Budget 2-way/2.5-way speaker.

I have been getting the itch to do a DIY build, and was just browsing Partsexpress. I am completely new to the DIY from the ground up process so hoping I can get some help and some constructive criticism. But here is what I found, I came Across some budget friendly drivers that look like they could pair well together. They have the $9 Aura NS6-255-8A woofers. I was thinking 2 of those per speaker paired with the Vifa XT25SC90-04 ring radiator.

http://www.parts-express.com/pe/showdetl.cfm?partnumber=299-030

http://www.parts-express.com/pe/showdetl.cfm?partnumber=264-1014


The woofers look to be a little more efficient and if I double them up, There would a be a greater difference between outputs of the woofers and the tweeters. So I was thinking of maybe doing a 2.5-way set-up. Vifa on highpass, one Aura for lowpass, and the other running lowpass, but at a lower crossover point like 200hz. Would that be a good way to combat the combined efficiency of both woofers to better match with the Vifa? Both drivers seem to have plenty of range so I will be able to play around with crossover points. I hope this is making some sense. Just an idea that I have been playing around with since last night.

I have yet to model out an enclosure for the the Auras but I wanted to run the idea by some people with a little more experience. Don't want to waste any time if my idea is a burning pile of..well you know.

Thanks in advance for any and all help.

Todd

Thanks for the answers guys. I already have the Aura's on order along with a similar tweeter. The Vifa Vifa DX25TG09-04. Same 4 ohm configuration, a little higher sensitivity, and a lower FS. Give me a little bit more FR to play with. I plan to mimic the Crossover design on the Sten IIs. I ordered a Dayton Measuring mic too so I may play around with that combo and use my crown amps build in DSP to mess around with x-over points before I actually build some.

I know I'd probably be better off with a proven design, but I am a sink or swim kind of guy. If and when I fail, I will learn from it and approve upon it. I kind of had my mind set on doing this from the ground up. Just hope I learn a bunch from this.

Thanks. Does anyone do any crossover modeling, like say with x-over pro? ANd what does everyone else use for enclosure modeling? I can work my way around Bassbox Pro 6, but wondering if there are any good alternatives?

What I need to do is read the Loudspeaker design cookbook again. Read it a couple years ago when I saw still in college and didn't retain anything but the basics.

How does the DATS work? I tried the older version of it a while back, and its measurements were way off from manufacturers specs. Scared me, but for all I know, I was probably doing something wrong.