Hi grannyring,
I'm glad you shared your recollection of the speaker in your past using a tweeter array that you totally enjoyed. It gives me the opportunity to clarify the misconception that the seven tweeters in the DI's are a type of line array in Eric's design.
Even though these are tweeter transducers the six of them that form the circle, based on what frequencies they handle, radiate acoustically as if they were one six inch mid-range driver. The transducer in the middle is being used as a tweeter and handles the high end frequencies up to 30Khz. So, acoustically you have a six inch mid-range driver with a coaxial mounted tweeter which means it functions as a single point source. Now, by Eric figuring out how to make this work you get all the advantages of a coaxial driver, however the mid-range array weights close to nothing leading to blazing speed/dynamics/micro-details compared to a regular six inch driver, regardless of what materials it is made out of it cannot be as light in weight. Yet, you still get not only remarkable transit response, but great control because each driver is small and well behaved. The closet you could come to this regarding weight/control would be a ribbon or AMT which cannot be used coaxial design as a single point source. Brilliant on his part!
The more I listen to the DI's regarding mid-range and high frequencies they easily rival any panel design/ribbon/AMT I have had in my system and surpass them in low end extension/dynamics and overall macro-dynamics.
I'm glad you shared your recollection of the speaker in your past using a tweeter array that you totally enjoyed. It gives me the opportunity to clarify the misconception that the seven tweeters in the DI's are a type of line array in Eric's design.
Even though these are tweeter transducers the six of them that form the circle, based on what frequencies they handle, radiate acoustically as if they were one six inch mid-range driver. The transducer in the middle is being used as a tweeter and handles the high end frequencies up to 30Khz. So, acoustically you have a six inch mid-range driver with a coaxial mounted tweeter which means it functions as a single point source. Now, by Eric figuring out how to make this work you get all the advantages of a coaxial driver, however the mid-range array weights close to nothing leading to blazing speed/dynamics/micro-details compared to a regular six inch driver, regardless of what materials it is made out of it cannot be as light in weight. Yet, you still get not only remarkable transit response, but great control because each driver is small and well behaved. The closet you could come to this regarding weight/control would be a ribbon or AMT which cannot be used coaxial design as a single point source. Brilliant on his part!
The more I listen to the DI's regarding mid-range and high frequencies they easily rival any panel design/ribbon/AMT I have had in my system and surpass them in low end extension/dynamics and overall macro-dynamics.