just run a hose from your AC into the box //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif.. ya you should be able to put some more to it and get better numbers
Running an AC vent into your box is a terrible idea. Depending on the size of the vent, it would either act like an auxiliary port, or alter your enclosure's internal volume perceived by the speaker.
put your hand in front of the port at or near full tilt, tell me how a little fan blowing onto a coil/motor is going to actually keep that air going in that direction when you have massive amounts of air going all over hell and creation in the box... I see it impossible to concentrate that airflow into the area you want it to. I will however say that I try and keep my subs/amps as cool as possible before a burp or whatever, because cooler coils = less imp rise, yes? I think you have a great idea but in theory it wont work. Try and blow air out of your mouth and concentrate it onto something while you are standing in the middle of a hurricane, I just dont see it working.
The air inside the enclosure does not act the same way as the air at the mouth of the port. Think of the sound waves as waves in the ocean. The wave that laps at your feet, that started somewhere in the middle of the ocean days ago, did not carry the water that hit your feet from the center of the ocean. Its energy passed through the medium (water or air) on a molecular level. Water molecules in the center of the ocean bump into their neighbors, who bump into their neighbors, so on and so on until the wave hit a far away beach.
The ocean example works on the same principle as energy passed through the air molecules in your enclosure. The cone pushes local air molecules, who bump neighbors, who bump neighbors, until the energy is released through the port. Inside the box, unless you are very near the port opening, air is not whistling around like a gale force wind. If you were sitting in the box, you would perceive a rapid changing of air pressure. A fan blowing air inside the box, again unless very near the port opening, would also only perceive rapid changes in air pressure. If you were sitting inside the box looking at the fan, you'd see it speed up and slow down as pressure varied. You'd probably also see the blades change pitch. It would still move air.
And my ocean example brings me to my main point, the fan idea inside the box would work, but not as well as you might think. The sub does not push air out of the box through the port anymore than it sucks air in. There is no throughput motion of air with the sub acting as the pump. The **** sucks in just as much as it pushes out. The air that gets pushed out the port, a fraction of a second later is getting sucked back into the port. Very little air exchange actually happens. So not nearly as much heat transfer to the outside atmosphere happens as common sense usually dictates it would. So even if you create just the right conditions for your fan inside the box, it would mostly help saturate the air inside the box with heat. It believe it could be *slightly* advantageous, but there's a far better chance all your work would prove zero noticeable or even measurable differences. Not worth the hassle.
The setup ciaonzo is talking about could be effective, much more so than simply putting a fan inside the box, but to really implement it well you need to design the entire motor/frame of the speaker around the idea of the forced-air manifold encasing the motor.
IMO, unless you are a professional SPL competitor, you dont need to worry about artificially cooling your speakers. I would look at upgrading my equipment to handle the desired power. Or if I already owned a Warden, Id worry about it once I managed to burn it up once. Its silly to try to force more power to a speaker system than you know it will normally function at. Even if you hooked up ac vents and fans and shrouds and dry ice, if you need all that crap to keep your speaker alive, you might eek out a few hundred more watts of handling, but pushing it to that limit will drastically alter its lifespan, which is a much larger problem for daily users than it is for professional competitors.
Leave the idea in mothballs, its a lot of work to do right, its benefits wont be huge, and for daily users its simply not necessary if you have your head screwed on right.
