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In the Forum: Horn-Loaded Speakers
In the Thread: How to USE “Resonating Oops” in loudspeakers
Post Subject: Injection, Resonance, & Point SourcesPosted by drdna on: 12/2/2007

 Romy the Cat wrote:
From where I am staying Injection is not debatable. What dubious is - the methods of Injections. The large panels of Layered Sound has own advantaged and own disadvantages. I was considering in past to use another Red injection channel (driven form the same amp) and located at floor to contra-balance vertical image shift in my case. In case is listening is done not in extreme nearfield it would not be necessary ... From surface it looks like an Injection is just a forced substitute for our disability to have regular channels/drivers with right TTH characteristics (Tone, Transient, and Harmonics) where all necessary Injection benefits are included.


 Winnie wrote:
For me the key is not in adding measured amounts of distortion (though inevitably there will be some) but in the blending of point source and omni directional sound.


In my mind these are very different goals.

Stereo reproduction is an odd thing.  We could think about reproducing the musical event in two ways:

1) We record and reproduce all the information received by each ear. We need two channels.  This is binaural recording.  This ignores the vibrations received from music throughout the body, etc.  Ideally we use headphones.

2) We try to reproduce the event.  We want an infinite number of channels at all locations 360 degrees around the event.  Microphones record all sounds directionally: what comes from the rear is trasduced via a speaker to the front and vice versa.  All sounds and vibrations of the musical event are reproduced entirely and directionally.

3) With stereo, as we have it, it is neither of these.  We have two channels for two ears, but we have speakers set up, interacting with the room, as if to try to reproduce the event.  The idea of blending directional and non-directional output is appealing because it accepts this compromise and is perhaps most true to the artifice of stereo as we have it.  It is important to keep clear of the goals here and not be confused by pleasant distortions and novelties however.

Regarding TTH injection/Black Box, it is a very different animal, the goal is to optimize the TTH of reproduction due to the limitations of the drivers, to create an ideal functional driver.

The problems inherent with each line of thought are that we must be careful to be seduced by distortions and novelties, and that we are still trying to reproduce a two-channel source.  As we move farther from two point sources (uni- or omni-directional), we encounter more problems.

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