@tarkuz
another question regarding PA system, what's minimum / maximum distance between loudspeakers ? i am using a Peavey Escort 2000.. i'm going to use it in an outdoor event .. see the illustration below
and should the speaker be placed in a 45 degree angle so that i can achieve stereo sound ? and does the mic placement will cause feedbacks? we don't have floor monitors that's why we suggest putting the loudspeaker at the back.
In order for a sound reinforcement system to even begin to perform at its best, the loudspeaker must be placed in such a manner that the direct sound from the loudspeaker cannot get into an open microphone. The loudspeaker placement in the above illustration is incorrect. Correct loudspeaker placement, in front of the most forward mic and mounted so that the speaker system can adequately cover the audience, means that the loudspeaker need to be seen. This is because the high frequencies that are very important to the perception of speech only travel in a straight line. These frequencies can easily be blocked as well, because they have very small wavelengths. That portion of the loudspeaker that is producing the high frequencies must have a direct line of sight between itself and the listeners' ears. Therefore, the loudspeaker needs to be placed well above the heads of the audience and tilted forward and downward so that most of the high frequency wavelengths can fall directly on the audience's ears.
The first rule of thumb about loudspeaker placement is that speakers need to be forward of the most forward mic.
The second rule of thumb for speaker placement is place the speaker above the heads of the audience so that the high frequencies have a chance of projecting back to the farthest listener.
How far can one of these Escort 2000 loudspeakers throw? The answer depends on several variables, such as acoustics, program material, and the actual distances involved. Most of Peavey's 2-way loudspeakers designed for FOH (front-of-house) sound reinforcement can do a good job up to 50 ft. or more. Under certain more ideal acoustical conditions, they may still perform well at 60 to 70 feet, but I can't tell you that you would be satisfied with their performance at distances beyond 80 - 100 ft. let alone 150 feet or even greater distances. With portable PA systems such as the Escort 2000, maximum distance between loudspeakers may be around 30 feet only.
Hope this helps.
