All what you need to start with AV... 
 
The most importand information picked up for you from many references then arranged to take you step by step to the AV world...
 
Very benefecial and ideally used with AV Training Course Level01 Videos.
 
Learn how to Design, Implement and Maintain Audio Video Systems:
The AV Projects Phases and Solution Dvelopment.
Understanding the concepts of AV systems.
Calculations of Screen Size and Viewing Angle.
Calculation of the Projector Brightness.
Speakers Coverage and the Amplifier Power calculations.
Preparation of the Drawings, BoQ and Budget.
Implementation phases and coordination with the project stakeholders.
and much more...