Really: no better way to test the speaks on those low notes from
a natural environment as opposed to a tone generater or something.
People _are_ spooked by organ music though.  I oncve had a guy in the 
cabs that, upon hearing the organ recital I had on made me change it.
I did.  I'm not militant about it.  Not as militant as, say,
Lawrence University in the town where I live who refused to
let Frank Zappa take a turn at their King Of Instruments at
the performance chapel.  But that was long ago.  After listening to 
Pipe Dreams for some time now, I've learned that there are a large
number of these things around.  It's sort of like playing a 
steam engine I'd think.  