I'd suggest you do a passive 2-way for the top and then go active with a bottom driver.Hi.
I'm planning my new system. I want to build a 3 way active system (front speakers).
My current ideia is to use the ULTRADRIVE PRO DCX2496 as the crossover. The amplifiers will be 3 A500 also from behringer (one for each channel).
The drivers configuration will be MTMWW. The tweeter is the Seas 27TBFC/G, the midwoofers Dayton RS180 and the woofers RS270. The box will be sealed because I want the most clean and "fast" sound I can achive. The midwoofers and woofers will be wired in parallel (4 ohm load on the amplifier). I would like to add a third woofer (MTMWWW), but that would have a dificult impedance for the amplifier. Why another 3rd woofer? Because of the added dinamics and lower distortion numbers at a given listening level. Any solutions?
I currently have a TC 2000 15" subwoofer in a sealed box with 110 L crossed over at 60Hz.
1 Your wasting amp on the tweeter and upper-midrange driver.
2 There are a lot of issues your are gonna have trying to actively cross the tweeter and upper-midrange driver.
The A500 has a known defect with a distorted note at around 1000hz I believe. This has been shown in one case to be caused by being placed on another warm device. I do suggest you give them some breating room in your rack as such. I'd also propose you look into the EP2500 amp instead. The versatility and limitless power of these amps will do the trick with no concerns for defects.
Maybe in terms of non defects, but a consumer level amp is going to complicate things a lot.I was able to get a Rotel 75watt stereo amp for ~$150US that I'd argue is going to be better than A500.
You can't use the XLRs on them with Pro-Audio devices so you'd need to attenuate the signal after passing it with an XLR to RCA cable. It's doable, but for only 75 watts per channel I think it's a bad tradeoff. Besides despite repeated arguments about amplifier sound I've never seen a DBT show anyone able to detect differences between solid state amps.
If you're truly on a budget you may comb Craigslist and ebay for QSC amps. They are kind of a first level pro-audio gear company.
As this is a high expense project I suggest you do it the best you can and not cut corners. Even if it takes longer.
If this is gonna be your first build. I suggest you get your feet wet with the Recession Buster Kit from Madisound first. It comes with the crossover and drivers for 59 bucks. Not bad at all in my book.
For fill you can get fiber very very cheap at home depot. It's not quite OC 703 or rockwool, but it's still more effective than Polyfill and a cheaper. I saw a roll for 10 bucks the other day.