Mentioned in "As We See It" by Jim Austin in the March 2025 Stereophile. Perhaps you need two subwoofers. Paper from Lund University on "auditory envelopment" https://books.lub.lu.se/catalog/download/255/351/1613?inline=1
We have always needed two subwoofers in my unhumble opinion.
I remember getting two of Edgar's Seismic Subs and he said he had never sold a pair of them before. A year or so later he said it was becoming the norm.
I think four are even better. Not Seismics - I no longer use those. Four RYTHMIKs which load the room every bit as quickly and without taking up anywhere near the space. Along with much better/smoother frequency response. This is not for movies or super loud music. Four sound better and the distortion is negligible - the cones rarely move at all. I do find that delaying the speakers they cross to is the key between tuneful and grey low bass.,
What I thought even more interesting in the article was the aspect of the harm of summing the lowest frequencies.
I guess digital has allowed us to hear this since LPs are summed in the lowest frequencies.
When I play LPs I have my subs (below 50 Hz) summed in addition to what has been done on the recording itself. Without this the low frequency noise can become unbearable once one is accustomed to the LF quiet of digital.
If only digital mid-bass had the life and tonality of LPs ...
I remember getting two of Edgar's Seismic Subs and he said he had never sold a pair of them before. A year or so later he said it was becoming the norm.
I think four are even better. Not Seismics - I no longer use those. Four RYTHMIKs which load the room every bit as quickly and without taking up anywhere near the space. Along with much better/smoother frequency response. This is not for movies or super loud music. Four sound better and the distortion is negligible - the cones rarely move at all. I do find that delaying the speakers they cross to is the key between tuneful and grey low bass.,
What I thought even more interesting in the article was the aspect of the harm of summing the lowest frequencies.
I guess digital has allowed us to hear this since LPs are summed in the lowest frequencies.
When I play LPs I have my subs (below 50 Hz) summed in addition to what has been done on the recording itself. Without this the low frequency noise can become unbearable once one is accustomed to the LF quiet of digital.
If only digital mid-bass had the life and tonality of LPs ...