An amplifier is any device that amplifies a (usually electric) signal. Amplifiers designed only to amplify audio signals – as created by mics, guitars etc. – can be called audio amplifiers.
A PA speaker could refer either to a speaker intended for use with a PA system, or a speaker-amplifier combination designed to amplify sound from a microphone.
A PA amplifier is usually an audio amplifier designed to accurately amplify sound, esp. of the human voice, and drive loudspeaker(s) so that this sound can be heard better than if it were unamplified – for example in a large classroom, or in an airplane, or in an auditorium.
DSPPA PA Amplifiers
Bosch Plena PLE-2MA120-EU
These Plena mixer amplifiers are high performance, 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 a crisp call or clear music is as easy as turning on the radio. The amplifier is also surprisingly affordable, without sacrificing features such as ducking, priority and flexibility. Bosch Plena PLE-2MA240
The Bosch Plena PLE-2MA240 is a highly versatile 240 watt, 2 zone mixer amp with a total of 9 inputs, suitable for 100 volt line commercial audio systems as well as low impedance sound systems using 8 ohm loudspeakers.
Easy to use, with simple zone labels included in the box as well as setting indicators which enable the installer to place coloured markers on the volume and tone controls to indicate optimum and maximum recommended volume settings.
An integral 24 VDC battery charger trickle charges a 24 VDV backup battery (available separately) which could then power the amplifier in the event of a mains failure.
Despite its simplicity, the PLE2MA240 still has flexible features such as ducking, priority paging and voice activated emergency override.
The Bosch PLE 2MA240 can be used freestanding or mounted in a 19″ rack using the rack mounting brackets supplied.
Compatible with the Bosch PLE-2CS 2 zone call station / paging mic.
This flexible public address amplifier is suitable for distributed sound systems for background music and microphone calls. Bosch Plena Matrix PLM-4P125 / PLM-4P220
The Bosch PLM-4P125 and PLM-4P220 Plena Matrix amplifiers are reliable cost effective 4 channel amplifiers with bridgeable outputs. Ideal for sound systems in shopping centres, schools, churches, restaurants and conference venues.
These efficient class D amplifiers also have a DSP built in and benefit from a power saving mode which reduces running costs by 80% when areas are not in use.
The tamper resistant design has no controls on the front of the unit; DSP processes and input mixing is all controlled by GUI via PC or iOS app.
The PLENA Matrix system is designed to be versatile and easy to use. Users can control the audio settings and adjust volume levels wirelessly via an iPad® or iPhone® app. The PLM 8M8 PLENA matrix 8-channel DSP Matrix Processor provides complete control over the audio configuration and signal processing. Users can simply walk into a particular zone and confidently mix and select inputs whilst controlling output levels. From live and background music environments to high demand speech applications, this iOS app sets new standards for end user control.
The ‘Amp Link’ input enables the PLM-8M8 matrix mixer to be connected via CAT5 cable for a neater finish and reduced installation time.