#3 : Alpine SWR-1522D
Third place goes to the Alpine SWR-1522D. It displaces more air than anything else in this list - 1.6 liters to be exact. It's also more expensive than our other winners, but would be a great match for a big powerful amp. Here's the details:
volume displacement : 1.6 liters
cost : $199
displacement per dollar : 8.06 milliliters per dollar
#2 : Alpine SWS-15D2
Second place goes to the next 'notch' down from the Type R. The Alpine Type S SWS-15D2. It doesn't move as much air as the type R, but it also costs a lot less. Based on the data from Alpine, I believe that both the Type R and the Type S have a flat BL curve. So both woofers are a good match for high power amps; the Type R a little bit more so.
Here's the details:
volume displacement : 1.17 liters
cost : $129.99
Displacement per dollar : 8.99 milliliters per dollar
#1 : Pyle PPA15
First place goes to the Pyle PPA15. Basically a low tech motor and a big cone, but very very cheap. The Pyle 'only' moves half a liter of air, but can be had for as little as $40 online. With shipping, it works out to about $55. At that rate, it has a small edge over the Alpine Type S.
Some notes on the contest:
1) There may be competing woofers which are more affordable. I crunched the numbers on about 20 candidates. If you have a candidate, post it.
2) Shipping is going to play a huge factor in who wins. For instance, you can get the Pyle from Overstock and have it delivered free; that will upset which driver moves the most air for the least money.
3) Get these deals while you can. Nearly every woofer that made my 'leaderboard' last time around has been discontinued. (Audio Psychosis • View topic - The Bass Race) Exodus Audio, Mach 5 and TC Sounds owned the charts last time. Two years down the road, the woofers that won are no longer being produced.