[Phys-l] Speaker

[chuck britton <britton@ncssm.edu>]

Definitely worth putting a DPDT switch on one or both speaker leads.

Before putting the cardboard sheet up to the bare speaker - just cup  
your hands around the right and left edge of the bare speaker.

(shows that it isn't the vibrating cardboard that is vastly improving  
the sound.)
(long wavelength diffraction/interference etc.)


On Apr 2, 2008, at 8:32 AM, Rick Tarara wrote:

>  double pole, double throw switch.  I can switch to in phase/our of  
> phase on the fly.
>
> "World's Greatest Sound Demo"  --2 inch raw speaker, wired to the  
> receiver,
> play music through the speaker--tinny with no volume.  Bring up a 1  
> foot
> square (approx) baffle board (can be simple cardboard) with 2 inch  
> hole.
> Place speaker in hole!  Students are astounded!  Then talk about  
> mounting
> raw speakers on back deck in cars!