Sakthi AV Tronics

The Plena system pre-amplifier is a versatile, high-performance unit with call and mono BGM (background music). It fulfills a wide variety of public address requirements at a surprisingly low cost. It can provide dual channel operation for simultaneous calls and BGM for up to six different zones, using two Plena amplifiers.
The call channel provides two inputs for the Plena call stations, LBB 1941/00 (all-call) or LBB 1946/00 (six- zone), with loop-through capability, and universal, balanced input. One is a 3-pin XLR connector for microphone or line level (selectable), and the other is a 5-pin DIN-connector with all call priority contact, which may also be used to start one of the available chime attention signals.The microphone input has a selectable speech filter for improved intelligibility, a volume control, and bass and treble tone controls with shelving characteristics optimized for speech. The call channel is available on the balanced XLR master output.

Bosch Plena Economy mixer amplifiers are professional public address units with modern state‑of‑the‑art features.
They are easy to use, taking the complexity away from the user and putting it where it belongs, inside the equipment. Providing crisp and clear announcements and music is as easy as turning on a radio.
Offering the essentials of public address in an affordable package.

• Inbuilt Bluetooth for audio streaming
• Supports audio playback from USB pen drive
• 4 microphone/line inputs, plus music source input
• Insert feature to use as a pre/power amplifier
• Optional 2‑tone chime generation for input 1

Bosch Plena Economy mixer amplifiers are professional public address units with modern state‑of‑the‑art features.
They are easy to use, taking the complexity away from the user and putting it where it belongs, inside the equipment. Providing crisp and clear announcements and music is as easy as turning on a radio.
Offering the essentials of public address in an affordable package.

• Inbuilt Bluetooth for audio streaming
• Supports audio playback from USB pen drive
• 4 microphone/line inputs, plus music source input
• Insert feature to use as a pre/power amplifier
• Optional 2‑tone chime generation for input 1

Bosch Plena Economy mixer amplifiers are professional public address units with modern state‑of‑the‑art features.

They are easy to use, taking the complexity away from the user and putting it where it belongs, inside the equipment. Providing crisp and clear announcements and music is as easy as turning on a radio.
Offering the essentials of public address in an affordable package.

• Inbuilt Bluetooth for audio streaming
• Supports audio playback from USB pen drive
• 4 microphone/line inputs, plus music source input
• Insert feature to use as a pre/power amplifier
• Optional 2‑tone chime generation for input 1

BOSCH LBD1938/00 amplifiers feature colorful LED bar on the front side to indicate the acoustic level of the signal in dB.LBD193x amplifiers have 100V input for slave operation of the amplifier, XLR loop in and loop through facility for ease of installation and 100V output as well as 70V output for connecting to the loudspeakers with line matching transformers, 8ohm and 4ohm outputs for connecting to the Low impedance speakers. The output voltage can be selected between 100V and 70V internally.Additionally LBD1938/00 amplifier features a dual XLR inputs with priority switching. Gain or level control is located on the rear of the unit to avoid accidental setting change. The amplifier works on 24VDC power supply during emergency situations

BOSCH LBD1938/00 amplifiers feature colorful LED bar on the front side to indicate the acoustic level of the signal in dB.LBD193x amplifiers have 100V input for slave operation of the amplifier, XLR loop in and loop through facility for ease of installation and 100V output as well as 70V output for connecting to the loudspeakers with line matching transformers, 8ohm and 4ohm outputs for connecting to the Low impedance speakers. The output voltage can be selected between 100V and 70V internally.Additionally LBD1938/00 amplifier features a dual XLR inputs with priority switching. Gain or level control is located on the rear of the unit to avoid accidental setting change. The amplifier works on 24VDC power supply during emergency situations

BOSCH LBD1935/00 amplifiers feature colorful LED bar on the front side to indicate the acoustic level of the signal in dB.LBD193x amplifiers have 100V input for slave operation of the amplifier, XLR loop in and loop through facility for ease of installation and 100V output as well as 70V output for connecting to the loudspeakers with line matching transformers, 8ohm and 4ohm outputs for connecting to the Low impedance speakers. The output voltage can be selected between 100V and 70V internally.Additionally LBD1938/00 amplifier features a dual XLR inputs with priority switching. Gain or level control is located on the rear of the unit to avoid accidental setting change. The amplifier works on 24VDC power supply during emergency situations

BOSCH LBD1938/00 amplifiers feature colorful LED bar on the front side to indicate the acoustic level of the signal in dB.LBD193x amplifiers have 100V input for slave operation of the amplifier, XLR loop in and loop through facility for ease of installation and 100V output as well as 70V output for connecting to the loudspeakers with line matching transformers, 8ohm and 4ohm outputs for connecting to the Low impedance speakers. The output voltage can be selected between 100V and 70V internally.Additionally LBD1938/00 amplifier features a dual XLR inputs with priority switching. Gain or level control is located on the rear of the unit to avoid accidental setting change. The amplifier works on 24VDC power supply during emergency situations

Bosch Plena Economy mixer amplifiers are professional public address units with modern state‑of‑the‑art features.
They are easy to use, taking the complexity away from the user and putting it where it belongs, inside the equipment. Providing crisp and clear announcements and music is as easy as turning on a radio.
Offering the essentials of public address in an affordable package.

• Inbuilt Bluetooth for audio streaming
• Supports audio playback from USB pen drive
• 4 microphone/line inputs, plus music source input
• Insert feature to use as a pre/power amplifier
• Optional 2‑tone chime generation for input 1

Bosch Plena Economy mixer amplifiers are professional public address units with modern state‑of‑the‑art features.
They are easy to use, taking the complexity away from the user and putting it where it belongs, inside the equipment. Providing crisp and clear announcements and music is as easy as turning on a radio.
Offering the essentials of public address in an affordable package.

• Inbuilt Bluetooth for audio streaming
• Supports audio playback from USB pen drive
• 4 microphone/line inputs, plus music source input
• Insert feature to use as a pre/power amplifier
• Optional 2‑tone chime generation for input 1