Searching for matching(?) Subwoofer solution

@bdp24 wrote:

"would you expand on your recommendation of introducing a 90 degree phase difference between left and right subs?"

This is an idea I learned from a paper written by David Griesinger many years ago.

David recommended two subs, one directly to the left and one directly to the right of the listening area, up against the side walls. With the phase 90 degrees apart (in "phase quadrature"), this would approximate at the left and right ears the somewhat out-of-phase low frequency waves one would experience in a large hall. The result is a greater sense of being immersed in a large acoustic space, which means the ear is not perceiving as much "small room signature" super-imposed on top of the recording. As you hear less of your room’s signature, you correspondingly hear more of the ambient space on the recording.

Wouldn’t say it’s a huge difference, but as long as it doesn't bust the budget I think it’s arguably a worthwhile improvement. 

Duke

I did look up this term though:

Psychoacoustic Phenomenon Pseudo Stereo Deep Bass

Apparently it does not exist.

I really wanted to ask is this psychoacoustic phenomenon only in playback and the recording studio environment? But I guess I can’t cause I don’t have the Swarm and haven’t fully read the studies of Earl Geddes."

Hello tyray,

    Psychoacoustics is a legitimate scientific field of study that is very relevant in understanding how and why the use of multiple subs significantly improves the perception of deep bass response below 80 Hz in virtually any room.

     I clearly stated on my 8/15 post on this thread, however, that the term "Psychoacoustic Phenomenon Pseudo Deep Bass" was a term I named and used to describe my perception of an affect I noticed utilizing multiple subs in my systems. This was a facetious term that I made up trying to be a bit humorous.  Sorry for the confusion, but I honestly didn't expect anyone to take this as a legitimate term.

     To answer your question, psychoacoustics is an important factor in recording, such as the proper number and positioning of mics, and it's also an important factor in playback, such as the proper number and positioning of subs for good bass performance and the proper positioning of the pair of stereo main speakers in relation to the designated listening position for good midrange, treble and imaging.

    I believe I understand you didn't like me questioning whether a Richard Vandersteen quote on their website, that I believe contains numerous errors and falsehoods, accurately represented his thoughts or was just promotional advertising prose.  We may never know the answer to this but I was just sharing my thoughts and opinion.

   I also believe that you understood I wouldn't like your dismissing my statements on psychoacoustics as "psycho bass babble bullshit".  I disagree but believe you're free to state and share your thoughts and opinion.

   I agree with you that we are all here to share thoughts and ideas with each other.  But I also think we need to agree to do so in an honest and free manner while also agreeing not to be too easily offended. 

Thanks,

  Tim  

Audiorusty asked: "Since a DBA system can evenly distribute low bass evenly to all parts of a room are you also able to distribute the mids and highs evenly to all parts of the room or are you still relegated to a single listening sweet spot in the room due to the directionality of the mids and highs?"

Are you asking about speakers in general, or about my speaker designs in particular? 

Duke