|
Mains Voltage |
100 to 120 V / 200 to 240 V (auto-switching) |
|
Power Consumption |
See chart |
|
Power Factor |
According to EN61000‑3‑2, Class A |
|
Mains Current Flow |
See chart |
|
Protection |
Thermal shutdown, Current limiting, Power on/off lock |
|
Signal Processing: |
|
|
DSP |
32-bit floating point, 900 Mflops |
|
ADC / DAC |
24-bits S-D, 128 x oversampling |
|
Sampling Frequency |
48 kHz |
|
Functions: |
|
|
- Delay Before (max 21 seconds) |
|
|
- Input Delay (max 2 x 10 seconds / 4 x 5 seconds) |
|
|
- Equalizer and Adjustable Filter |
|
|
- Compression |
|
|
- Volume |
|
|
- AVC |
|
|
Control: |
|
|
Network Interface |
RS‑485 full duplex, auto-switching |
|
Baud Rates |
115k2, 57k6, 38k4, 19k2 baud, optical isolation |
|
Maximum Units |
126 |
|
Monitoring: |
|
|
General Status |
|
|
Amplifier and Load Monitoring |
|
|
External Pilot Signal Detection |
(20 kHz to 30 kHz, minimum -22 dBV) |
|
Environmental Noise Mic Detection |
|
|
Overheating Protection |
Yes |
|
Relay Fault |
Can be hidden |
|
Control Power 1 |
Relay 1: No Fault = Closed / Fault = Open |
|
Control Power 2 |
Relay 2: No Fault = 10 k ohm / Fault = 20 k ohm |
|
Control Voltage |
5 to 24 Vdc, optical isolation |
|
CobraNet: |
|
|
Interface |
RJ‑45, Ethernet 100 Mbps |
|
Word Length |
16-/20-/24‑bit (set by transmitter) |
|
Sampling Frequency |
48 kHz |
|
Supplementary Delay |
1.33/2.67/5.33 ms (set by transmitter) |
|
Mechanical: |
|
|
Dimensions (Height x Width x Depth) |
See chart |
|
Weight |
See chart |
|
Color: |
|
|
Cabinet |
VARI‑B(H) and -E: RAL9007 (gray aluminum) |
|
Grille |
VARI‑B(H) and -E: RAL9006 (white aluminum) |
|
Environment: |
|
|
Operating Temperature |
-25 °C to 55 °C (-13 °F to 131 °F) |
|
Storage and Transport Temperature |
-40 °C to +70 °C (-40 °F to +158 °F) |
|
Relative Humidity |
Below 95% |
