So I do not Posed this sub but, chistera is a box has vierzon, there are two turning, and frankly his bah sends pathée, unfortunately ..... rcf in France, service after sale, and all very complicated, and the price of around nine that toune 1900 euros.Sinon say that the sound is magnificent, a compact subwoofer, 2000 WRMS, its shoot fort.Personnelement I chose a jbl srx728S due budget, but one who can save this amount, I say close your eyes, or go hear what.