cgk said:
I'm wondering which parts (driver, amp) you would use and any suggested plans?
It's tough for me suggest specific parts to you, since I don't know your specific preferences or objectives. However, I would first check out something(cost effective) like the Parts Express Titanic 12" subwoofers. Solid designs at low(relative) cost. There are many options in this general price range(<$150 each drivers), but you need to find one that meets your specific need(s). If the budget was a little higher(average $240 each driver), I would suggest the Infinity 12d VQ subwoofers. The reason I recommend this device is that it has been confirmed to have relativey high SPL and linearity, and is simply a very good product design. But the biggest feature is that you can physically modify the mechanical characteristics of the driver motor with included interchangeable parts. This means that you can use this subwoofer in
any type(sealed, ported, infinite baffle, dipole, etc.) of enclosure that you want, and it will operate optimally. This provides for extraordinary flexibility in the future. Normally, when picking drivers, you must first consider the maximum SPL you require, bandwidth, enclosure size and type. But these are pretty much irrelevant in the case of the suggested Infinity driver. As for amplifiers, I prefer componet amps, as opposed to integrated plate amps. Just
my preference(based on versatality). Behringer, QSC and other pro sound companies make excellent high powered amplifiers. Alternatively, you can get a used amplifier off of ebay. I personally use an Adcom 555 for subwoofer applications, that was aquired at a rather low price off of Ebay.
-Chris