I have been using 3 / 4 restored to nine years since I had the empty boxes, I got the controller with m1 crown and push for all that. Xti, 2000 for a sub that runs in 4 ohms 2x800 rms and 1 xti 4000 for heads and a limiter anyway, dbx, an Allen & Heath Xone 92 with semi-parametric EQ which is all 0, the signal has no need to be treated, and I have a monstrous ... gouache for a size small enough (250 to 400 people are immersed in a pleasant sound that is not harsh, in fact my clients make me note and that is important. well as the public because it can change the heads they grow well in full mode and sub-mode and it beside remains ... for me it's good stuff, except that I I waited a year for the hps heads who are also not given. But I wanted them, so if you add a fever? will not filter for descendre.J 'have more than enough of that sound that acute induction and I get sound crystal (c'estpas engine ok) but it does a good job and it covers really well. I have a third sub for sale in super condition with controller m1