Mooser wrote: A good woofer, even multiple woofers, yes, but is a sub-woofer an advantage?
Note: I only have headphones right now, so this is all theory...
I'm new to this organ, but I think it can produce frequencies down to 32.692 Hz. This is why I'm interested in a subwoofer. From my research, some woofers can produce this sound, but not with a flat frequency response. So your mid-range notes will sound way louder than your bass notes.
I found this tonewheel chart that explains the frequencies generated by Hammond tonewheels: http://www.goodeveca.net/RotorOrgan/ToneWheelSpec.html
This chart lists the lowest frequency as 32.692 Hz.
To confirm, I did an experiment where I found the lowest frequency by counting down from A440.
I started with a reference tone:
https://www.youtube.com/watch?v=gPBgWWZhcA4
Note: we can uncomplicate the experiment by using only the FUND (3rd from left or 4') drawbar. Then we don't have to think about foldback.
Using only the FUND drawbar, I find 440 Hz at the 3rd A from the left. The 2nd A is 220 Hz, and the 1st A is 110 Hz. But if you activate the Bass Pedal button and use only the SUB drawbar, you can get one octave lower, 55 Hz (I don't have pedals yet).
So the lowest A on the organ is 55 Hz, and referencing the tonewheel chart, the C below that is 32.7 Hz.
If you follow my steps, do you get the same answer?
My goal is for the whole organ to sound at apparently equal volume, although I'm questioning everything now
I just discovered a Motion Sound subwoofer, the SW-15. I assume this is designed for organ playing, but the manual says it is 40 Hz - 300 Hz. Maybe it would do the job?