designing a pair of x12's and need advice

Im sure if you give an idea of your budget for them people on here will be more than happy to help you.

No problem :) I have built a set of X12s myself for my soundsystem.

We have eminence delta 12s in them and some cheapy compression drivers. We are in the process of upgrading the compression drivers and have had a number of suggestions.

We are going for the BMS 4538 heard some great things about BMS and not a bad price either. If you look in the general forum you will see a thread started by me about compression drivers which may be worth a read but I'm sure any of the drivers people reccomend on here will definetly be a good option.

I haven't heard them myself taking abit of a chance but if you have a look around on here there is a lot of good things said about them.

Well our tops are bi-amped so the mids and hf have a seperate amp mids get 825W a side and Hf im not too sure about and our sub gets about 1800W pictures of my system are in the show off your soundsystem thread

well I do like the sound of the eminence delta 12s in the x12 but they are a budget driver and I'm sure the p audio driver you mentioned will do a better job. The deltas do the job and I am happy with them however but still contemplate upgrading to some p audios or precision devices at some point.

Ye this site is a wealth of knowledge Iv been reading it for a while before building my system I just try and soak all the information in!

Well in most tops you buy off the shelf they will have a passive crossover inside the box that will seperate the frequnceies. for me it was easier this way as it meant i didn't have to design a passive crossover or buy one for inside the speaker plus i couldnt see any to buy off the shelf that handled the power. The ability to change crossover points was another factor that appealed to me.

AS for most straight forward im not sure what you mean.

If you mean speakon or whatever then speakon is without a question the one to use, its industry standard. for bi amping tops however you need four core speakon whcih is basically two wires combined into one so 2 different signals can be sent down it.

Havent used ours for free parties yet but that is the plan only finished it a couple of weeks ago. we've used it for a couple of birthday parties, pub/club nights and the like...

Well the crossover splits the full frequncy to mids and highs and obviously this needs to be done in a way that both the speakers get the right amount of power to make the box sound even. I did look on blue aran but couldn't see any that would handle the power needed for the deltas and it was easier for me to bi amp anyway as i had a berry ultradrive and a spare amp.

You dont have to create your own crossover points as i said you can buy passive crossovers ready made but most people on here will reccomend you have a go at building your own.

http://www.bluearan.co.uk/index.php?browsemode=category&category=Speaker_Components&masthead=Passive_Crossovers&subheadnew=2_Way_Crossovers

they are passive crossovers they simply split the signal into the HF and low frequncy at the points stated in the description.

Ah right well XLRs are fine as long as you know how to wire them (I couldn't tell you the right way) but your best having speakons on the box you build. but you can just make a cable that goes from XLR to speakon however the amps may have binding posts as well?
They look something like this
http://asia.cnet.com/i/r/2007/hav/62013047/sc004.jpg

If they do have that I would use them, you just put the bare wire of the cable into them.

haha cheers man were really happy with it been out almost both days of every weekend since we built it. planning some end of school and beach parties for summer... should be good :P