[QUOTE]Originally posted by BenjaminRigby:
[B]I hope I am not alone in this, but what exactly is an octave? I've heard talk about it, but I don't really understand what it is.
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an octave is an interval of 8 diatonic tones:
a,b,c,d,e,f,g,a= 1 octave.
in hertz speak, an octave is the effect of doubling a given frequency going up in pitch or halving that frequency going down in pitch.
example: an electric bass guitar open E string is 41.2 hz.
12 frets up (1 octave higher: E, e#, F, f#, G, g#, A, a#, B, C, c#, D, d#, E...diatonic steps in CAPS) is 82.4 hz.
a low C on a pipe organ with a 32 foot long pipe is 16.35 hz. (put THAT in your svs and smoke it).

SKYFISH: very cool explanation of how to integrate your sub with the mains.
KCB is correct on paper, but i have found that in real life, bass guitar, bass tuba, some kick drums, synthesizers and pipe organs are the only instruments that reach below 60 hz. i don't like music with sub set any higher as it sounds too artificial and , as you said..the mains are better suited to handle that range, imo, you are right.

of course ht lfe is a different story.