120 W power amplifier using compact chassis u 70 V / 100 V and 8 ohm output u two way switch with priority function input u used to perform over 100 V speaker circuit affiliate operating 100 V input u from before to after the forced ventilation in order to realize the temperature control, can be directly stacked LBB 1930/20 120 W power amplifier is a powerful, use 2 u 19 inches tall case, can be used in the cabinet, also can use on the surface of the table. The LED indicator on the front panel shows the state of the amplifier: power supply, audio output poles, and a variety of monitored functions. This high performance device can meet all kinds of public broadcasting requirements, and the cost is very low. Basic function reliability amplifier with overload and short circuit protection. The temperature controlled fan can guarantee high reliability when high power output and low noise when low power output. When the internal temperature reaches the critical limit due to poor ventilation or overload, the overheat protection circuit will turn off the power amplifier and activate the LED indicator light on the front panel. The device can use either ac power or a 24v emergency standby pool power and can switch between the two automatically. For emergency evacuation applications, the following functions are monitored: ac power status, battery power status, pilot tone status and amplifier operation status. The LED indicator on the front panel is used to indicate the status of the monitored function. For general public broadcast, the user can turn off the LED indicator light used to indicate pilot sound monitoring and battery status. Each monitored function is equipped with a fail-safe (electrically-closed) relay. These relays are always active regardless of the switch status on the back panel. The input system is equipped with balanced input of two priority control, each with a loop device. This makes it easy to connect to remote systems that require priority control. In addition, an additional 100 V circuit input is provided to connect the amplifier to the 100 V speaker circuit, thus providing greater power for the remote location. Gain or level control is located at the back of the device to avoid unexpected Settings changes. Instrument display output level with LED indicator. The output amplifier is equipped with 70v and 100v output for the constant pressure loudspeaker system. Low impedance output is also provided for 8 ohm speaker loads. LBB 1930/20 has two separate priority controls for the 100v output, one for areas where only priority input is required to broadcast, and the other for areas where no priority input is required to broadcast. Control and indicator front panel • meter (LED indicator light, Instructions - power 20, to 6, 0 dB and open), battery operation light, overheat indicator lights on the back plate, control input level 1, level 2, the power button, the power switch control input interconnected components on the back board, the first line input 1 (XLR/balance), line loop 1 (XLR/balance), 2 (XLR/balance) line input, 2 (XLR/balance) circuit loop, the speaker output terminals of priority control, 24 VDC power supply terminals, Three speakers directly output terminals, two 100 V auxiliary input terminal, input 2 enable control terminal, input 1 priority control terminals, grounding connection screws, socket certificates with immunity recognition security in accordance with EN 60065 standard EN 55103-2 standard radiation in accordance with EN 55103-1 in emergency conform to EN 60849 standard certification European CE component number 1 LBB CPD Poland CNBOP accessories 1930/20 belle power amplifier 1 power line 1 19 "mount bracket kit 1 safety instructions 1 cable technical specifications with XLR connector ac power supply voltage 230 VAC plus or minus 10% 8 A maximum power consumption 50/60 Hz into current 400 VA battery voltage 24 VDC power supply + 15% / 15% maximum current 6 A performance index output power (RMS/maximum) 120/180 W standby power dB frequency response of 50 Hz power reduction - 1 to 20 kHz (+ / - 1 3 dB, rated output) - 10 dB reference distortion < 1% (rated output power), 1 kHz signal to noise ratio (maximum volume ping temple) > 90 dB line input 2 road 3 needle XLR connectors, balance type 1 euro 20000 V impedance sensitivity CMRR > 25 dB (50 Hz and 20 kHz) 40 dB gain 100 V input connector screw, Non-equilibrium sensitivity of type 100 V output impedance euro 330000 circuit loop road 2 3 needle XLR connectors connected directly to the line input level 1 V rated impedance 3 road in the speaker output connector screw, floating direct output 100 V, 70 V, 8 ohm priority (1) from the input only 100 V or 70 V, internal optional music only (non-priority) 100 V or 70 V, Internal optional power ac power operation maximum power 193 W - 274 W - 3 dB 6 dB idle 18 pilot tones * 41 of 143 W W W 24 VDC operation maximum power (168 W) - 3 dB with 7.0 A 6.0 A 6 dB (144 W) - 4.3 A (103 W) * 0.9 A pilot notes (22 W) 0.1 A spare (2.4 W) * 20 kHz - 20 dB, the loudspeaker loads