BOSCH PLE‑1MA030‑EU Plena Mixer Amplifier
▶ 4 microphone/line inputs, plus 3 music source inputs
▶ 100 V and telephone input with priority & VOX
▶ Announcement only output, 3-wire volume override
▶ Voice-activated emergency override
▶ Power Output (30 Watts)
▶ 2-tone chime
▶ Outputs for line out and music only out
▶ Unique easy-to-use intuitive tone controls.
A telephone / 100 V emergency input with VOX activation is provided for easy integration with another PA system or a telephone paging system. It has its own preset volume control and overrides all other inputs, including call station and inputs 1 and 2.
The unit also has a line output to add amplifiers for larger systems with more output power. This output can be switched to music only, for example, so that music on hold can be provided for the telephone system.
The mixer amplifiers come in 30 Watt output power. This power is directly available on 100 V constant voltage connections and on a low impedance connection for an 8 ohm load. Moreover, the amplifiers have a separate 100 V call-only output channel for addressing areas where only priority announcements are required. The call-only output can also be used for 3-wire remote, volume control override.
An LED VU meter monitors the master output. A headphone socket, below the VU meter, provides the mixer output. For total reliability and ease of use, a limiter is integrated into the output stage to restrict output if the user applies too much signal.
Controls and indicators
• On/off switch • Power on LED
• LED VU meter for master output (LEDs for -18, -12 -6, -3, 0 dB)
• Master volume knob • Four volume knobs for microphone inputs
• Knob for treble level • Knob for bass level • Headphone socket
• Background music button
• Dip switches • Ducking level • Tel/100 V volume control
See Technical Specifications.
Mains power supply
Voltage 230 VAC ±10%, 50/60 Hz (reduced power at lower mains or battery voltage)
Inrush current 4.5 A
Frequency response 50 Hz to 20 kHz (+1/‑3 dB @ ‑10 dB ref. rated output)
Distortion <1% @ rated output power, 1 kHz
Bass Control Max -12/+12 dB (frequency is setting dependent)
Treble Control Max -12/+12 dB (frequency is setting dependent)
Dimensions (H x W x D) 100 x 430 x 270 mm
(19″ wide, 2U high)
Mounting Stand-alone, 19″ rack
Approx. 5 kg