Public Address System, Amplifier

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Bosch LBB 1903 Single Zone 30W Mixing Amplifier
The Plena mixer amplifier is a versatile, high-performance unit with four mono microphone inputs and a music input. It fulfills a wide variety of public address requirements at a surprisingly low cost. All input channels have a phantom power supply to provide power to condenser microphones and selectable speech filters for improved intelligibility. Input channels 3 and 4 can also be switched to line sensitivity. Separate music inputs are available with their own input selector and volume control. Input channel 1 can take priority over all other microphone and music inputs. Contact closure on the 5-pin DIN connector, or if the signal level on channel 1 exceeds a predefined value (VOX) will activate priority. A 2-tone chime can be configured to precede a priority announcement. A telephone or emergency input with VOX activation and its own preset volume control overrides all other input. Loop through input and output connections enable external sound processing equipment, such as an equalizer or the Plena feedback suppressor, to be connected between the preamplifier and the power amplifier stages. An LED VUmeter monitors the master output. The unit also has a tape output channel. The Plena mixer amplifiers come in a range of maximum output power. This power is directly available on 70 V and 100 V constant voltage connections and on a low impedance connection for an 8 ohm load. Moreover, the amplifiers have a separate 70 V / 100 V call-only output channel for addressing areas where only priority announcements are required, and a 70 V / 100 V mix-only output channel for areas where no priority announcements should be heard. The call-only output can also be used for 3-wire remote, volume control override. For more output power than the built-in power stage can deliver, additional Plena power amplifiers can be connected to the balanced line output in a loop-through arrangement. Contact Us
TOA 120w Mixer Amplifier A-1000 Series Basic Package Amplifier A-1121 (120W) AS Version Cost effective and durable mixer power amplifier. 3 Mic / 2 Aux inputs, plus one recording output. Individual input volume controls plus master volume control. Voice-activated mic takes precedence over other inputs. Built-in current limiter and thermal protection circuit. AC mains or DC operation. 600 Ω, balanced, XLR input (MIC 1). Make contact-activated muting function.
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Amplifier - LBB 1912
PLENA mixer amplifier LBB1903/x0, LBB1906/x0, LBB1912/x0 and LBB1914/x0 The PLENA mixer amplifier is a high performance, versatile four microphone inputs mono mixer amplifier, capable of fulfilling a wide variety of public address requirements for surprisingly low cost. A wide choice of input connectors are available: balanced 3-pin XLR and phone jack for microphones, 5-pin DIN for a priority microphone, and stereo Cinch for music sources (converted to mono). All microphone inputs have phantom power supply to provide power to condenser microphones and selectable speech filters for improved intelligibility. Microphone inputs 3 and 4 can also be switched to line sensitivity. Furthermore separate music inputs with their own input selector and volume control are available. Contact Us

The Plena mixer amplifier is a versatile, high-performance unit with four mono microphone inputs and a music input.
It fulfills a wide variety of public address requirements at a surprisingly low cost.

All input channels have a phantom power supply to provide power to condenser microphones and selectable speech filters for improved intelligibility. Input channels 3 and 4 can also be switched to line sensitivity. Separate music inputs are available with their own input selector and volume control.
Input channel 1 can take priority over all other microphone and music inputs. Contact closure on the 5-pin DIN connector, or if the signal level on channel 1 exceeds a predefined value (VOX) will activate priority. A 2-tone chime can be configured to precede a priority announcement. A telephone or emergency input with VOX activation and its own preset volume control overrides all other input. Loop through input and output connections enable external sound processing equipment, such as an equalizer or the Plena feedback suppressor, to be connected between the preamplifier and the power amplifier stages. An LED VUmeter monitors the master output. The unit also has a tape output channel. The Plena mixer amplifiers come in a range of maximum output power. This power is directly available on 70 V and 100 V constant voltage connections and on a low impedance connection for an 8 ohm load. Moreover, the amplifiers have a separate 70 V / 100 V call-only output channel for addressing areas where only priority
announcements are required, and a 70 V / 100 V mix-only output channel for areas where no priority announcements should be heard. The call-only output can also be used for 3-wire remote, volume control override. For more output power than the built-in power stage can deliver, additional Plena power amplifiers can be connected to the balanced line output in a loop-through arrangement.

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