Bosch PLE-1P120-US - Plena Series 120-Watt Install Power Amplifier

The PLE-1P120-US and PLE-1P240-US are two high‑power plug-and‑play cost effective power amplifiers that deliver 120 and 240 Watts to constant voltage or 4 ohm loads. Built with premium quality and protections, they offer basic functionality at a budget price. The amplifiers offer straight 1 V and 70 V line in, and 25/70 V and 4 ohm outputs. They can extend the power of the PLE- series mixer‑amplifiers or be combined with the PLE-10M2-US mixer, or work anywhere where more power on an existing 70 V line is needed or when a line level signal is provided.

Features:

• 120 and 240 W power amplifier in a compact housing
• 1 V line level balanced input
• 70 V, 25 V and 4 ohm outputs
• 70 V input for slave operation on 70 V speaker line
• Temperature-controlled forced front to back ventilation (directly stackable)
• 24 VDC backup power with built‑in charger

Protection
The amplifier is protected against overload and short circuits. A limiter protects the amplifier and loudspeaker against accidental overdriving. A temperature-controlled fan ensures proper cooling without producing acoustic noise at lower output levels.

Power input and output
The unit operates both on mains power and on a 24 V battery power supply for emergency backup, with automatic switchover. The amplifier also has a built‑in charger to charge the connected battery. The system has a balanced input and loop‑through facility. This makes it easy to connect multiple amplifiers. The secondary input is a 70 V line input to connect the amplifier to a 25/70 V loudspeaker line to provide more power in remote locations. Gain or level control is located on the rear of the unit to avoid accidental setting change. An LED VU meter shows the output level. The amplifier has 25 and 70 V outputs for constant voltage loudspeaker systems, and a low impedance output for 4 ohm loudspeaker loads.