Originally Posted by mrplaydo
I hope some of you audio conneisseurs can help me out with a couple of points.
You don't want a conneisseur, you want someone who has made audio *wine* starting with growing, picking, and stomping the grapes! ;-)
I'm designing some Desktop 2.0 speakers and would like to know:
1. In a Bass Reflex enclosure why is the bass vent located at the bottom?
Probably to put it as near as possible to a room boundary. BTW, I know of many counter-examples.
Is this purely because bass is directed at the lower area of the body?
No, bass tends to be non-directional. You can point a vent anywhich way you want to, and the low bass will go everywhere.
2. Can a Bass Reflex system work if there is a vent located above and below the driver (as illustrated)? If not, what would be the outcome?
You can have as many vents as you want to. The things to worry about vents is that they are the right size to tune the driver and the enclosure to the right frequency, and that they don't have excess turbulence at low frequencies and make chuffing sounds.
Bear in mind that these are small desktop 2.0 speakers so I don't believe bass, mid and high frequency positioning would be such an important factor here.
The usage "desktop 2.0" speakers is new to me. I think that you mean 2-channel speaker without external subwoofer.
I'm familiar with this type of speaker as "near field monitors".