There appears to be a lot of controversy regarding the workings of the L-Acoustics cardioid configuration. It's been suggested that it is achieved by means of all-pass filters. Is it a gradient or end-fire solution? In part 1 of this series of articles I will try to explain what I have come to think of as a hybrid approach.
An article in response to a series of ProSoundWeb forum posts questioning the necessity of delay speakers.
The default argument in favor of delay speakers appears to be level restoration. The default objections are timing issues and sonic perspective distortion.
This article attempts to explore some serious but often overlooked advantages of delay speakers beyond plain level restoration.