Perhaps you should read my white paper on Near Field Line Arrays as it will address many of your questions.

Another place to look for performance of a full range driver line array would be Darren Kuzma's design at:

http://www.partsexpress.com/projectshowcase/Kuze3201/Kuze3201.html

Look at the response data before equalization to understand how the response of a full range speaker array suffers across the 10-20 kHz octave.

Jim

• Near Field Line Array White Paper