Looking at those charts, it looks like a better midbass speaker then a sub. It peaks in resistance around 30-50hz and is lowest in the 100-200hz.

 

Datasheet for one of their 21's: http://www.bcspeakers.com/PDF/PRD/21SW152.pdf

It's Fs is 32hz, many SPL subs have an Fs higher than that.

OP: Give it as much power as you can find. 2kw @ 4ohms wont be that easy, but it'll take it.

 

It's is a monster PA subwoofer, will require at least 10ft^3.

Do you want to use internally (cut through) or mount a box on the bed and use as a PA box?

Regarding the amplifier, you can find some good ones, like the SounDigital SD5000 2 ohms for the pair, but I have no idea where to get it.

 

I am mounting a box in the back of the bed. This box is going to be 6' x 2' 7'' x 2' this will be made out of 1'' Russian Birch. its going to be painted with this special paint at my work. To make it water proof and dent and scratch proof. Just looking for a good amp that will give me 2000-3000 RMS into 4 Ohm

 

What is your budget for an amp ? That kind of power at 4ohms isn't going to come cheap..



Wouldn't be my first choice for a driver.. but with 15mm xmax and a huge amount of cone area I'm sure it will get reasonably loud..

 

i think he was asking which amp u are gonna use. Where do u work.. can u get more lol.. smaller ones maybe. PM me if u can

 

i say get 2 cactus 5ks, conviently enough there are 2 for sale on here, lol

 

They need to put that line in a "b" sci-fi movie.

You missed a "d" though :P I wish i knew my stuff this well : /

 

Zapco 9.0 is about 2400

two clarion dpx 11551's would strap to 3100

cheapest route is two strappable amps that do max power at 2 ohm