Power Amplifier
Bosch LBB1935/20 240W Plena Power Amplifier
Performance
Frequency response 50 Hz to 20 kHz (+1 / -3 dB at -10 dB ref. rated output)
Distortion <1% at rated output power, 1 kHz
Loudspeaker Output
The amplifier has 70 V and 100 V outputs for constant voltage loudspeaker systems, and a low impedance output for 8 ohm loudspeaker loads.
Priority Controlled Output
The LBB 1935/20 has two separate priority controlled 100 V outputs for zones that only need announcements made via the priority input, and for zones that will not receive announcements made via the priority input.
Line Inputs
2x Line Inputs with Priority Switching
Line Loop-through
The system has two balanced inputs with priority control, each with a loop-through facility. This makes it easy to connect remote systems that require priority control.
Controls and Indicators
Meter (LED's for -20, -6, 0 dB and Power ON), Battery operation indicator
Overheat indicator, Level control input 1 & 2, Power button, Mains switch
Protection
The amplifier is protected against overload and short circuits. A temperature-controlled fan ensures high reliability at high output levels and low acoustic noise at lower output levels.
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Electrical |
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Mains Power Supply |
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Voltage |
230 VAC ±10%, 50/60 Hz |
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Inrush current |
9 A |
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Max power consumption |
760 VA |
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Battery Power Supply |
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Voltage |
24 VDC +15% / -15% |
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Current max |
11 A |
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Performance |
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Output power (rms/maximum) |
240 / 360 W |
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Power reduction on backup power |
-1 dB |
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Frequency response |
50 Hz to 20 kHz (+1 / -3 dB at -10 dB ref. rated output) |
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Distortion |
<1% at rated output power, 1 kHz |
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S/N (flat at max volume) |
>90 dB |
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Line inputs |
2 x |
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Connector |
3-pin XLR, balanced |
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Sensitivity |
1 V |
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Impedance |
20 kohm |
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CMRR |
>25 dB (50 Hz to 20 kHz) |
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Gain |
40 dB |
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100 V Input |
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Connector |
Screw, unbalanced |
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Sensitivity |
100 V |
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Impedance |
330 kohm |
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Line loop-through output |
2 x |
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Connector |
3-pin XLR |
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Nominal level |
1 V |
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Impedance |
Direct connection to line input |
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Loudspeaker Outputs |
3 x |
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Connector |
Screw, floating |
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Direct output |
100 V, 70 V, 8 ohm |
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Priority only (from input 1) |
100 V or 70 V internally selectable |
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Music (non-priority) only |
100 V or 70 V internally selectable |
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Power Consumption |
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Mains operation |
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Max power |
451 W |
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-3dB |
340 W |
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-6dB |
244 W |
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Pilot tone |
55 W |
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Idle |
16 W |
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24 VDC operation |
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Max power |
12.1 A (290 W) |
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-3 dB |
11.4 A (274 W) |
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-6 dB |
8.1 A (194 W) |
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Pilot tone |
1.7 A (41 W ) |
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Idle |
0.3 A (7 W) |
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Mechanical |
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Dimensions (H x W x D) |
100 x 430 x 270 mm (19" wide, 2U high, with feet) |
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Weight |
Approx. 12.5 kg |
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Mounting |
Standalone, 19”rack |
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Color |
Charcoal |
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Environmental |
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Operating temperature |
-10 ºC to +55 ºC (14 ºF to +131 ºF) |
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Storage temperature |
-40 ºC to +70 ºC (-40 ºF to +158 ºF) |
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Relative humidity |
<95% |
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Acoustic noise level of fan |
<48 dB SPL at 1 m (max output) |
EVID-S8.2TB: Product FAQs
The Electro-Voice EVID-S8.2TB is an 8-inch two-way surface-mount speaker supplied as a black pair. It is designed for background and foreground music, paging and sound reinforcement in restaurants, retail stores, fitness clubs and hospitality venues.
Yes. Its built-in 60 W transformer supports 70 V and 100 V systems, with selectable 15 W, 30 W and 60 W taps. A 7.5 W tap is available for 70 V systems only. An 8-ohm bypass also supports low-impedance operation.
Yes. The EVID-S8.2TB has an IP54-rated enclosure for indoor and outdoor applications. Its included mounting system supports wall or ceiling installation, with 90° horizontal and 45° vertical adjustment.
The EVID-S8.2TB comes with a pre-assembled mounting system for wall or ceiling installation. It allows 90° horizontal and 45° vertical adjustment to position the speakers. Mounting brackets and a 5 mm Allen wrench are included.
ESCO (Electronic Security Company) is an official Electro-Voice dealer in Pakistan.