[sdiy] semi ot: loud speaker for synths

[Czech Martin]

> The wavelength of the low E on a bass guitar (42 Hz) is 26 feet.   
> Your ears are about 6 inches apart.
> 
> Direction doesn't really mean much at that scale.

I know. But I can still hear, if the speaker is on the left or right
side. You tend to move you rhead all the time.
One reason why headphones can be disturbing.
With a blindfold, I can walk arround *a little* and find it. Certainly.
I did it (with low volume, so distortion does not count).
So there still is directional information, but not as good as for 
high frequencies.

> Whenever you have multiple speakers you get cancelling effects.  It's
> expected and accepted.  For instance, if you play a 500Hz mono sine
> wave into both speakers of a stereo pair and then walk around the room
> you'll hear nodes every foot or so.  Nobody complains about that.

Of course. They will never cancel to 0, because of the complex diffuse
room impulse response. But if you elelctrical add up two channels,
it can cancel to 0. This is a real notch. BTW: a good idea for
out of tune oscillators: do not sum up electically (without diffusion),
but sum up diffuse information. Sounds different.

> Sure.  Yet the 1x18 will probably have far better characteristics with
> respect to enclosure size, efficiency, weight, low end response, etc.
> (Otherwise larger speakers wouldn't sell.)

Perhaps a 1x18 is cheaper. Musicians tend to go for cheapness.
(And complain about bad sound afcterwards).

m.c.
>