Two Subs Vs. One

Warnerwh...I too have a spectrum analyser, and in general I can't agree with you about how much signal lies below 45 Hz. What kind of music are you playing? Some recordings do go right down to 20 Hz, but in my music library these are the exceptions. Also, if you are playing vinyl, rumble and warp will keep your SW busy, but do you really want to listen to rumble and warp?

Elevick..."Remember, bass below 80hz is really non-directional". This is widely stated, but, to my ears, is not true.

Bob_reynolds...I am not quite sure what your question is, but...

It is widely stated that a very LF sound source can't be located by a listener. Without getting into whether the statement is true or not, my contention is that it is widely stated. I believe this because it is often said in Audiogon postings which I have read (and other reviews). When something is said often enough people accept it as true.

I believe that a LF sound source can be located simply because I can do it, and I don't think that my ears are anything special. The ability to localize the sound is most obvious when it comes from behind the listener in a multichannel system. Left to right localization is also easy unless, as is often the case (particularly with LPs) the LF signal has been blended to mono. A mono LF sound will create a phantom image between two subwoofers, just like higher frequency sound. Also, if multiple subwoofers are operating out of phase, through either electrical connections or placement, the sound will have a "diffuse and directionless" quality...exactly what happens at higher frequency.

Theaudiotweak...That's a good point about the caninet vibrating at higher frequency. However, it doesn't apply in my case because my custom subwoofer systems are embedded in a wall (and built like a brick SH).