MT 122 As a 2-way passive MID TOP speaker

You would have trouble finding a crossover that could handle the sort of power that you would need to run the MT122 properly. Also, the MT122 is a long throw design, and has a fairly narrow dispersion, so you would need a minimum of 2 cabinets per side for most events.

What type of event will the system be for? I would suggest the X15 might be a better option for you.

I have been quoted 90 for an x12. But i need four of them really.

I was thking about to porn horn mids+ to high pass horns. But thats a wallet killer.

235 im hopefully going to pay for the mt122.No fittings paint.

You can alter the dispersion of the cab by changing the comp driver horn to a wider one.  The 12" is too low in frequency to effectively be guided by the horn (see DOm's polar plots of the Porn Horn to see this in effect and a better explanation).

I use 1/2 a MT122 (1x12" and 1xhorn) per side and it covers ok

Power wise i put 550w per 12" driver and 700w per horn section (but these don't ever run much more than -10db signal light on the mid and -20db signal light on the horn)

Actually my tops are beyma 550 comp drivers with 2x fane slot tweeters, totalling about 250-300w at 8R.

Like i said, you don't run them hard but a nice big amp does sound good.

The C-audio should do the job but i use PLX3402's so it's that or buy another smaller amp (and why would i want to do that?!)

Norty~

So this is a bi-amp'd cabinet? Controlling it is an ... ultradrive or a external crossover? So, this cabinet couldn't be made as a two way system to put with a subwoofer (to make it a 3 way system). Using 500 watts for the MT122?