Original sentence: A public address system is an electronic amplification system  with a mixer preamplifier, amplifier and loudspeakers, used to reinforce a given sound (e
Edited sentence: A public address system, as manufactured by world renown brands such as Tannoy, AEX System and Philips, is an electronic amplification system  with a mixer preamplifier, amplifier and loudspeakers, used to reinforce a given sound (e