Total bass suck out at 40hz


So I'm a little slow, but it occured to me today to see if there were test tones recordings on Tidal of Qobuz. Yes there are. I have a radio shack SPL meter so I went to work playing them to see what I had in my room. I was shocked to find a total lack of audible bass at 40hz. At first I thought they must have made an error in the recording. Then I went to a different set of test tones and wow same thing. I never dreamed something like that would take place. I have read a lot of discussions about bass peaks and nulls and always thought it would just be slightly less in volume at the null, not completely gone. So Am I imagining this and if not what do I do to remedy it. I am apparently missing a lot of music and never knew it. I am currently listening to my freshly refinished Yamaha NS 1000m speakers(just put them in the system Wednesday after work) with a Modwright KWI 200 integrated amp and a Lumin streamer/dac. I also have stereo Rythmik  F12 subs. Thanks, Allen.
mizike

Showing 1 response by aschuh

At a speed of sound of ca 330m/sec, a 40 Hz wave length estimates at ca. 8.3 m, half wave = 4.15 m, pretty close to 14 feet.
I.e., you experience a text book suck out (cancellation of half wave by reflected half wave of opposite amplitude).
As others have stated, move the subs around, asymmetrically.
Good luck!