Setting up dual subwoofers with one sub-out?

Hey guys,

I just purchased two 15" Audiopulse Axis subwoofers and would like to clarify some issues about the setup..

http://www.parts-express.com/pe/showdetl.cfm?Partnumber=293-622

I also have a Yamaha P7000S and Samson S-Convert on order.

I was looking at the flat-pack subwoofer cabinets sold by the diysoundgroup to save myself some work.

http://www.diysoundgroup.com/flat-packs-1/subwoofer-flatpacks.html

Unfortunately, the 3.5 ft^3 cabinet that looks like it would fit the Audiopulse is out of stock but the 3 ft^3 cabinet might work with a small modification. I was planning on running the subs sealed as I believe they should have enough output down low as is.

Now, the P7000S can run the subs separately in stereo and I believe the S-Convert can also be used in stereo. I wanted to get something like the Reckhorn B-2 or eQ.2 for use as a high-pass filter and for some equalization. Unfortunately, the eQ.2 is backordered and it doesn't look like CSS sells the Reckhorn units any longer. I don't know if there is anywhere else to source a Reckhorn unit at this point. I'm currently trying to decide if I can run the subs without a high-pass but I don't if I'm comfortable with that even though it looks like I probably don't need it.

So, do I just need an RCA splitter in order to run dual subwoofers off of a single sub-out and does anyone know where I might be able to source a Reckhorn (B-1 or B-2)?

That looks like it might be a good option. Thanks for the advice. I'll probably try running them without the high pass first and buy something to EQ them with later.